Cyber Software Engineer - SC - Perm

• Location(s): Gloucester, Woking and Manchester
• Type: Hybrid
• Salary: £40,000 - £70,000
• Clearance: Must hold an active SC Clearance
• Must be eligible for further clearances (DV)
• Must be a sole British national

Job Description:

The successful applicant will join teams working at the forefront of AI/DS, Cyber, Cloud, DevOps/SRE and Platform Engineering. With long-term programmes secured across the latest frameworks, this position offers the chance to be part of an exciting growth journey with significant technical depth and variety.

As a Cyber Software Engineer, the successful applicant will contribute to the research, design and development of critical systems in support of National Security missions. They will apply secure coding practices, maintain high standards of software quality and work closely with operating systems at a low level.

Key Requirements

* Strong experience with C or C++
* Familiarity with Python
* Comfortable working with Linux or Windows operating systems
* Knowledge of version control tools and experience in agile delivery environments
* An interest in the Cyber domain
* Understanding of common software design and testing patterns
* Ability to build systems and support continuous integration pipelines

Clearance

Due to the nature of the work, applicants must be eligible to obtain DV clearance. This requires being a British Citizen and having lived in the UK for the past 10 years.

Reasonable Adjustments:

Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.

If you need any help or adjustments during the recruitment process for any reason, please let us know when you apply or talk to the recruiters directly so we can support you.

Python Software Engineer

Bristol (Hybrid)

A growing tech startup is looking for a Python Software Engineer to join their engineering team and help build and improve a behavioural science platform used by consumer brands.

You’ll work closely with the Head of Engineering in a collaborative team, contributing across the platform and customer-facing product. This is a hands-on role suited to someone who enjoys varied engineering challenges and the opportunity to wear multiple hats in a startup environment.

Responsibilities

• Develop backend services and APIs using Python
• Contribute to the development of the core platform and product features
• Build and maintain services using Docker and AWS
• Work within a Linux-first development environment
• Collaborate closely with the Head of Engineering on platform improvements
• Take ownership of problems and contribute across different areas of the product as needed

Tech Stack

• Python
• FastAPI
• Docker / containerisation
• AWS
• Linux

About You

• Around 2-4 years of software engineering experience
• Strong Python development skills
• Experience building APIs or backend services
• Comfortable working in Linux environments
• Familiar with AWS or cloud infrastructure
• Experience with Docker or containerised applications
• Enjoy working in small teams where engineers take ownership

Ready to Apply?

Contact Jack Winder to find out more.
Please apply with a CV and a cover letter outlining why you’re perfect for the role.
Know someone great for the job? We offer a referral scheme-just get in touch!
Note: We do our best to respond to every application, but due to volume, we can’t always guarantee it. If you haven’t heard back within 7 days, unfortunately, you haven’t been successful this time. Keep an eye on our site for new opportunities!

Develop your consultancy and software engineering skills with varied high tech projects This established technical consultancy develops advanced software and hardware for government and commercial sector clients. Due to continued success, they are seeking an accomplished C/C++ and Linux software engineer to join their team. Varied multidisciplinary projects mean that you could be working on areas such as diverse as DSP, image processing, or UI design. You can expect to work closely with counterparts from client organisations as well as colleagues from different technical backgrounds. You may also have opportunities to lead projects and mentor new colleagues. You will need: \* A strong academic record, with a first or 2.1 in a numerate STEM discipline, mostly A\* or A at A-level grades, or equivalent. Whilst not essential, A relevant Master's or PhD would benefit your application. \* Good client-facing communications skills. Able to discuss technical subject matter with colleague \* Substantial commercial experience of software design and development in C or C++ and Linux, and familiarity with best practice. Front end coding skills in TypeScript/JavaScript and HTML would be useful. \* Full right to work in the UK, and ability to obtain a higher level (DV) UK security clearance. Typically this will require you to have British nationality and to have been resident in the UK for 10 years This variety makes the role ideal for an experienced engineer looking to broaden their technical and consultancy skillset into areas such as image processing, interface design, or digital signal processing. This is a fully office-based, due to the nature of the work, but with some latitude for those requiring flexible arrangements. A highly competitive salary and benefits package, excellent pension scheme, and a performance-based bonus are on offer to the successful candidate. Keywords: Experienced Software Engineer, C, C++, Linux, Consultancy, Client-Facing, Cybersecurity, Defence, Gloucestershire Another top job from ECM, the high-tech recruitment experts. Even if this job's not quite right, do contact us now - we may well have the ideal job for you. To discuss your requirements call ecm or email your CV. We will always ask before forwarding your CV. Please apply (quoting ref: CV27605) only if you are eligible to live and work in the UK. By submitting your details you certify that the information you provide is accurate

Data Centre Analyst - Hybrid

Our client is urgently looking for an experienced Data Centre Analyst to join their team on a permanent basis.

Please note, the role is hybrid, with 2-3 days per week required on-site.

You will provide 3rd line IT Infrastructure support for key systems and services across the business. You’ll work within a highly skilled and competent team of technology experts to deliver excellent quality IT services. You will assist in key technical projects, responsible for ensuring high standards of capacity, continuity and availability of all systems under the Data Centre team’s remit.

You will be rewarded with an excellent salary, as well as a brilliant benefits package including 5% bonus, annual leave, pension scheme (matched up to 8%), health cash plan, life assurance, hybrid working and many, many more perks!

Data Centre Analyst - Key Skills:

• Microsoft Servers
• Linux Servers (beneficial, not absolutely essential)
• Hyper-V (virtualisation)
• NetApp (storage)
• Experience covering 3rd line support

Data Centre Analyst - Hybrid

Due to the volume of applications received for positions, it will not be possible to respond to all applications and only applicants who are considered suitable for interview will be contacted.

