Senior Security Engineer

Ready to help shape a first-of-its-kind secure collaboration platform for MOD and industry? We’re looking for a Senior Security Engineer to join a growing Engineering & Architecture capability, delivering a cutting-edge, highly secure environment. This is a rare opportunity to lead security engineering at scale, influence strategy, and embed security-by-design across a complex, classified programme. You’ll play a key role in designing, implementing and governing security capabilities, while mentoring a team and driving best practice across infrastructure, applications, and data. This role is based on site in Farnborough. You do need to hold current DV Clearance. What you’ll be doing: ? Lead the design and implementation of platform-wide security architectures and strategies. Drive secure SDLC practices including threat modelling, misuse cases, and risk analysis. Oversee security operations including vulnerability scanning, penetration testing, and assessments. Manage and optimise security tooling (Firewalls, VPNs, IDS/IPS, EDR). Lead incident response activities, ensuring swift mitigation and root cause analysis. Collaborate across engineering, architecture, and compliance teams to embed security-by-design. What you’ll bring : Strong background in network security, SIEM, IDAM, endpoint protection, and cloud security. Knowledge of threat intelligence, IOC analysis, and detection engineering. Experience in secure SDLC, code review, and threat modelling (incl. misuse cases). Understanding of encryption, authentication, and risk management frameworks. Proven ability to lead, mentor, and influence senior stakeholders. It would be great if you have: Experience working with frameworks such as NIST. Exposure to cloud and container security (AWS, Azure, GCP, Kubernetes). Experience operating in air-gapped or highly restricted environments. Background in Defence or highly classified programmes. Employment Type: Permanent Location: Office based in Farnborough Security Clearance Level :DV Cleared Internal Recruiter: Jane Salary: To 65K Depending on experience. Benefits: 25 days annual leave with the choice to buy additional days, life assurance, pension, flex benefit, 5400 car allowance. Loved reading about this job and want to know more about us? Sopra Steria’s Aerospace, Defence and Security business designs, develops and deploys digital solutions to Central Government clients. The work we do makes a real difference to the client’s goal of National Security, and we operate in a unique and privileged environment. We are given time for professional development activities, and we coach and mentor our colleagues, sharing knowledge and learning from each other. We foster a culture in which employees feel valued and supported and have pride in their work for the customer, delivering outstanding rates of customer satisfaction in the UK’s most complex safety- and security-critical markets. Why join us? You’ll be part of a team delivering something genuinely new and impactful within UK Defence, with clear scope to shape security strategy and influence how secure platforms are built in the future. We offer long-term career development, exposure to complex programmes, and the opportunity to lead and grow a high-performing security function. If you're DV cleared and ready to take on a hands-on leadership role in a mission-critical environment, we’d love to hear from you.