⚡️💡 About Assystem
Assystem is a global leader in engineering, dedicated to accelerating the energy transition. In the UK, we’re powering progress on landmark projects like Hinkley Point C, Sizewell C, and next-generation Small Modular Reactors (SMRs). Our 8000 Switchers blend deep engineering know-how with cutting-edge digital tools to help build a low-carbon world - faster, cleaner, and smarter.
🤝 Why Join the Community of Switchers?
Becoming a Switcher means joining one of the top three nuclear engineering companies in the world. You’ll work on technically complex projects that shape the UK’s energy future while gaining opportunities to grow your expertise in a fast-paced, collaborative environment.
🚀 This is a hybrid role based in Bridgwater, requiring 3 - 4 days per week on site, with support available for those looking to relocate closer to the project.
As a Mechanical HVAC Engineer, you will support the delivery of heating, ventilation, and air conditioning systems across a major construction programme.
🌬️ Support installation of heating, ventilation, and air conditioning systems on site
🔧 Provide technical support to construction teams to resolve installation issues
📄 Review engineering drawings and specifications for site suitability
🔍 Identify and report installation or documentation issues promptly
🤝 Liaise with design and engineering teams to resolve technical queries
📊 Support tracking of site issues and contribute to performance reporting
🛠️ Assist in reviewing and implementing engineering changes on site
📈 Help identify recurring issues and suggest practical improvements
⚙️ Ensure work aligns with safety, quality, and project requirements
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
🎓 Degree in Mechanical Engineering or related discipline
🏗️ Experience working with HVAC systems within construction projects
📚 Understanding of mechanical building services or industrial systems
🧠 Strong problem-solving skills with a practical engineering mindset
🗣️ Ability to communicate clearly with site and engineering teams
🔍 Good attention to detail when reviewing drawings and documentation
🤝 Collaborative approach with willingness to learn and develop
⏱️ Ability to manage workload in a fast-paced site environment
🌟 Ready to lead the way on one of the UK's biggest clean energy builds?
Join a team where your skills will help power the future. Bring your mechanical expertise—and we’ll provide the platform to make your mark.
Benefits include:
🏡 Hybrid Working Opportunity
🕒 Flexible working hours
🛡️ 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
NOTICE TO CANDIDATES ON RECRUITMENT FRAUD - We are committed to safeguarding candidates from fraudulent activity associated with our recruitment process. Please note that we will never offer specialist CV writing services, request payment or ask for sensitive personal information during the recruitment process.
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.