Proactive Appointments Limited operates as an employment agency and employment business and is an equal opportunities organisation

We take our obligations to protect your personal data very seriously. Any information provided to us will be processed as detailed in our Privacy Notice, a copy of which can be found on our website

About CACI

From our headquarters in London, we’re busy empowering organisations to make bold, strategic moves with the power of data and technology. Founded in 1975, our operations take place from multiple offices across the UK, Europe and India with over 1600 Full time employees and an annual turnover of £179m.

Our expertise spans industries, from retail and education to public sector and transport - delivering intelligent solutions that drive progress and create measurable impact. Whether it’s business intelligence, customer marketing, cloud infrastructure, cybersecurity, critical national infrastructure or data management, our approach is never one-size-fits-all.

We don’t just deliver solutions; we build for the tomorrow’s world, all while fostering a culture that allows employees to be their authentic selves and succeed in their careers.

About Network Services

CACI Network Services is a rapidly expanding specialist IT and Networks consultancy offering a wide variety of opportunities to work within challenging and exciting environments with our major clients in Global Media, Banking, Government, Telecoms & Utilities

Key responsibilities

• HS and LS Voice and Video telephony platforms.
• Partner Connectivity across the UK and overseas
• Underlying infrastructure to support UC Applications
• Develop additional UC skills to aid in the support of other UC Team Collaboration
• Tools and Audio-Visual and Managed Events capability to help create a multidisciplinary team.
• Hardware installation/configuration
• Infrastructure support - Flexpod, NettApps

Other responsibilities could include:

• Faults and service requests
• Technical escalations
• Contribute to the Internal monitoring and management tools (Grafana, Splunk and python based tools, Ansible)

Core skills, knowledge and experience required

Network Infrastructure

o LAN/WAN fundamentals, QoS for video and voice traffic.

o VLAN design, IP Addressing

o Secure device onboarding and certificate management.

• Firewall administration (Cisco ASA/Firepower, Palo Alto, Fortinet)

Unified Communications Platforms

o Cisco UC products

• Cisco Unified Communications Manager (CUCM), Cisco Jabber, Cisco Unity Connection, Cisco Expressway, Cisco Meeting Server

o Webex Control Hub administration.

o SIP protocol understanding.

o Interoperability and integration with Microsoft 365 or other UC tools.

Servers & Storage

o Physical and virtual server installation, configuration, and support (Windows Server, Linux distributions).

o Expertise in virtualisation platforms (VMware vSphere)

o Storage provisioning, replication, and backup solutions.

o Cisco UCS, Hyperflex, FlexPOD

o Netapp

Infrastructure Automation & Monitoring

o Scripting and automation

o Infrastructure as Code (IaC) experience (Terraform, Ansible).

o Splunk, Grafana

Video Conferencing Systems

o Deploy, configure, and troubleshoot Cisco VTC endpoints (Room Kits, Webex Boards, SX/MX series, Desk series).

o Knowledge of Zoom Rooms, Microsoft Teams Rooms, and interoperability gateways.

Cloud Infrastructure

o Amazon Web Services (AWS) architecture and management.

o Hybrid cloud deployments & integration with on-premise systems.

o Cloud networking, security groups, and resource optimisation.

Expected behaviors

We have a structured performance management framework which measures continual attainment against key personal behaviours. We believe this is an important part of our success and culture. Joining as a team member we expect you to act as a role model and exemplar against these behaviours which are to be:

• Proactive
• Adaptable
• Flexible
• A team player
• Reliable

Flexibility

The key to our success is our teamwork and collaboration. We take a hybrid approach - working remotely and coming into the office depending on the business demand and collaboration required as part of the delivery process.

Equal opportunities

CACI is proud to be an equal employer. Embracing the diversity of our people, we are on a journey to build a truly inclusive work environment where no one is treated less favorably due to ethnic origin, age, gender, veteran status, religion or belief, sexual orientation, marital status, and disability or health condition, actively working to prevent discrimination.

As a Disability Confident employer, we will:

• Provide reasonable adjustments in the recruitment process where requested (contact a member of the recruitment team to discuss individual requirements further).
• Offer people with health conditions and disabilities, meeting the minimum criteria for a role, an interview.

Our people are unique, and we encourage, and support them, to be confident in contributing to our inclusion journey.

Package - £55,000 - £85,000 (depending in experience level)

Benefits - DV Bonus plus excellent benefits

Clearance - Cleared to eDV level

Location - Cheltenham or Manchester

Join a trusted leader in National Security technology solutions.

Do you enjoy solving technical cyber problems and identifying vulnerabilities?

As part of our client’s expanding National Security division, you’ll contribute to high-impact missions across AI/Data Science, Cybersecurity, Cloud, DevOps, and Platform Engineering. We’re seeking inquisitive individuals who excel at dissecting technical systems, not just to understand how they work, but to identify weaknesses, assess risks, and develop mitigation strategies.

What You’ll Be Doing

• Software analysis and reverse engineering of compiled or interpreted code that could be obfuscated or defensively structured, for either x86/x64 or ARM processor architectures.

• Reverse engineering a wide range of technologies to uncover vulnerabilities and improve security including operating systems and/or firmware internals, security architectures and hardware abstraction.

• Engineering software from design to delivery in modern IDEs and languages, using Agile delivery.

• Creating tested and testable code. Integrating with automated verification systems, CI and CD pipelines.

• Working closely with cybersecurity teams to prioritize vulnerabilities and implement patching strategies.

• Collaborating in Agile teams to deliver innovative, secure, and robust technical solutions.

What We’re Looking For

• Proficiency in one or more of C, C++, Java or C#.
• Familiarity with scripting and automation using Python, Bash, Powershell or Groovy.
• Experience working with IDA Pro or Ghidra for reverse engineering
• Experience working with Linux or Windows-based systems.
• Awareness of secure coding practices and modern cybersecurity threats.
• Knowledge of principles used in Agile environments.

