Process Design Engineer (Fluid Systems)

⚡️💡 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 revolutionizing 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

This role supports process design and integration for fluid systems in a major nuclear programme.

You’ll ensure process documentation and calculations meet strict safety and performance requirements.

Your future team works across mechanical, I&C, and safety disciplines to deliver compliant, optimised system designs.

Key responsibilities include:

• Develop and maintain system documentation for fluid process systems
• Perform thermal-hydraulic calculations using both in-house and commercial tools
• Analyse and integrate input data and requirements from multiple disciplines
• Ensure compliance with safety, environmental and operational constraints
• Engage with stakeholders including civil, layout, I&C and procurement teams
• Support development of technical specifications for procurement
• Review and contribute to system modifications and engineering change processes
• Participate in experience-sharing and process improvement initiatives

🛠 Essential Skills

• Degree in Chemical or Process Engineering (or Mechanical with fluid systems focus)
• 3–5 years' experience in fluid systems design or process engineering
• Skilled in thermal-hydraulic modelling and system performance analysis
• Understanding of safety, environmental, and operational constraints
• Ability to manage technical documentation and system design records
• Confident working with multidisciplinary teams and stakeholders
• Proficient in Microsoft Office and engineering documentation tools

✔️ Desired Skills

• Familiarity with nuclear system process design and classification
• Experience working on regulated infrastructure or industrial sites
• Knowledge of P&IDs and process documentation tools
• Exposure to I&C integration within process systems

🌟 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
• Flexible working
• Employee referral scheme

ASSYSTEMIND3

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.