Job Description Fluid Systems Engineer - Submarines Derby/Hybrid (Min. 3-days in office) Full time An opportunity has arisen for a Fluid Systems Engineer (FSE) to join our Services Systems department at Rolls-Royce Submarines (RRSL) in Derby. The Current Class Systems (CCS) team are responsible for maintaining key safety, design, and operational documentation for in-service submarines, as well as providing responses to technical queries relating to the in-service submarine flotilla. The role of a FSE is integrating individual components into a reliable and functional system, therefore we often we act as an integrator; combining the deep technical knowledge of different disciplines to form a well-balanced justification for continuous operation of submarines at-sea. Why Rolls-Royce? Rolls-Royce is one of the most enduring and iconic brands in the world and has been at the forefront of innovation for over a century. We design, build and service systems that provide critical power to customers where safety and reliability are paramount. We are proud to be a force for progress, powering, protecting and connecting people everywhere. We want to ensure that the excellence and ingenuity that has shaped our history continues into our future and we need people like you to come and join us on this journey. Current Class Systems, Services will provide an environment of caring and belonging where you can be yourself. An inclusive, innovative culture that invests in you, gives you access to an incredible breadth and depth of opportunities where you can grow your career and make a difference. The role of FSE is unique since it provides an opportunity to work across multiple disciplines and generate a broad understanding of how the Nuclear Steam Raising Plant (NSRP) functions. The team you will be joining has a diverse range of experience; this provides an opportunity to learn from senior engineers as well as mentor aspiring engineers who are earlier in their career. The role is based in Derby, but the work often presents the opportunity for travel around the UK to different MoD sites. What we offer: We offer excellent development opportunities, a competitive salary, and exceptional benefits. These include bonus, employee support assistance and employee discounts. Your needs are as unique as you are. Hybrid working is a way in which our people can balance their time between the office, home, or another remote location. It’s a locally managed and flexed informal discretionary arrangement. As a minimum we’re all expected to attend the workplace for collaboration and other specific reasons, on average three days per week. What you will be doing: With this attractive opportunity you will get a chance to: Generate responses to in-service submarine technical queries by working with teams that have a deep technical knowledge in a range of subjects. Update and improve nuclear safety case documentation to provide an improvement submarine capability and availability. Read and interpret Piping & Instrumentation Diagrams (P&ID) and complete fluid systems design calculations to verify fluid system performance. Interface directly with the Rolls-Royce Site Offices (Devonport, Barrow and Faslane) and provide advice to expedite submarine build and maintenance activities. Who we’re looking for: At Rolls-Royce we put safety first, do the right thing, keep it simple and make a difference. These principles form the behaviours that guide us and are an essential component of our assessment process. They are the fundamental qualities that we seek for all roles. To be successful in this role you will need to: Be qualified to at least degree level in a relevant (engineering) discipline. Understand nuclear safety case methods, principles, structures and management processes. Understand Fluid Dynamics and Thermodynamics to aid in basic analytical problem solving. Have had previous experience with requirements capture and basic task planning. Confidently and pro-actively engage within internal and externals stakeholders. We are an equal opportunities employer. We’re committed to developing a diverse workforce and an inclusive working environment. We believe that people from different backgrounds and cultures give us different perspectives. And the more perspectives we have, the more successful we’ll be. By building a culture of respect and appreciation, we give everyone who works here the opportunity to realise their full potential. Learn more about our global Inclusion Strategy To work for the Rolls-Royce Submarines business an individual has to hold a Security Check clearance. Rolls-Royce will support the application for Security Clearance if you do not currently already have this in place. Due to the nature of work the business conducts and the protection of certain assets we can only progress applications from individuals who are a UK national or, in MoD approved cases, a dual national. LI-MM1 Job Category Mechanical Systems Posting Date 07 Jul 2025; 00:07 Posting End Date 14 Jul 2025