Overview

Are you ready to shape the future of secure network and server infrastructure across a global organisation? At Expleo, we’re expanding our UK Infrastructure Team and looking for a skilled Senior Infrastructure Engineer who thrives in a hands-on technical environment. If you’re passionate about designing resilient networks, solving complex challenges, and playing a critical role in large-scale technology operations, this is the opportunity for you.

What’s in It for You?

High-impact work supporting secure, enterprise-levelservers &networks across UK and global teams
A role where your expertise directly influences network & server performance, resilience, and security
Opportunities to collaborate with talented engineers across Expleo’s global 3-tier network structure
Real ownership of architecture, troubleshooting and continuous improvement initiatives
A culture built on collaboration, innovation and professional growth

Responsibilities

Design, deploy, and maintain functional LAN, WLAN, WAN & server infrastructure environments
Configure and install network devices, servers, routers and supporting technologies
Monitor network integrity, performance and security across multiple UK sites and assist colleagues across different geographies when required
Troubleshoot complex issues escalated by the team and independently resolve them
Implement and automate network tasks to improve efficiency
Mentor and guide team members on technical topics
Develop, test and oversee security solutions-including authentication and disaster recovery
Maintain full documentation of all systems, configurations and processes
Identify areas for optimisation relating to capacity, scalability and performance
Maintain strong level of technical security for UK network & server infrastructures, participate in vulnerability assessments, remediations, security audits, prepare and provide evidence if required
Maintain high levels of governance and compliance with both internal and external controls. i.e Cyber Essentials Plus and ISO27001

Qualifications

Bachelor’s degree in Computer Science, Engineering or a related field
Professional certifications such as CCNA, CCNP (Security, Firewall specialisms highly valued)

Essential skills

Strong background in network administration, switching and routing
Excellent troubleshooting skills with the ability to work independently
Strong grounding in Active Directory and policy management
Knowledge of PAN-OS, SD WAN, Cisco IOS and Extreme Network operating systems
Strong understanding of security frameworks and access control models
Azure server and related services build, configuration and maintenance
Managing backups Azure / Veeam
Client device deployment / patching (Azure Arc / SCCM / WSUS / Intune)
Technical knowledge, support, troubleshooting of MS on premises Active directory infrastructure & related services - international scale if possible - (domain controllers, DFS, GPO, replication, etc)
Knowledge of MS Cloud services and relationships with on premises infrastructure (EntraID, AD connect)
Knowledge of Microsoft 365 architecture, support, troubleshooting at least small scale (UK only), ideally international scale.

Desired skills

Organisational skills with a track record of mentoring colleagues

Experience

Experience using diagnostic, monitoring and network analysis tools
Experience working withWindows and Linux ServersHyper-V, VMWare.
Experience withfirewallconfiguration and management (Palo Alto preferred)
Hands-on experience with TCP/IP and routing protocols including BGP and OSPF

Benefits

Collaborative working environment - we stand shoulder to shoulder with our clients and our peers through good times and challenges
We empower all passionate technology loving professionals by allowing them to expand their skills and take part in inspiring projects
Always working as one team, our people are not afraid to think big and challenge the status quo

As a Disability Confident Committed Employer we have committed to:
Ensure our recruitment process is inclusive and accessible
Communicating and promoting vacancies
Offering an interview to disabled people who meet the minimum criteria for the job
Anticipating and providing reasonable adjustments as required
Supporting any existing employee who acquires a disability or long term health condition, enabling them to stay in work at least one activity that will make a difference for disabled people"We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability, religion/belief, sexual orientation or age".

We treat everyone fairly and equitably across the organisation, including providing any additional support and adjustments needed for everyone to thrive