Onsite in Bracknell
Eligible for DV clearance
£65-70k per annum + benefits package

We are seeking an experienced Security Application Architect to support the delivery and ongoing evolution of a secure Gateway capability for a strategic UK defence customer. This role combines architectural ownership, secure design governance, and operational assurance within a high-security, mission-critical environment. You’ll shape technical direction, drive change, and ensure resilient, compliant solution delivery across engineering and support teams.

What you’ll be doing;

• Own and design technical changes required to maintain and enhance Gateway capability
• Produce high-quality design documentation in collaboration with the customer and Programme Manager
• Support solution governance and architectural integrity
• Assist in maintaining secure, resilient and scalable infrastructure components across Windows and Linux environments
• Support monitoring and investigation of communications platforms such as email and XMPP-based chat, including the ability to review underlying conversation data where required for security analysis
• Contribute to file validation and inspection processes, ensuring transferred files conform to expected formats and security controls

Your technical background;Core Infrastructure

• VMware/vSphere
• RHEL & Windows Server
• Microsoft Services
• Active Directory, including Group Policy (GPO), DNS integration, LDAP directory structures, and directory management/maintenance
• Resource management of server platforms and optimisation of system performance
• Trellix/McAfee security platforms
• SIEM integration, including syslog creation, forwarding and reporting pipelines
• Email security standards and protocols

Linux & Platform Engineering

• Experience working within Red Hat Enterprise Linux environments
• Ability to write scripts to automate operational or security processes
• Familiarity with pattern matching techniques and regular expressions (Regex), particularly within security or antivirus tooling
• Configuration and management of the standard RHEL Firewall
• Exposure to Linux-based security tooling and antivirus technologies

Gateway Technologies

• Understanding of Gateway appliances and associated software
• Knowledge of secure communications protocols, including messaging platforms such as XMPP

Security & Web

• Experience supporting file validation, inspection, and content verification within secure transfer environments

If you are interested in discussing this Application Security Architect role further, please reply back with a copy of your updated CV.