Desirable exposure

Any exposure of AI, ML, Cloud or Virtualisation would be considered a plus.

Clearance required

You will already hold an active eDV security clearance

This is an incredible opportunity to be at the forefront of National Security innovation. If you’re naturally curious, thrive in high-stakes environments, and want to make a real impact, apply today!

As an industry leading, nationwide Marketing, Digital, Analytics, IT and Design recruitment agency, we are continually receiving new assignments to work on, so keep a close eye on our website, Facebook, LinkedIn and Twitter pages for a full list of current permanent and interim opportunities as well as marketplace news and fun stuff.
Forward Role is operating as an employment agency.

Raytheon UK has a unique, perm opportunity for a Senior Data Scientist and Machine Learning Researcher to join our Strategic Research Group (SRG).

As a Senior Data Scientist and Machine Learning Researcher, you will be responsible for the technical development and leadership of AI/ML projects from initial idea scoping right through to final project delivery both in customer and internal domains. You will demonstrate novel thinking and propose new ideas for solving challenging problems while mentoring others on your project team to deliver towards your proposed solution.

Based in Gloucester, Manchester or London in a hybrid capacity (average of 3 days a week on-site). You must be eligible and willing to gain SC and eDV clearance.

Responsibilities

Develop complex, novel data science solutions, contributing significantly to machine learning projects with minimal guidance

Brings experience in scoping, designing, and delivering data-centric solutions while working collaboratively across disciplines

Undertake research and applied AI/ML tasks on both customer and internal research projects

Generate ideas for new research directions and provide technical leadership in small project groups

Mentor more junior team members within their project team and the wider SRG

Work with customers and internal stakeholders, with varied technical knowledge, to determine appropriate technical approaches and do the technical development required for delivery.

Required Skills & Experience

BSc in Machine Learning, Data Science, Computer Science, Mathematics or related field

Experience coding in Python and associated ML packages (HuggingFace, TensorFlow, PyTorch)

Proven experience of delivering ML solutions to customers and internal stakeholders

Demonstrate deep understanding of AI/ML algorithms for different data types and tasks including Generative AI, NLP and computer vision, sufficient to be able to undertake research and development beyond existing literature.

Experience of training and developing AI models including Large Language Models

Ability to produce high-quality scientific writing for internal & external stakeholders as well as academic publications

Experience of mentoring and undertaking technical leadership on small projects

Desirable Skills & Experience

PhD. or Masters degree

Experience using robust ML pipelines, appropriate version control and environment management (e.g. venvs or Docker)

Working knowledge of Linux systems, using basic commandline functionality (e.g. AWS CLI, Docker CLI, Linux commands)

Experience of deploying AI models in a scalable way for external users

Experience working in Cloud, preferably AWS but also GCP or Azure

Research publications in peer reviewed journals

Experience of writing technical project proposals

Benefits and Work Culture

37hr working week with early finish Fridays - start your weekend early!

An informal, flexible working culture that is output focused

25 days holiday + statutory public holidays, plus opportunity to buy and sell up to 5 days and up to 5 paid days volunteering

Contributory Pension Scheme (up to 10.5% company contribution)

Annual company bonus scheme (discretionary)

6 times salary Life Assurance with pension

Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work, amongst others

Enhanced sick pay

Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave

Raytheon UK

This business area provides DevSecOps at scale, Artificial Intelligence, Machine Learning, cyber and geospatial intelligence capabilities to support the defence, intelligence and cyber sectors. Collaborating with customers and suppliers to deliver secure, mission critical systems using the latest technologies and innovations.

Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. Together, we are not just advancing technology; we’re building a community committed to safeguarding a safer and more connected world.

RTX

Raytheon UK is a landed company and part of the wider RTX organisation. Headquartered in Arlington, Virginia, USA, but with over 180,000 employees globally across every continent, RTX provides advanced systems and services for commercial, military and government customers worldwide and comprises three industry-leading businesses - Collins Aerospace Systems, Pratt & Whitney, and Raytheon.

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Role: Cyber Security Consultant Location: Remote/Hybrid (Mix of home working, Gloucestershire office and client site visits) Salary: £45,000 + Expenses + Overnight Allowance (TBC) Active SC Clearance is a requirement - must be willing to pursue DV Clearance

We are looking for an experienced Cyber Security Consultant to join a well-established and growing UK-based cybersecurity consultancy, delivering high quality penetration testing services across a varied and interesting client base including government and public sector organisations.

This is a role for someone who can hit the ground running. You’ll be joining a team of around 13-15 consultants and are expected to operate independently from day one. No two weeks look the same; work pattern is flexible and dictated by client demand, with a genuine mix of home working, office time in Gloucestershire, and client site visits as required.

Key Responsibilities:

• Deliver CHECK and non-CHECK penetration testing engagements across infrastructure, web applications, mobile, cloud, and Active Directory environments
• Support pre-sales activity through scoping and client engagement
• Produce clear, high quality technical reports and present findings to clients
• Maintain up to date knowledge of current threat trends, tools, and industry frameworks
• Contribute to internal training materials and technical blog content
• Provide guidance and support to junior team members when required

Requirements:

• Active SC Clearance is an ABSOLUTE MUST - must be willing to pursue DV Clearance
• Active CSTM or CCT certification is an ABSOLUTE MUST
• Proven hands-on penetration testing experience - must be able to hit the ground running
• Strong knowledge of testing frameworks including OWASP
• Knowledge of Cyber Security standards and policies such as ISO 27001, CIS, and PCI DSS.
• Experience across Linux and Windows environments
• Knowledge of cloud environments (Azure, AWS)
• Strong written and verbal communication skills with experience presenting to clients

Benefits:

• £45,000 + Expenses + Overnight Bonus
• 31 Days Annual Leave (20 + 8 BH + 3 Xmas Shutdown)
• Paid Charity Day
• Up to 5 unpaid annual leave days per year
• Company pension scheme

Role: Cyber Security ConsultantLocation: Remote/Hybrid (Mix of home working, Gloucestershire office and client site visits)Salary: £45,000 + Expenses + Overnight Allowance (TBC)Active SC Clearance is a requirement - must be willing to pursue DV Clearance

Oscar Associates (UK) Limited is acting as an Employment Agency in relation to this vacancy.

