Our client, a leading player in the Defence and Security sector, is currently seeking a Product Security Lead to join their team in Marlow on a contract basis.Key Responsibilities:1. Cyber Requirement ImplementationInterpret and implement US Government-flowed cyber and information-assurance requirements across the product lifecycle.Ensure compliance with the following (non-exhaustive) set of standards and contractual flows: DoD 8140.01 (cyber workforce qualification)NIST SP (Apply online only) (CUI protection)DI-IPSC-82249, DISA STIGs, DI-MGMT-82191, DI-MISC-805082. Product and Engineering AssuranceDefine and maintain the programme Cyber Security Plan, including CUI handling, secure development practices and compliance evidence.Lead cyber risk assessments, threat modeling and vulnerability assessments for embedded systems, software, firmware and Special Test Equipment (STE).Guide teams on secure coding, static/dynamic code analysis, secure configuration, hardening baselines, cryptographic controls and data-at-rest/data-in-transit protection.Ensure firmware, embedded applications and STE conform to defined security controls, logging, access control and audit requirements.3. Programme ExecutionOwn the cyber schedule, deliverables and risks within the programme.Drive timely completion of artefacts required for customer acceptance, including SSPs, POAandMs, incident response plans, configuration baselines and security test evidence.Coordinate with US prime/DoD representatives on