HVAC Design Engineer

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.

🚀 Join the Fusion and Modular Nuclear Business Unit! 🚀Reporting to the Turbine Island Lead, the Senior Mechanical Engineer shall be responsible for various Turbine Island design development activities. The Senior Mechanical Engineer shall work closely with multidisciplined teams and the supply chain to help deliver the Turbine Island design. 

Your mission:

• Serve as the key liaison between HVAC design teams and construction/installation teams, ensuring seamless collaboration and delivery.
• Lead the development and review of HVAC designs, guaranteeing precision, quality, and alignment with detailed engineering specifications.
• Conduct thorough technical assessments to ensure full compliance with industry standards and project requirements.
• Evaluate and validate contractor deliverables, including drawings, method statements, and test plans, to uphold project excellence.
• Drive the integration of HVAC systems within wider mechanical, electrical, and building services frameworks.
• Actively contribute to design coordination meetings and multi-disciplinary reviews, fostering alignment across all project stakeholders.
• Support risk assessments and safety evaluations, promoting a proactive and safety-first project environment.
• Assist in commissioning activities, ensuring HVAC systems perform efficiently and meet design intent.
• Provide expert input on change management, including design updates and configuration control processes.
• Maintain strong, consistent communication with project managers, quality teams, and cross-functional engineering disciplines.

Why Join the Community of Switchers?

• 🌟 Over 55 years in nuclear engineering.
• 🏆 Ranked among the top 3 largest nuclear engineering companies.
• 💼 Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
• 📚 Ongoing training with numerous career opportunities.
• 📈 70% of our managers are promoted internally!
• 🏠 Hybrid work: 1-2 days remote per week.

Essential

• Degree-qualified in Mechanical Engineering, Building Services Engineering, or a related discipline.
• Proven experience in HVAC design or building services engineering, with exposure to system integration in complex projects.
• Strong knowledge of HVAC codes and standards (e.g., ASHRAE, CIBSE, ISO, and relevant local regulations).
• Confident in interpreting technical drawings and specifications, with a keen eye for engineering detail.
• Experience collaborating with contractors and site teams, working effectively across multi-disciplinary environments.
• Excellent communication and teamwork skills, thriving in dynamic, project-driven settings.
• Experience in regulated industries or large-scale infrastructure projects is advantageous, but not essential.

Preferred Skills

• Proficiency in HVAC design software, including Revit, AutoCAD, BIM tools, and load calculation software.
• Solid understanding of HVAC fundamentals, including ventilation, heat load calculations, duct sizing, equipment selection, and system performance analysis.
• Familiarity with commissioning processes and quality assurance practices, ensuring systems meet operational standards.
• Strong analytical and problem-solving skills, with exceptional attention to detail.

Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum SC level.

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.