To understand more about what we do with your data please review our privacy policy in the privacy section of the Oscar website.

Role: Junior Systems Engineer (Fresh Graduates Welcome!)
Location: Gloucestershire (Office-based; Hybrid options available after probation period)
Salary: £25,000 - £29,000 per annum

*Applicants must have the permanent right to work in the UK; no visa sponsorship is available for this position.

Are you a tech-obsessed graduate or a “tinkerer” looking to accelerate your career in Cyber Security?

We are partnering with a specialist intelligence firm in Gloucestershire to find a Junior Systems Engineer. This isn’t just a support role; it is a career launchpad where you will be mentored by senior staff to take on complex infrastructure projects.

Why This Role?

• Mentorship: You will receive regular 1-on-1 guidance to help you master new systems.
• Project Ownership: Alongside daily duties, you’ll research and complete independent technical projects.
• Advanced Exposure: While you’ll start with IT fundamentals, you’ll eventually get hands-on with Data Centre footprints, Containerisation, and Kubernetes.
• High Impact: You’ll support a team that identifies insider threats and protects critical infrastructure.

What You’ll Be Doing:

• Systems Management: Providing first-line support for Windows, Apple, and Linux devices.
• Onboarding: Handling all IT aspects for new employees to ensure they are ready for day one.
• Infrastructure Support: Managing the Microsoft Intune environment and assisting with server configurations.

Who You Are:

• Early Career: You might be a fresh graduate or someone with 1-2 years of IT experience.
• Self-Motivated: You have a genuine passion for hardware and software and love learning independently.
• Technical Foundation: You have some familiarity with Windows 11, Linux, and basic networking concepts.
• Mobile: You must have a driving license and your own car for occasional travel.

Apply now or email me for a confidential chat!

DevOps Infrastructure Engineer

Hybrid

Are you passionate about building secure, efficient, and scalable infrastructure that supports innovation and continuous improvement?
We’re looking for a DevOps Infrastructure Engineer to play a key role in developing, maintaining, and optimising the systems and tools that keep our business running smoothly.

What You’ll Do

You’ll be responsible for the planning, provisioning, installation, and configuration of systems hardware and software - ensuring our infrastructure operates efficiently, securely, and reliably.

In this role, you will:

• Build and manage virtual domain infrastructure, servers, and development tools to meet evolving business needs.
• Automate and enhance development, deployment, and release processes to support continuous improvement.
• Implement and maintain robust security and configuration baselines to protect against cybersecurity threats.
• Diagnose and resolve technical problems quickly and effectively.
• Collaborate with software developers and engineers to ensure seamless integration and deployment.
• Create and maintain technical documentation to support knowledge sharing and decision-making.
• Contribute to infrastructure projects and provide clear reports and updates to stakeholders.

What You’ll Bring

We’re looking for someone who thrives in a collaborative, fast-paced environment and enjoys solving complex problems.

Essential experience includes:

• Infrastructure engineering in a corporate or DevOps environment using Windows and Linux systems
• Knowledge of virtualisation technologies such as VMware or Nutanix
• Experience with DevOps tools such as Git, Jira, Confluence, Jenkins, Artifactory

You’ll also be someone who:

• Works effectively as part of a team, supporting colleagues and sharing expertise
• Communicates clearly and confidently across all levels
• Adapts easily to change and takes initiative to solve problems
• Strives for excellence, ensuring high-quality results every time

Why Join Us?

We offer a supportive and flexible environment where innovation and collaboration thrive. You can expect:

• Hybrid working and flexible hours
• 25 days annual leave plus bank holidays (increasing with service)
• Pension, life, and critical care cover
• Medicash and employee assistance programme
• Discounts, wellbeing support, and salary sacrifice options (tech, EVs, bikes)
• Professional development and funded membership fees
• Family-friendly policies including enhanced family leave

At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence.

Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development. We provide a collaborative environment, abundant opportunities for professional development, and a profound sense of purpose in what we do. Together, we are not just advancing technology; we’re building a community committed to safeguarding a safer and more connected world.

This Senior Data Scientist & Machine Learning Researcher is within the Strategic Research Group (SRG). The SRG are a team of Data Science, Machine Learning and AI specialists who develop novel AI solutions to mission focused problems. In this role you will be responsible for the technical development and leadership of AI/ML projects from initial idea scoping right through to final project delivery both in customer and internal domains. You will demonstrate novel thinking and propose new ideas for solving challenging problems while mentoring others on your project team to deliver towards your proposed solution.

Responsibilities

• Develop complex, novel data science solutions, contributing significantly to machine learning projects with minimal guidance.
• Brings experience in scoping, designing, and delivering data-centric solutions while working collaboratively across disciplines.
• Undertake research and applied AI/ML tasks on both customer and internal research projects.
• Provide technical leadership in small project groups.
• Generate ideas for new research directions.
• Advise on suitability of group research ideas based on previous experience.
• Mentor more junior team members within their project team and the wider SRG.
• Deliver AI/ML/Data Science solutions to broad range of problems in defence.
• Work with customers and internal stakeholders to determine appropriate technical approaches and do the technical development required for delivery.
• Prepared to present and undertake practical demonstrations of work internally in the team and to senior stakeholders with adaptability to audiences of different levels of technical expertise.

