⚡️💡 About Assystem
Assystem is an international engineering and project management group accelerating the energy transition worldwide. Our 8,000 Switchers combine decades of engineering expertise with digital innovation to deliver complex, safety-critical infrastructure. In the UK, we play a key role on landmark programmes including Hinkley Point C, Sizewell C and emerging Small Modular Reactor developments, supporting the delivery of secure, low-carbon energy for the future.
🤝 Why Join the Community of Switchers?
You will be joining one of the three largest nuclear engineering companies in the world, working at the heart of the UK’s most significant energy programme. Assystem offers exposure to world-class projects, long-term career stability, and the opportunity to work alongside highly experienced engineers and delivery teams. Your future team values collaboration, practical problem solving, and engineers who want to make a real impact on site.
🚀 This is a hybrid role, 2-3 days in the office
You will support turbine system engineering activities across operational nuclear power plant assets. The role focuses on technical oversight, performance analysis, and engineering documentation for rotating plant. You will collaborate with multidisciplinary teams to resolve complex turbine and thermal system challenges.
⚙️ Lead engineering activities related to steam turbines, governors, valves, and auxiliary systems
🔍 Provide technical oversight, troubleshooting, and performance analysis of turbine plant
📊 Develop and review specifications, calculations, reports, and modification proposals
🔧 Support maintenance strategies and engineering improvements for rotating plant systems
🤝 Collaborate with site engineering teams, safety specialists, and external suppliers
📄 Ensure engineering documentation aligns with regulatory and operational requirements
📈 Communicate technical decisions clearly to engineering and operational stakeholders
Nuclear experience is not essential, but is of course welcome. If you have worked within a highly regulated environment, your skills and approach are highly transferable and of strong interest to us.
We also recognise that the perfect candidate rarely exists. If you feel you meet around 80% of the criteria and are motivated to develop further, we would strongly encourage you to apply.
🎓 Bachelor’s degree or HND in Mechanical or related engineering discipline
🛠️ Minimum eight years engineering experience within complex industrial environments
⚡ Experience with thermal power systems including steam turbines and associated equipment
🏭 Background within nuclear, power generation, oil and gas, or similar industries
📘 Strong knowledge of turbine auxiliaries such as condensers, pumps, and feedwater systems
📑 Experience producing engineering documentation, reports, calculations, and specifications
🧠 Understanding of mechanical plant performance analysis and troubleshooting
🏅 Chartered Engineer status or working towards professional registration desirable
🌟 Ready to Make an Impact?
This is an opportunity to contribute to nationally significant energy infrastructure while developing your technical depth within a globally recognised engineering organisation. If you want real responsibility, exposure to complex mechanical systems, and the chance to grow within one of the world’s leading nuclear engineering companies, this role offers long-term progression and stability.
Benefits include:
🏡 Hybrid Working Opportunity
🕒 Flexible working hours
🛡️ Market Leading Pension scheme (8% company contribution / 4% personal contribution)
🏖️ 25 days’ paid annual leave + bank holidays + option to buy or sell days
💼 Professional fees reimbursed
💰 Employee referral scheme
🤒 Competitive Sick Pay – Support when you need it
🏥 Income Protection & 3x Salary Death-in-Service Cover
💪 Free Digital Gym Access – Expert-led fitness classes
📞 24/7 Employee Support Line – Mental health, financial & legal help
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.
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.
8,000 switchers, spread in 13 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.
59 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, SNCF...
Assystem is ranked in the Top 3 companies in the nuclear energy sector.
