Rolls-Royce SMR Limited

Senior Thermofluids Modelling Engineer (Reactor Faults) We are Rolls Royce SMR, leading breakthrough nuclear solutions. This role is part of the Performance & Analysis team, the centre of excellence for engineering analysis used to substantiate performance and safety of the SMR power station. Core Responsibilities Lead a small team to model fluid and thermal systems that extract power from the nuclear core and ensure safe reactor operation. Produce models and analyses demonstrating reactor operation, and work closely with system designers to optimise plant design and safety systems for maximum safety, performance and value for money. Support development and authoring of safety case documentation and contribute to key safety case sections. Collaborate across engineering and non engineering disciplines to define analysis requirements and communicate results. Apply technical expertise to develop capability, mentor staff and lead interfaces with other business areas. Develop robust, automated analysis routes around the analysis codes, primarily using Python on Linux based HPC resources. Benchmark codes against test data and support the design of large scale test rigs where required. Required Qualifications & Skills Strong understanding of fluid dynamics and thermal processes, with experience applying structured, methodical analysis approaches. Hands on experience using industry standard fluids and thermal analysis software; familiarity with nuclear thermal hydraulics tools (RELAP, FLOMASTER, VIPRE, CTF, GOTHIC desirable). Proven ability to develop analysis methods, models and tools, including Python based solutions, to support design and safety case development. Skilled in writing clear, structured analysis reports and contributing to safety case documentation. Experience in verification, validation and uncertainty quantification of analysis models, including benchmarking, and adherence to software QA processes. Knowledge of safety critical plant systems in nuclear, oil & gas or aerospace; nuclear specific knowledge desirable but not essential. Track record of delivering analysis tasks on time, cost and quality, with strong communication and leadership skills. Degree qualified in Engineering, Physics, Mathematics or Computer Science; Chartered Engineer (or equivalent) preferred. Location & Working Arrangements Hybrid working with one of the following primary sites: Derby, Manchester or Warrington. Salary and Package Salary band: £50,650 - £66,500, depending on skills and experience. Potential for starting salary flexibility in exceptional cases. Benefits Performance related bonus 12.5% target opportunity. Benefits Allowance £2,200 per annum for a bespoke package. Pension: 12% employer and 6% employee contributions. Holidays: 28 days plus public holidays, with option to buy or sell up to 4 days. Private Medical Insurance - BUPA single cover. Life Assurance 6 pensionable pay. Home Office Support - £250 one off payment for new starters. Selection Process Closing date: 31 May 2026. Security checks: BPSS clearance, DBS check and basic financial probity check. Equal Opportunities We are an equal opportunities employer and welcome applications from all backgrounds. As a Disability Confident organisation, we are committed to fair and inclusive recruitment practices that allow everyone to thrive.