Required Skills & Experience

• BSc in Machine Learning, Data Science, Computer Science, Mathematics or related field.
• Experience coding in Python and associated ML packages (HuggingFace, TensorFlow, PyTorch).
• Have an established track record of delivering ML solutions to customers and internal stakeholders.
• Demonstrate deep understanding of AI/ML algorithms for different data types and tasks including Generative AI, NLP and computer vision, sufficient to be able to undertake research and development beyond existing literature.
• Experience of training and developing AI models including Large Language Models.
• Ability to produce high-quality scientific writing for internal & external stakeholders as well as academic publications.
• Experience of mentoring other team members and undertaking technical leadership on small projects or sub-parts of larger deliveries.

Desirable Skills & Experience

• Experience using robust ML pipelines, appropriate version control and environment management (e.g. venvs / Docker)
• Working knowledge of Linux systems, using basic commandline functionality
• Experience of deploying AI models in a scalable way for external users.
• Experience working with cloud services
• Experience of writing technical project proposals.

Benefits

• 25 days holiday + statutory public holidays, plus opportunity to buy / sell up to 5 days
• Contributory Pension Scheme (up to 10.5% company contribution)
• Company bonus scheme (discretionary)
• 6 times salary Life Assurance
• Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work
• Enhanced sick pay
• Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave

Work Culture

• 37hr working week, with an early 1.30pm finish Friday
• Remote, hybrid and site based working opportunities, dependant on your needs and the requirements of the role
• Flexible working culture that is output, not time spent at desk, focused. Formal flexible working arrangements can also be requested.
• Up to 5 paid days volunteering each year

RTX

Raytheon UK is a landed company and part of the wider RTX organisation. Headquartered in Arlington, Virginia, USA, but with over 180,000 employees globally across every continent, RTX provides advanced systems and services for commercial, military and government customers worldwide and comprises three industry-leading businesses - Collins Aerospace Systems, Pratt & Whitney, and Raytheon.

Supporting over 35,000 jobs across 13 UK sites, RTX is helping to drive prosperity. Each year our work contributes over £2.7bn to the UK economy and offers a wealth of opportunities to 4,000 suppliers across England, Scotland, Wales and Northern Ireland. We’re investing in all corners of the country, supporting 29,040 jobs in England, 3,040 in Northern Ireland, 1,900 in Scotland and 1,600 in Wales.

Contract Software Engineer (DV Cleared) 6 Months (Initially) Romsey OR Gloucester for On-site Work €(Apply online only) per day (Inside IR35) iO Associates is proudly partnering an R&D client, specialising in developing cutting-edge technology for our National Security. We are looking for a Software Engineer who holds a current DV clearance to join the team on an Initial 6 month basis (with a high likelihood of extension). The role itself will involve designing, developing and optimising OpenCPI components and application for SIGINT and RF Systems. Along with the additional tasks below: Integrate OpenCPI solutions onto FPGA-based and embedded SDR platforms. Support system architecture, trade studies, and technical design decisions. Ensure robust, scalable and reusable OpenCPI-based implementations.Key Responsibilities Involve: Engineering & Development Develop OpenCPI workers and containers in C/C++ and HDL (VHDL/Verilog where required). Integrate DSP chains into FPGA and embedded Linux environments. Conduct trade-off analysis across performance, latency and resource utilisation. Support hardware/software integration in secure lab and customer environments.Knowledge, Skills & Experience: Demonstrable hands-on experience with OpenCPI framework. Strong C/C++ development in embedded or Linux environments. Understanding of digital signal processing (DSP) principles. Experience integrating FPGA-based platforms (e.g. Xilinx or Intel toolchains). Experience working within secure National Security or MOD environments. Ability to troubleshoot complex integration and performance issues. Experience working with SDR and RF signal processing systemsDue to the nature of the work, this is an on-site role. We can only consider contractors who have an active DV clearance for this position. If you're interested, please apply to the link for consideration

Site Reliability Engineer Bristol, Hybrid (3 days onsite, 2 from home) Up to £95K & Great Benefits

Ready to take on high-impact engineering challenges that actually matter? Want to work on mission-critical systems used across the UK s most high-profile government organisations?

This is your chance to join TwinStream a team of elite engineers who built their careers cracking complex cross-domain problems, and then built a company to do it even better.

We re growing fast. Demand for our services is skyrocketing. And now we re looking for a Site Reliability Engineer who s ready to step into a role with real ownership, real influence, and real opportunities to innovate.

Why You ll Love This Role

As our new SRE, you ll be right at the heart of our evolving cloud and on-prem platforms. This isn t a keep the lights on job it s a role where you ll shape infrastructure strategy, partner closely with software and systems teams, and push performance, reliability, and automation to the next level.

You’ll help us evolve observability, enhance delivery pipelines, eliminate toil, drive reliability metrics, and make smart technical decisions that keep our systems robust as we scale.

If you love solving gnarly problems, improving how things work, and innovating at speed this is the role for you.

Key Responsibilities of the Site Reliability Engineer:

• Collaborating with Software Engineers to improve subsystem reliability and performance
• Partnering with System Administrators to automate toil and cut down alert noise
• Taking observability to the next level find issues before they hit the business
• Supporting development environments to boost speed and quality
• Researching & evaluating tools to guide key buy-vs-build decisions
• Deepening your expertise across multiple technical and business domains
• Expanding your knowledge of diverse tech stacks and platforms

What You Bring

• Modern configuration management tools (Ansible, Chef or similar)
• Terraform
• Docker containers & orchestration (Kubernetes, OpenShift, Docker Swarm)
• CI/CD tooling (Jenkins or similar)
• Monitoring/metrics stack (InfluxDB, Prometheus, Grafana)
• MQ messaging (RabbitMQ or other AMQP solutions)
• SQL & relational databases
• Linux administration & shell scripting
• Network security fundamentals
• Cloud hosting (ideally AWS: EC2, RDS, S3, Lambda)

Bonus points for:

• Experience with Java, Go, Python or similar
• Knowledge of cross-domain principles & tech
• Service management experience
• Hands-on observability implementation
• Proven ability to reduce downtime with smart reliability metrics

Why You ll Love Working at TwinStream

• Competitive salary, £65k - £95k DOE
• 8% employer pension contribution
• Private medical healthcare (including dental & optical for the whole family)
• Flexible working culture
• Learning & development owned by YOU
• Electric vehicle salary-sacrifice scheme
• 28 days holiday + bank holidays
• Regular team events, plus Christmas & summer parties
• Life assurance & cycle-to-work scheme

Security Clearance

You ll need to be eligible for SC and/or DV clearance. Any offer will be subject to successful security screening.

