Application Security Architect

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, please reply back with a copy of your updated CV