Salary: £15,000 - 15,000 per year Requirements: Strong defence sector background with experience in security frameworks such as ISO27001, IS1&2, NIST SP 800-53, and others. Proven track record of delivering security designs through accreditation into operational support. Familiarity with large-scale, complex systems and layered security architectures. Must be eligible for UK Security Clearance. Right-to-work checks required prior to engagement. Responsibilities: Develop and deliver security architecture and documentation for complex systems. Provide security guidance across engineering decisions and ensure compliance with standards. Support accreditation processes and maintain security assurance throughout the project lifecycle. Collaborate with design and test teams to ensure secure implementation and integration. Hands-on involvement in Model-Based Systems Engineering and open architecture development. Technologies: Support Security More: We’re looking for an experienced Security Engineer to join a major defence project in Cardiff for a contract role lasting 6 months, evaluated as Outside IR35. We offer a competitive daily rate of £595. Join our team and contribute to cutting-edge security initiatives. last updated 23 week of 2026