HVAC Technical Lead - Nuclear - #1721967

️ About Assystem

At Assystem, our mission is to accelerate the energy transition worldwide. Our 7,500 Switchers blend historical engineering expertise with cutting-edge digital technologies to drive this change. Join us in revolutionising the energy sector and making a significant global impact.

Why Join the Community of Switchers?

Be part of one of the top three largest nuclear engineering companies globally. At Assystem, you’ll contribute to groundbreaking projects that push the boundaries of innovation and engineering excellence. Join a community committed to driving forward the future of energy.

The Job Mission
You’ll play a critical role in technically overseeing HVAC contracts for major nuclear infrastructure.
This position supports a key handover phase, requiring precision and multi-stakeholder coordination.
Your future team delivers essential systems on one of the UK’s most ambitious energy projects.

Your missions will include:

• Overseeing HVAC equipment contracts with focus on the handover phase.


• Representing the HVAC team in meetings with NNB and suppliers.


• Reporting fortnightly on technical open points post-handover.


• Monitoring contractor deliverables like seismic notes and HVAC reports.


• Tracking HVAC milestones from design handover to manufacturing start.


• Coordinating and assessing Contractor Change Requests (CCRs).


• Managing modification processing and generating progress reports.


• Updating HVAC database and issuing Change Transfer Sheets (CTS).

Essential Skills and Qualifications

• Degree in Mechanical or Nuclear Engineering


• Minimum 3 years’ layout engineering or relevant experience


• Proficient with PDMS, E3D, and Navisworks software


• Strong understanding of HVAC systems and equipment


• Capable of managing workload and delivering to deadlines


• Confident liaising with teams across multiple locations


• Skilled in task prioritisation and stakeholder coordination

️ Desired Skills and Qualifications

• Knowledge of PWR HVAC system design principles


• Understanding of nuclear safety classification


• Experience on EPR projects or operating plants


• Familiar with industrial or nuclear site standards

Why Apply?

Join Assystem and become a key player in delivering critical nuclear projects that shape the future of energy. Embrace this opportunity to excel in a dynamic environment where your expertise and leadership will drive global innovation.

Benefits include:

• Pension scheme (8% company contribution / 4% personal contribution)


• 25 days’ paid annual leave + bank holidays + option to buy or sell days


• Professional fees reimbursed

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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 offers you the opportunity to join our Switch to Grow UK Graduate Scheme, where you’ll gain hands on experience in engineering, digital services, and project management by working on some of the world’s most critical energy projects.

Be part of the challenge of the century; accelerating the switch to low carbon energy!