Ready to engineer impact?

Apply now and shape the future of secure, high-performance cross-domain systems.

Ultra PCS is a leader in providing solutions for aerospace and defence systems. We are seeking an experienced Software Engineer to join our team. We are searching for a dynamic highly skilled Software Engineer with a wide breadth of skills who is interested in applying those skills and furthering their development skillset on a variety of software projects.

As a Principle Software Engineer, you will be expected to produce C++ code to produce custom plugins for our EAK GVA platform. The successful applicant will have experience in distilling requirements from interactions with a customer, implementing verified robust C++ solutions in short timescales to demonstrate new capability, and authoring and performing verification and validation.

Key Responsibilities:

• Requirements definition, design, development, and verification for a variety of integrity levels, from safety critical to proof of concept.
• Coding to internel coding standards and ensuring high quality robust solutions.
• Conduct design and code reviews to maintain high-quality standards.
• Debugging in embedded environments.
• Develop Verification and Validation Strategies
• Perform verification exercises.

Required Skills and Experience:

• High proficiency in C++
• High proficiency in Embedded Linux
• Proficiency in Graphical Frameworks such as Vulkan, OpenGl, QT
• CI/CD workflow. Experience with Git, Containerised development environments, CI/CD
• Familiarity with debugging tools, hardware interfaces, and safety analysis techniques.

Personal Attributes:

• Strong organizational skills with the ability to collaborate in a wider team.
• Excellent communication skills, capable of effectively liaising with technical and non-technical stakeholders.

Our Principal Data Scientist & Machine Learning Researcher sits within the Strategic Research Group (SRG). The SRG are a team of Data Science, Machine Learning and AI specialists who develop novel AI solutions to mission focused problems. In this role you will work with high levels of autonomy and be responsible for the design, planning and technical leadership of multiple AI/ML projects. You will help lead and set technical and strategic direction for the group, support with customer and stakeholder engagement and deliver technical solutions on internal and external projects.

At Raytheon UK, we take immense pride in being a leader in defence and aerospace technology. As an employer, we are dedicated to fuelling innovation, nurturing talent, and fostering a culture of excellence. Joining our team means being part of an organisation that shapes the future of national security whilst investing in your growth and personal development.

Hybrid role: 3 days a week at our site(s) or customer site min

Must be eligible and willing to gain SC & eDV clearance

Responsibilities

• Support the Head of Data Science & Machine Learning using your experience to contribute to the group strategy and stakeholder engagement.
• Bring ideas for novel research that will drive competitive advantage in across our customer community.
• Work with autonomy to develop complex, novel data science solutions.
• Support in triaging and responding to opportunities, aligning to the group and wider business strategies.
• Design and deliver data-centric solutions while working collaboratively across disciplines.
• Technical delivery of research and applied AI/ML tasks on both customer and internal research projects.
• Provide technical leadership across multiple projects.
• Manage more junior team members across the SRG.
• Deliver AI/ML/Data Science solutions to broad range of problems in defence.
• Work with customers and internal stakeholders to determine appropriate technical approaches and do the technical development required for delivery.
• Prepared to present and undertake practical demonstrations of work internally in the team, to senior stakeholders and at conferences with adaptability to audiences of different levels of technical expertise.

Required Skills & Experience

• Strong experience of delivering novel ML solutions to customers and internal stakeholders
• Excellent coding practice using Python and associated ML packages (HuggingFace, TensorFlow, PyTorch), following best practices
• Experience developing robust ML pipelines with MLOps tools for model training, monitoring and deployment
• Experience of appropriate version control and environment management (such as venvs or Docker)
• Experience of writing technical project proposals
• Experience of managing teams either line management or technically
• Expert knowledge of AI/ML algorithms for different data types and tasks including Generative AI, NLP and computer vision, sufficient to be able to propose research beyond existing literature
• Experience of training and developing AI models including Large Language Models
• Ability to produce high-quality scientific writing for internal & external stakeholders as well as academic publications
• Ability to work with high levels of autonomy, with awareness of appropriate business policies and strategy to dictate your actions

Desirable Skills & Experience

• Experience of deploying AI models in a scalable way for external users.
• Experience developing supporting systems for AI deployments (e.g. backend databases, front end UIs)
• Working knowledge of Linux systems, using basic commandline functionality (e.g. AWS CLI, Docker CLI, Linux commands like ssh, ls, cd)
• Experience working in Cloud services

Benefits

• 25 days holiday + statutory public holidays, plus opportunity to buy and sell up to 5 days
• Contributory Pension Scheme (up to 10.5% company contribution)
• Company bonus scheme (discretionary)
• 6 times salary Life Assurance
• Flexible Benefits scheme with extensive salary sacrifice schemes, including Health Cashplan, Dental, and Cycle to Work
• Enhanced sick pay
• Enhanced family friendly policies including enhanced maternity, paternity & shared parental leave
• Private Medical Insurance (dependant on grade)

Work Culture

• 37hr working week, with an early 1.30pm finish Friday
• Flexible working culture that is output, not time spent at desk, focused. More formal flexible working arrangements can also be requested.
• Up to 5 paid days volunteering each year

RTX

Raytheon UK is a landed company and part of the wider RTX organisation. Headquartered in Arlington, Virginia, USA, but with over 180,000 employees globally across every continent, RTX provides advanced systems and services for commercial, military and government customers worldwide and comprises three industry-leading businesses - Collins Aerospace Systems, Pratt & Whitney, and Raytheon.

