Salary: £70,000 - 70,000 per year Requirements: Experienced Security Application Architect Strong design and development background Proven experience with Gateway technologies Knowledge of Infrastructure & Platforms (VMware/vSphere, RHEL, Windows Server) Familiarity with Trellix SIEM platforms Understanding of Identity & Directory Services (Active Directory, DNS, LDAP, LDIF) Experience with Gateway appliances and associated software Proficient in Email, Chat, and File standards Knowledge of Web and Chat protocols (XML, JSON schema, TLS server/client certificates) Understanding of digital file format handling Familiarity with Linux & Networking Proficient in Shell scripting and REGEX Fluent in Firewall technologies Self-motivated and able to work autonomously Strong stakeholder engagement skills Ability to communicate effectively at technical and leadership levels Willingness to travel weekly within the South/Southwest region at short notice Responsibilities: 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 Ensure ongoing availability, resilience, and security compliance Provide architectural guidance during troubleshooting and incident resolution Act as a key technical interface between engineering delivery and operational support teams Technologies: Active Directory Architect Firewall Support JSON LDAP Linux RHEL Security VMware Web Windows XML More: We are a forward-thinking defense technology company located in Bracknell, seeking an experienced Security Application Architect to support the delivery and ongoing evolution of a secure Gateway capability for a strategic UK defense customer. This role offers a competitive salary in the range of £65-70k per annum, along with an attractive benefits package. Our dynamic team is dedicated to delivering resilient and compliant solutions in a high-security, mission-critical environment, and we value self-motivated professionals ready to drive change and technical direction. last updated 8 week of 2026