Job Title: Senior System Architect – Platform Interface Location: Portsmouth (Broad Oak), Filton, Dorchester, hybrid – 3 days on site – this role will require routine travel to other southern BAE sites within UK and occasionally internationally. Salary: Up to £89, 520 dependent on experience Who we are: Join BAE Systems and you’ll be part of something bigger. As a valued member of our global colleague network, you’ll bring your unique skills and perspectives to help pioneer progress and protect what matters most. You’ll be trusted to play your part in delivering the advanced, technology-led defence, aerospace and security solutions of tomorrow, shaping a safer future, for all of us. From the depths of the ocean, to the far reaches of space, there’s no limit to where a career at BAE Systems could take you. What you’ll be doing: As a Senior Mission System Architect (Platform Interface), you will provide technical leadership for the integration of platform, mission and support systems across future naval platforms. You will define platform-agnostic architectures that enable seamless interaction between propulsion, power, control, combat and auxiliary systems and offboard monitoring. Working within complex system-of-systems environments, you will ensure solutions are safe, resilient, interoperable and aligned with Hybrid Navy strategic objectives. Collaborating with customers, suppliers and engineering teams across BAE Systems and the broader defence enterprise, you will influence strategic direction and deliver future-ready platform integration solutions that support operational performance and long-term capability growth. Core duties: Lead platform interface architecture and integration strategy. Define standards, interfaces and system integration principles. Resolve complex cross-domain integration and interoperability challenges. Embed cyber resilience, safety and assurance into architectural solutions. Support digital ship technologies, automation and control systems. Influence stakeholders on platform integration strategy and delivery. Essential skills: A degree in Engineering (or a related subject) Full membership of an appropriate engineering institution and be a Chartered Engineer (or actively working towards). Extensive experience in maritime systems integration and system-of-systems architecture. Strong knowledge of platform automation, control systems and digital engineering.. Combat System Engineering Team: Within the dynamic and rapidly expanding Naval Ships Combat Systems business, you will form part of a highly skilled team of system architects charged with shaping the future of maritime mission systems. Working across domestic and international programmes alongside enterprise partners, in bringing to bear your specialist expertise, you will ensure that candidate solutions are innovative, future-force-ready, operationally relevant and coherent with customer and business needs. Why BAE Systems? Here you’ll build a career with purpose and limitless possibilities. With lifelong learning and meaningful work, this is a place where you can grow your career with confidence and be empowered to be your best. You’ll be recognised for your contribution and enjoy rewards tailored to what’s most important to you and your family, support for your financial and personal wellbeing, as well as a balanced lifestyle. In an environment embracing sustainable ways of working and with a strong sense of shared purpose, our supportive culture is a place you can feel you belong and proud of the difference you make. A place where everyone can thrive: We’re committed to building an inclusive workplace where everyone feels valued and supported. We know that a diversity of backgrounds, perspectives and experiences strengthens our teams and is vital to the work we do. Please be aware that many roles at BAE Systems are subject to both security and export control restrictions. These restrictions mean that factors such as your nationality, any nationalities you may have previously held, and your place of birth can restrict the roles you are eligible to perform within the organisation. All applicants must as a minimum achieve Baseline Personnel Security Standard. Many roles also require higher levels of National Security Vetting where applicants must typically have 5 to 10 years of continuous residency in the UK depending on the vetting level required for the role, to allow for meaningful security vetting checks. Closing Date:14th October 2026 We reserve the right to close this vacancy early if we receive sufficient applications for the role. Therefore, if you are interested, please submit your application as early as possible. #LI-AP1 #LI-hybrid #combatsystems