Supporting over 35,000 jobs across 13 UK sites, RTX is helping to drive prosperity. Each year our work contributes over £2.7bn to the UK economy and offers a wealth of opportunities to 4,000 suppliers across England, Scotland, Wales and Northern Ireland. We’re investing in all corners of the country, supporting 29,040 jobs in England, 3,040 in Northern Ireland, 1,900 in Scotland and 1,600 in Wales.

Infrastructure Engineer

Salary: £40,000 - £55,000 plus a strong benefits package
Security Clearance: SC clearance required (with eligibility for DV)
Location - Cheltenham

Role Overview

We’re seeking an Infrastructure Engineer to join an ambitious technology function supporting secure, mission-critical environments for well-known clients. This position offers a broad technical scope, working across on-premise, cloud, and hybrid platforms while helping to evolve infrastructure through automation, modern tooling, and best practice.

You’ll be hands-on, technically curious, and comfortable collaborating with DevOps and security specialists to improve resilience, performance, and scalability across the estate.

Key Responsibilities

• Design, deploy, and maintain physical and virtual server environments
• Administer cloud and hybrid platforms using AWS, Azure, and/or GCP
• Support and troubleshoot enterprise networking technologies including firewalls, VPNs, routing, switching, and load balancing
• Manage identity, access control, and authentication services in line with security standards
• Create and maintain scripts and automation to streamline infrastructure operations
• Implement and support monitoring, logging, and alerting solutions to enhance system reliability
• Maintain backup, disaster recovery, and business continuity capabilities
• Investigate and resolve infrastructure incidents, performing root cause analysis where required
• Work closely with DevOps, cyber security, and application teams on ongoing improvements and project delivery

Skills & Experience

• At least 2 years’ experience in an Infrastructure, Systems, or Platform Engineering role
• Strong administration skills across Windows and/or Linux environments
• Practical experience with virtualisation technologies such as VMware, Hyper-V, or KVM
• Solid understanding of networking fundamentals including DNS, DHCP, TCP/IP, and VLANs
• Scripting ability using tools like PowerShell, Bash, or Python
• Hands-on experience with cloud services, particularly AWS and/or Azure
• Exposure to monitoring and observability platforms such as Splunk, Datadog, or Nagios
• Good understanding of infrastructure security concepts and best practices
• Experience using Infrastructure as Code and automation tools (e.g. Terraform, Ansible, CloudFormation)
• Familiarity with enterprise storage and backup solutions, including SAN/NAS technologies

As an industry leading, nationwide Marketing, Digital, Analytics, IT and Design recruitment agency, we are continually receiving new assignments to work on, so keep a close eye on our website, Facebook, LinkedIn and Twitter pages for a full list of current permanent and interim opportunities as well as marketplace news and fun stuff.
Forward Role is operating as an employment agency.

Day Rate: £650 (Inside IR35)
Contract Length: 12 months
Clearance Required: UK SC and willing to undergo DV

Location - 4 days on site - Gloucester / Hereford

An opportunity is available for an experienced Integration Engineer to join a high-profile defence programme, working on the integration of mobile and server-based systems within a secure environment.

The Role

You will operate as a senior technical contributor, acting as a bridge between customers, software development teams, and third-party suppliers. The focus is on integrating, configuring, and supporting Linux-based systems and containerised applications, alongside mobile and Android platforms.

You should be comfortable working across the full system landscape, understanding software at a broad level, and contributing to solution design, configuration, and troubleshooting.

Key Responsibilities

• System administration of multiple Linux machines running critical services
• Managing and supporting container-based applications (Docker)
• Certificate management
• Setup and configuration of applications and services on Linux systems
• Setup and configuration of applications on Android devices
• Integrating mobile and server-based systems
• Debugging configuration and networking issues across systems
• Administering mobile device management (MDM) platforms
• Eliciting user requirements to define device configurations and setup processes
• Producing clear documentation for configurations and processes

Required Skills & Experience

• Proficiency in Linux system administration
• Experience with containerisation technologies (Docker / Podman)
• Comfortable working with Android devices
• Basic understanding of networking and secure systems
• Ability to write software (experience with Java and/or Kotlin desirable)
• Excellent problem-solving, communication, and documentation skills

Ideal Profile

• Keen to work hands-on with Linux-based systems and containerised environments
• Broad understanding of software development and system design
• Comfortable operating as a senior engineer on projects and engaging directly with customers

Interview Process

• Single-stage interview via Microsoft Teams

If you are an experienced Integration Engineer seeking a long-term, high-impact contract within a secure environment, please apply with your latest CV.

Job title: Embedded Software Engineer - Aerospace Location: Bristol
Salary: 50,000- 60,000
Job type: Permanent

iO are currently partnered with an established safety-critical business who have a magnitude of worldwide offices. Currently, they are on the lookout for a Principal Embedded Software Engineer to join on a permanent basis with the reporting office being based in Bristol.

Focusing on safety-critical projects within all industries, you will lead the current team in continuing to develop real-time operating systems whilst simultaneously providing excellent service to our development clients. You will also be given the ability to see multiple full product life cycles, right from concept to completion.

