I&C Design Engineer - HVAC Systems

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

Job summary

Join a forward-thinking company leading the charge in the global energy transition. As part of the HVAC Systems team, you'll play a pivotal role in designing and delivering high-quality HVAC solutions for nuclear power projects. With a focus on innovation and excellence, you'll collaborate across disciplines to ensure safety and compliance while enhancing your career in a dynamic environment. This is your chance to contribute to significant energy infrastructure projects and help shape a sustainable future for the UK. Embrace the challenge and make a real impact in the world of clean energy!

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

Generous employee referral scheme

Qualifications

• 5+ years of experience in HVAC system design.
• Proficient in thermal-hydraulic calculations and system sizing.
• Strong skills in technical documentation and configuration control.

Responsibilities

• Review and update system documentation for safety compliance.
• Perform thermal-hydraulic calculations and size components.
• Collaborate with multidisciplinary teams for project success.

Skills

HVAC system design

thermal-hydraulic calculations

I&C logic & HMI design

technical documentation

cross-discipline coordination

Education

Degree in Nuclear Engineering

Degree in Mechanical Engineering

Degree in Process Engineering

Job description

️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 thetop three largest nuclear engineering companies worldwideand 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

My profile

• 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
• 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

Shape the Future of Clean Energy with Us!

JoinAssystem’s expert teamand contribute to one of the mostsignificant energy infrastructure projects in the UK. Your expertise inmechanical equipment deliverywill play a key role in ensuring thesuccess 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
• 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.

Are you a prospective or recent graduate?

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!