Today, Assystem is among the top three independent nuclear engineering firms worldwide. With over 60 years of experience in highly regulated sectors, the group supports public and industrial stakeholders in the execution of complex and strategic infrastructure projects, subject to high safety and security requirements.
Assystem mobilizes 8,000 experts in 13 countries and intervenes across the entire project lifecycle, in engineering, project management and digital solutions.
Job Description🚀 These opportunities are suited to candidates within commuting distance of Bridgwater or Bristol, depending on role requirements.
We are seeking Mechanical Engineers across Graduate, Engineer, Senior, Lead and Principal levels.
You will support the delivery, commissioning and operational readiness of critical nuclear mechanical systems.
🔧Deliver engineering solutions across mechanical, piping, HVAC and process systems
⚙️Support commissioning, testing and validation of mechanical systems
🏗️Contribute to construction, installation and equipment engineering activities
🚀Support system turnover, handover and operational readiness programmes
🔍Resolve technical issues, site queries and engineering challenges
🤝Coordinate contractors, suppliers and multidisciplinary project stakeholders
📋Review technical documentation, design changes and construction modifications
🛡️Ensure compliance with nuclear safety, quality and regulatory requirements
🔗Manage interfaces across engineering, construction and commissioning teams
📈Support major project milestones through to operational readiness
🎓Mechanical Engineering degree or relevant technical qualification and experience
⚙️Experience in mechanical systems, equipment or engineering delivery
🔧Background in piping, HVAC, rotating equipment or pressure systems advantageous
🚀Commissioning, testing, installation or construction experience highly valued
🏗️Experience delivering complex engineering or infrastructure projects
🛡️Experience working within regulated or safety-critical environments
🤝Strong communication and stakeholder management capabilities
🔍Excellent technical problem-solving and analytical skills
📋Commitment to quality, safety and engineering excellence
⚡Nuclear, energy, defence or major infrastructure experience advantageous
🌟 Build Your Future in Nuclear Engineering
Whether you are beginning your engineering career or bringing decades of specialist experience, this is an opportunity to contribute to one of the UK's most significant infrastructure projects. Join a global engineering community, work on complex nuclear systems and build a career around missions that will have an impact for generations.
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
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.
Skills Required
- Mechanical Engineering degree or relevant technical qualification and experience
- Experience in mechanical systems, equipment, or engineering delivery
- Strong communication and stakeholder management capabilities
- Excellent technical problem-solving and analytical skills
- Commitment to quality, safety, and engineering excellence
- Background in piping, HVAC, rotating equipment, or pressure systems
- Commissioning, testing, installation, or construction experience
- Experience delivering complex engineering or infrastructure projects
- Experience working within regulated or safety-critical environments
- Nuclear, energy, defence, or major infrastructure experience
What We Do
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. 7,000 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.
