Application Security Design Engineer

Security Application Design Engineer Onsite in Bracknell Eligible for DV clearance £50-55K per annum + benefits package Join a high-impact engineering team delivering a secure Gateway solution for a major UK defence customer. This is a hands-on Security Application Architect role where you'll design, implement and troubleshoot mission-critical infrastructure in a live, security-sensitive environment. Working alongside senior architects and engineering leads, you'll play a key role in maintaining availability, supporting operational teams, and driving technical change across complex systems. What You'll Be Doing Identify and implement infrastructure and application changes to support Gateway functionality and availability Produce detailed technical designs for change alongside the customer and Programme Manager Work daily with the Solution Owner and Engineering Lead to deliver engineering outcomes Provide technical support to SOC and 3rd Line teams, troubleshooting complex incidents Configure and support Gateway appliances and associated software Maintain high availability, resilience and security posture Your Technical Background You'll bring strong hands-on experience across: Infrastructure VMware / vSphere RHEL & Windows Server Trellix SIEM platforms Linux & Scripting Shell scripting REGEX Firewall configuration Microsoft Stack Active Directory DNS RDS Applications & Protocols LDAP Email, Chat & File standards Web & Chat protocols XML & JSON schema LDIF TLS server/client certificates File type digital formats Gateways Deployment, configuration and support of Gateway appliances and their software What We're Looking For A self-starter comfortable working independently and collaboratively Strong troubleshooting mindset Clear written and verbal communication skills Comfortable interacting with stakeholders at all levels Willing and able to travel weekly within the South / Southwest at short notice If you are interested in discussing this Application Security Design Engineer role further, please reply back with a copy of your updated CV