Assystem is a global leader committed to accelerating the energy transition. With 7,500 employees across 12 countries, we tackle the monumental task of switching to low‑carbon energy. Our 55+ years of experience in highly regulated sectors ensure we deliver top‑notch engineering, project management, and digital solutions.
Job Description
Join the Fusion and Modular Nuclear Business Unit!
The Mechanical Engineer will support the design of advanced thermal and fluid systems for the Fusion and Modular business unit. The role will provide analysis and calculation support across all Cooling Water Island Systems and will contribute to an internal centre of excellence for analysis and calculation methodology. This innovative project aims to deliver commercially viable solutions.
Key Responsibilities
* Analyzing and calculating support for Cooling Water Island Systems
* Contributing to a centre of excellence for analysis methodologies
* Generating static and transient flow and thermal analyses using various software tools
Additional Tasks
* System design and integration
* Producing, reviewing, and updating system documentation
* Performing analysis to define system control philosophy
* Sizing of components
* Conducting thermal‑hydraulic calculations and modelling
* Formulating equipment specifications
Why Join the Community of Switchers?
* Over 55 years in nuclear engineering.
* Ranked among the top 3 largest nuclear engineering companies.
* Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
* Ongoing training with numerous career opportunities.
* 70% of our managers are promoted internally!
* Hybrid work: 1‑2 days remote per week.
Qualifications
* Minimum 2:1 BEng in Mechanical Engineering or equivalent.
* Relevant senior engineering experience in sectors such as offshore, renewables, nuclear, or other highly regulated industries.
* Solid background in mechanical and structural engineering.
* Proficient with CAD software: skilled in Autodesk Inventor, AutoCAD, and/or Catia.
* Strong mathematical skills: experienced with MathCAD.
* Skilled in producing technical reports: expertise in design and substantiation reports, assembly procedures, etc.
* Knowledge of manufacturing processes: understanding of welding, machining, etc.
* Experienced with the engineering design cycle from concept to manufacture.
* Familiar with European and offshore standards: experience with Eurocode 3 and DNV.
* Master’s degree is a plus.
* Skilled in checking and approving engineering CAD assemblies and drawings.
* Proficient in verifying engineering documentation: manual calculations, reports, etc.
* Excellent finite element analysis skills: in‑depth knowledge of ANSYS Workbench is desirable.
* Experienced in non‑linear and fatigue FEA: familiar with DNV and Eurocodes.
Equal Employment Opportunity Statement
We are committed to equal treatment of candidates and promote, as well as foster, all forms of diversity within our company. We believe that bringing together people with different backgrounds and perspectives is essential for creating innovative and impactful solutions. Skills, talent, and our people’s ability to dare are the only things that matter! Bring your unique contributions and help us shape the future.
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