Job Description:

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.

• 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

• 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

• 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

• Understanding of Gateway appliances and associated software

• Knowledge of secure communications protocols, including messaging platforms such as XMPP

• 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.