Application Security Architect
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, apply now or send your CV to me at laura.fitzgerald@cbsbutler.com