HVAC Design Engineer

About Assystem

At Assystem, our mission is to accelerate the energy transition worldwide. To achieve this, our 7,500 Switchers combine historical engineering expertise and project management with digital technologies. As one of the top three largest nuclear engineering companies globally, we are committed to delivering innovative solutions that shape the future of clean energy.

Why Join the Community of Switchers?

When you join Assystem, you become part of one of the world’s top three nuclear engineering companies. You’ll work on major nuclear projects like Hinkley Point C, supporting the clean energy transition. Our collaborative and forward-thinking environment provides opportunities to develop your expertise and make a real impact in the industry.

The Job Mission

As an HVAC Design Engineer, your role is to support and lead system design and integration within the Hinkley Point C (HPC) project, ensuring full compliance with engineering rules, processes, and safety requirements.

Your future team will work across disciplines to deliver innovative HVAC solutions.

• System design and integration for the HPC project
• Analyse and verify input data, lessons learned, and component sizing
• Perform thermal-hydraulic calculations using specialised tools
• Support procurement with technical specifications and supplier oversight
• Conduct technical reviews and ensure documentation meets high standards
• Manage system modification requests and propose technical solutions
• Attend kick-off meetings and provide support during system handover reviews
• Collaborate with stakeholders to ensure successful system delivery

Required Skills and Qualifications (Essential)

• Degree in Mechanical Engineering
• Experience in design engineering of HVAC in an industrial setting
• Experience working on industrial or operational sites
• Ability to produce high-quality documentation and meet deadlines
• Excellent interpersonal and communication skills
• Proactive approach to technical challenges

Desired Skills

• Experience in the nuclear industry or related fields
• Knowledge of EPR system design principles

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

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.