What we need from you:

• Proven experience developing software for Real-Time Operating Systems (RTOS) such as FreeRTOS, OPENRTOS, SAFERTOS, or Linux.
• Strong programming skills in C and assembler
• Solid understanding of embedded systems design and integration.
• Familiarity with ARM, MIPS, and Power processor architectures.
• Experience working at the processor level (e.g., Cortex-M3, Cortex-M4, Cortex-A7).
• Knowledge of safety-critical software development and related standards, eg IEC61508
• Proven ability to lead a team of engineers
• Eligible for UK Security Clearance

This role is perfect for an individual who thrives working in a diverse team and wishes to expand their knowledge and further the teams’ ambitions.

What we can give to you:

• Flexible hybrid hours (38 hour week)
• Annual salary review with an annual bonus (up to 5%)
• Pension Scheme - we will contribute 8% so you don’t have to!
• Life assurance inclusive of 24/7 online GP appointments
• 25 days annual leave (increasing with service)
• High-spec office environment
• Clear vision for progression

If you are looking to develop yourself (and help others) in a highly rewarding and expansive company, then this is the role for you.

Location: Cheltenham/Remote

Job Type: Permanent

Clearance: SC/DV

Are you an offensive security specialist who is excited about delivering the best service possible? Keen to work in a business where you stand to work alongside some very talented testers?

CND are working with a boutique Cyber Security consultancy who are focused on the Penetration Testing market. What makes them stand out? They are not interested in flashy marketing and would never be caught trying to pass off a Nessus scan as a Penetration Test. The business has been built on delivering excellent testing and reports as well as ensuring that clients see the real benefits of their testing outputs. The company have an office in Cheltenham however you are welcome to work where is best for you.

Key Responsibilities

• Work to deliver CHECK penetration testing services
• Lean into non-CHECK work where necessary
• Work with the sales team to flesh out technical input as needed
• Deliver quality reports to customers
• Stay up to date with industry trends and new attack methods
• Take a broad approach to testing, working on INF, APP, Mobile, AD, or Cloud tests

Essential Skills

• Currently holds a CHECK equivalency certification
• Eligibility to hold or currently hold clearance
• Experience working with Linux and Windows OS
• Strong understanding of working with common tooling for penetration testing
• Ideally, a knowledge of Cloud services such as Azure or AWS.
• Capability to script or code in Bash, Python etc
• Appreciation for Cyber Security standards such as ISO27001, PCI-DSS or CIS

This is a role with a growing, exciting organisation who can offer you a strong degree of progression and the ability to undertake testing work with incredibly interesting clients.

Java Software Engineer - Defence, Cyber & Intelligence Full-Time eDV Clearance Required

We are seeking Software Engineers at all levels to join a leading aerospace and defence organisation, delivering mission-critical software for high-impact programmes in the Defence, Cyber, and Intelligence sectors.

You’ll work on cutting-edge DevSecOps systems and applications, supporting secure digital infrastructures across the UK. This is a fantastic opportunity to contribute to meaningful projects while enjoying flexible working arrangements and excellent development opportunities.

Key Responsibilities:

• Software design, development, and debugging on secure systems
• Creating and maintaining test frameworks (e.g., JUnit 5)
• Developing in Linux environments with modern languages (Java, Python)
• Working with Agile/SCRUM practices and CI/CD pipelines (GitLab)
• Contributing across the software development lifecycle from requirements to deployment

Tech Stack Includes:

Java, Python, Linux, Git, JUnit, GitLab CI/CD, Oracle, MongoDB, JavaScript/TypeScript, React, Apache NiFi, Elasticsearch, Kibana, AWS, Hibernate, Atlassian Suite

PLEASE NOTE: eDV clearance is required to start. The process can take 6 - 18 months.

For more information on this role, please contact Daiane on (phone number removed) or send your CV to (url removed)

Candidates currently working as a Program Manager, Programme Manager, or Project Manager from Defence, Aerospace, Nuclear, or Government bodies are ideal for this role. Omega is an employment agency specialising in opportunities at all levels within the Aerospace, Automotive, Defence, Electronics, Energy, Engineering, Manufacturing, Renewable, and Scientific industries.

Omega is an employment agency specialising in opportunities at all levels within the Engineering, Manufacturing, Aerospace, Automotive, Electronics, Defence, Scientific, Energy & Renewables and Tech sectors.

Location: Stevenage OR Bristol (fully onsite)

Duration: 12 month contract

Rate: 65ph UMB (Inside IR35)

Role details:
Our client, a leading consultancy in the defence and aerospace sector, is currently seeking a C# Software Engineer to join their dynamic team. This is a contract position available in either Stevenage or Bristol, with an initial duration of 12 months and the potential for extension.

Key Responsibilities:

• The role supports the development of the world’s most advanced defence systems from concept through to in-service support and training, utilising a range of simulation technologies such as digital twins and emulators.
• Collaborating with Project Leads and Simulation Architects, you will design and develop simulation components representing an end-to-end weapon system in a synthetic environment using C#, C++, and integration simulations, adhering to industry standards.
• You will be a part of a heterogeneous agile development team consisting of engineers from various disciplines working together to develop simulations and representations of real equipment.

Their approach to software development includes:

• Configuration control
• Continuous Integration
• Continuous Delivery or Deployment
• Unit testing and test-driven development

Job Requirements:

• Proficient in C# and C++
• Experience with Microsoft Visual Studio and Eclipse
• Ability to transition from high-level system views to technical details
• Excellent verbal, presentation, and written communication skills
• Knowledge of Microsoft Windows and Linux operating systems

Desirable Skills:

• Experience with distributed simulation standards/protocols such as DIS, HLA, and DDS, as well as web services development using JavaScript, Node.js, or similar
• Familiarity with military communications, datalinks, and interfaces such as 1553/1760 and Ethernet TCP/IP
• Practical knowledge of system integration principles and processes
• Experience with hardware integration

If you are a skilled C# Software Engineer with a background in defence and aerospace and looking for a new contract opportunity, we encourage you to apply now to join our client’s innovative team in Stevenage or Bristol.