Job DescriptionFluid Mechanics & Thermofluids Engineers Location: Bristol, Derby or Solihull Rolls-Royce is seeking Fluid Mechanics & Thermofluids Engineers to support a range of current and future opportunities across our Defence business. Our Fluid Mechanics teams are responsible for understanding, analysing and optimising the flow of air, fuel, oil and thermal energy through some of the world's most advanced aerospace propulsion systems. These teams play a vital role in product performance, efficiency, safety and environmental compliance. We are interested in hearing from engineers with experience in aerothermal analysis, thermofluids, thermal systems, fluid mechanics and performance engineering. What you could be working on Aerothermal Engineering Thermofluids Systems Air Systems Fuel and Oil Systems Thermal and Thermo-Mechanical Analysis Performance & Environmental Engineering System Modelling and Simulation Product Verification and Development What we're looking for Mechanical, Aerospace or related Engineering degree (or equivalent experience) Experience in fluid mechanics, thermodynamics, heat transfer or related disciplines Strong analytical and modelling capability Ability to solve complex technical problems within multidisciplinary teams Experience in aerospace, defence or highly regulated industries is advantageous Why join Rolls-Royce? At Rolls-Royce we are proud to be a business that has truly helped to shape the modern world and are committed to always being a force for progress; powering, protecting and connecting people everywhere. By joining Rolls-Royce, you'll have the opportunity to work on world-class solutions, supported by a culture that believes individuality is our greatest strength, and all perspectives, experiences and backgrounds help us innovate and enable our high-performance culture. Apply If you have experience in fluid mechanics, thermofluids, thermal analysis or performance engineering and would like to contribute to future Rolls-Royce Defence programmes, we would be pleased to hear from you. Our vision is to ensure that the excellence and ingenuity that shaped our history continues into our future. Our multi-year transformation programme aims to turn Rolls-Royce into a high-performing, competitive, resilient and growing company. Join us, and it can be your future vision too. Rolls-Royce are committed to being a respectful, inclusive, and non-discriminatory workplace where individuality is valued, diverse perspectives fuel innovation, and everyone can thrive. To work for the Rolls-Royce Defence Early Life Cycle 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.As part of our selection process, candidates in certain locations may be asked to complete an online assessment, which can include cognitive and behavioural aptitude testing relevant to the role. If required, full instructions for the next steps will be provided.Job CategoryMechanical SystemsPosting Date24 Jun 2026; 00:06Posting End Date