We are seeking an experienced Senior System Security Engineer (SSE) to support cybersecurity engineering activities within BAE Systems Space & Mission Systems (SMS). In this role, you will manage cyber requirements, validate technical security implementations, and support Assessment & Authorization (A&A) activities necessary to achieve and maintain system Authorizations to Operate (ATO). The Engineering, Science and Analysis (ESA) Strategic Capabilities Unit comprises the technical talent and organizational leadership that enables the successful delivery of high-impact discriminating technologies for our customers’ missions. Our collaborative, cross-functional teams are committed to innovation, integrity, continual learning and strong execution. What You’ll Do: • Support development and maintenance of Space Vehicle (SV) Security Architecture, applying systems and cybersecurity engineering best practices. • Develop and document cybersecurity solutions using MBSE tools and established engineering processes. • Translate system level security requirements into component level requirements and ensure integration of appropriate controls. • Assess designs and development activities for compliance with cybersecurity standards and program expectations. • Contribute to threat analyses and help shape security architecture decisions. • Provide security engineering input to Program Protection Plans and related acquisition documentation. • Support Trusted & Assured Microelectronics, Anti Tamper, and Software Security Assurance activities as needed. • Participate in Mission Assurance and engineering reviews, identifying cyber risks and recommending mitigations. • Promote secure by design engineering practices across the program and collaborating closely with systems, hardware, and software teams. • Communicate security considerations to technical leads, program management, and customers, including concise briefings and documentation. • Maintain a regular and predictable work schedule. • Establish and maintain effective working relationships within the department, the Strategic Business Units, Strategic Capabilities Units and the Company. Interact appropriately with others in order to maintain a positive and productive work environment. • Perform other duties as necessary. On-Site Work Environment: This position requires regular in-person engagement by working on-site five days each normally scheduled week in the primary work location. Travel and local commute between company campuses and other possible non-company locations may be required. Working Conditions: • Work is performed in an office, laboratory, production floor, or cleanroom, outdoors or remote research environment. • May occasionally work in production work centers where use of protective equipment and gear is required. • May access other facilities in various weather conditions.