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Assystem Graduate Mechanical Engineer role develops graduates through mechanical design, engineering assessments and technical problem-solving on live Defence, New Build, Fusion and Modular Nuclear projects.
Meeting the challenges of the energy transition and strengthening our sovereignty are among the key priorities of the 21st century. At the heart of these challenges, Assystem supports its clients in delivering their most strategic projects. To achieve this, our 8,000 Switchers leverage their expertise in engineering, project management, and digital solutions.
Operating in 13 countries (Europe, the Middle East, Central Asia, and North America), we contribute to the development of new nuclear power generation capacities, the operational maintenance of existing facilities, and the design and delivery of critical infrastructure, particularly in the defence sector.
Your Future Team
Are you a Mechanical Engineering graduate who is curious about how things are designed, built and improved? Join our two-year Graduate Programme and turn what you have learned into experience on live projects across Defence, New Build and Fusion and Modular Nuclear. You’ll work alongside experienced engineers, build your confidence and develop the skills to shape a long-term career in engineering.
Job Description
Your Responsibilities
From day one, you get involved in real engineering challenges. With support from mentors and technical experts, you build broad experience across teams and projects before developing deeper knowledge in the areas that interest you most.
Your main responsibilities include:
Support mechanical design, specification and engineering assessment activities.
Prepare calculations, technical notes, reports and engineering documentation.
Take part in design reviews, technical meetings and multidisciplinary collaboration.
Use engineering tools and apply relevant standards with guidance from experienced colleagues.
Help teams identify and resolve technical issues, risks and interfaces.
Why Join Us?
🚀 Give purpose to your career by joining a company that contributes sustainably to the production of low-carbon, competitive, and sovereign energy.
🌍 Explore a wide variety of projects and careers within a strong group, ensuring stimulating and diverse assignments throughout your career.
📚 Develop your skills through an ambitious training program: 5,000 employees trained and more than 100,000 training hours delivered each year.
Your Strengths and Requirements for Success
We’re looking for graduates who:
Have, or expect to achieve, a degree in Mechanical Engineering, Mechanical Design Engineering or a closely related discipline.
Are curious, motivated to learn and ready to put ideas into practice.
Communicate clearly and enjoy working with others.
Can think logically, solve problems and pay attention to detail.
Are excited by the opportunity to build a career on complex projects.
Eligibility Requirements:
To join our Graduate Scheme, you must be a UK sole national and a UK resident, as this is required for the type of work we do. You’ll also need to be able to obtain a minimum of Baseline Personnel Security Standard (BPSS) clearance, with some roles requiring higher levels of clearance.
As part of the programme, you should also be willing to relocate or travel within the UK, and we’ll provide relocation support where needed.
How to apply
Apply directly through the company website. Clicking the link below will open the application page in a new window.

Location: Courbevoie , France
Industry: Nuclear Energy
Assystem, one of the world's leading independent nuclear engineering companies, is committed to accelerating the energy transition. We see ourselves as an activist in the development of nuclear energy, convinced that it is an essential part of the fight against climate change. 7,500 switchers, spread in 12 countries in Europe, Asia, Africa and the Middle East are working every day to make the energy switch by accelerating the development of nuclear and renewable energies, power grids, clean hydrogen projects and low-carbon transport. We design and supervise major projects through our engineering activities and accelerate our customers' digital transformation. We also develop new solutions to build faster and improve the performance of complex infrastructures. 55 years of experience have made Assystem a key partner of the world's largest industrial groups: CEA, EDF, ENEC, Enedis, Engie, Framatome, ITER, K.A. CARE, Naval Group, NICDC, Orano, RATP, Rolls Royce, Royal Commission, Sellafield, SGP, SNCF... Assystem is ranked in the Top 3 companies in the nuclear energy sector.
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