I&C Design Engineer - HVAC Systems

Assystem; Bristol; On-site; GBP 45,000 - 75,000; Full time

Job summary

Join a forward-thinking company at the forefront of the energy transition! This role in the HVAC Systems team offers a unique opportunity to contribute to nuclear power plant projects, focusing on high-quality HVAC solutions. With a commitment to innovation and excellence, you'll engage in design, specification, and multidisciplinary coordination, ensuring safety and quality compliance. Enjoy a collaborative environment where your expertise will play a vital role in shaping the future of clean energy in the UK. If you're ready to make an impact, this is the perfect opportunity for you!

Benefits

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

25 days’ paid annual leave + bank holidays

Option to buy or sell leave days

Professional fees reimbursed

Flexible working

Generous employee referral scheme

Qualifications

• 5+ years of experience in HVAC system design and thermal-hydraulic calculations.
• Ability to define system requirements from nuclear safety inputs.

Responsibilities

• Review and update system documentation for safety compliance.
• Perform thermal-hydraulic calculations and size components.

Skills

HVAC system design

Thermal-hydraulic calculations

I&C logic

Technical documentation

Cross-discipline coordination

Education

Degree in Nuclear Engineering

Degree in Mechanical Engineering

Degree in Process Engineering

Job description

Assystem Bristol, England, United Kingdom

Join Assystem and Power the Future of Energy!

At Assystem, we are at the forefront of the global energy transition. Our 7,500 Switchers bring a wealth of engineering expertise to accelerate the world’s journey to a sustainable future. Join us and play a key role in delivering transformative projects that shape tomorrow.

Why Join the Community of Switchers?

Join one of the top three largest nuclear engineering companies worldwide and collaborate with a team that thrives on innovation and excellence. At Assystem, you'll work on critical projects, contributing to a sustainable energy future while growing in your career.

Job Description

The Job Mission

You’ll be a key part of the HVAC Systems team, supporting design activities on a nuclear power plant project. Your future team will focus on delivering high-quality HVAC solutions. This role spans design, specification, and coordination across multidisciplinary functions.

Key responsibilities include:

• Review and update system documentation ensuring safety and quality compliance
• Perform thermal-hydraulic calculations and size components like fans and pipework
• Translate safety inputs into functional and I&C logic requirements
• Support procurement with technical specs and supplier reviews
• Manage configuration and design modifications for stability
• Define I&C test procedures, HMI elements, and control logic
• Provide technical input for commissioning planning and execution
• Collaborate with layout, civil, and safety teams to meet cross-functional requirements

Qualifications

Essential Skills

• Degree in Nuclear, Mechanical, or Process Engineering
• 5+ years’ experience in HVAC system design
• Proficient in thermal-hydraulic calculations and system sizing
• Experience with I&C logic & HMI design
• Strong technical documentation and configuration control skills
• Able to define system requirements from nuclear safety inputs
• Effective in cross-discipline coordination and stakeholder engagement

Desired Skills

• Knowledge of EPR system design and safety classification
• Experience working on nuclear or industrial plant sites
• Skilled in peer reviewing technical I&C documents
• Familiarity with nuclear engineering rules for I&C design

Additional Information

Shape the Future of Clean Energy with Us!

Join Assystem’s expert team and contribute to one of the most significant energy infrastructure projects in the UK. Your expertise in mechanical equipment delivery will play a key role in ensuring the success of SZC and the UK’s energy future.

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
• Flexible working
• Generous employee referral scheme

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.