Job Title: Principal Mechanical Engineer Location: Portsmouth Naval Base working a hybrid pattern We offer a range of hybrid and flexible working arrangements. Please speak to your recruiter about the options for this particular role Salary: Circa £54,500 dependent on experience + bonus scheme 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: You will provide comprehensive mechanical engineering support across a wide range of platform systems, including fluid, hydraulic, HVAC, firefighting, propulsion and mechanical drive systems. Your role spans multiple programmes, ensuring design integrity, investigating system impacts, and delivering safe, well integrated engineering solutions across diverse naval platforms. Working closely with stakeholders including MOD teams, overseas navies, OEMs and project groups to capture and guide system requirements. lead structured analysis , maintain configuration control , prepare authoritative safety evidence, and act as a primary WTA technical ..... full job details .....