GCAP Systems Security Engineer

• Lead defined systems security engineering work packages, establishing their scope, activities, dependencies, milestones, and deliverables.
• Work with systems engineering teams to determine the technologies and processes required to meet customer requirements.
• Provide technical leadership in the development of security architectures, security baselines, and proportionate risk‑mitigation strategies, ensuring alignment with system requirements and programme objectives.
• Specify the required behaviour of security controls to be implemented in radar and electro‑optical infrared (EOIR) systems and subsystems.
• Develop and maintain documentation covering functional requirements, design, implementation, integration, verification and qualification documentation.
• Support engineering lifecycle reviews and design assurance processes.
• Provide compliance assessments and evidence against key security functions, controls and designs.
• Plan and coordinate your own work and, where appropriate, the work of others, monitoring progress against agreed schedule, cost and quality objectives.
• Provide technical support to the Product Cyber Reliance management specialist.
• Develop and update product security good practice across a range of disciplines to ensure our products are secure from initial design through to disposal.

• Strong systems engineering background with experience in physical product development (e.g. embedded systems, electronics, hardware‑software integration).
• Experience with requirements and model‑based systems engineering tools (e.g. DOORS, Cameo).
• Strong analytical and problem‑solving skills, with the ability to learn and apply new concepts quickly.
• Effective communication skills, with the ability to explain security concepts risks and decisions clearly to technical and non‑technical stakeholders, and to influence outcomes across engineering teams, customers and suppliers.
• Ability to decompose and allocate system level security requirements to sub‑systems and collaborate with multidisciplinary engineering teams to identify, select, and implement secure hardware and software solutions.

Understanding of Secure by Design principles and their application in product lifecycle development. Familiarity with security and information assurance frameworks (ISO
27001/27004/27005 and NIST Risk Management Framework). The ability to keep abreast of current trends and events relating to security.

This role is subject to pre‑employment screening in line with the UK Government’s Baseline Personnel Security Standard (BPSS). An additional range of Personnel Security Controls referred to as National Security Vetting (NSV) may apply, this could include meeting the eligibility requirements for The Security Check (SC) or Developed Vetting (DV). For more information and guidance please visit:

• Time to Recharge:
  Enjoy generous leave with the opportunity to accrue up to 12 additional flexi‑days each year.
• Secure your Future:
  Benefit from our award‑winning pension scheme with up to 15% employer contribution.
• Your Wellbeing Matters:
  Free access to mental health support, financial advice, and employee‑led networks championing inclusion and diversity (Enable, Pride, Equalise, Armed Forces, Carers, Wellbeing and Ethnicity).
• Rewarding Performance:
  All employees at management level and below are eligible for our bonus scheme.
• Never Stop Learning:
  Free access to 4,000+ online courses via Coursera and Linked In Learning.
• Refer a friend:
  Receive a financial reward through our referral programme.
• Tailored Perks:
  Spend up to £500 annually on flexible benefits including private healthcare, dental, family cover, tech & lifestyle discounts, gym memberships and more.
• Flexible…