Senior Process Engineer

About Assystem

Assystem is among the top three independent nuclear engineering firms worldwide, with over 60 years of experience in highly regulated sectors. We support public and industrial stakeholders in the execution of complex, strategic infrastructure projects, subject to high safety and security requirements.

With 8,000 experts across 13 countries, we intervene across the entire project lifecycle in engineering, project management, and digital solutions.

Join the Fusion and Modular Nuclear Business Unit. The Process Engineer will support the design of complex thermal and fluid systems for the SMR project. The role provides analysis and calculation support across Turbine Island systems and contributes to an internal centre of excellence for analysis and calculation methodology. You will generate static and transient flow and thermal analyses using various software tools and methods to demonstrate system performance.

• Intelligent Customer
  :
  Ensure supplier deliverables meet requirements and challenge designs where necessary.
• Design Development
  :
  Create and review Process Flow Diagrams, Piping & Instrumentation Diagrams, Layout Drawings, Component Sizing Calculations, and Specifications.
• Optioneering & Decision Making
  :
  Conduct and review studies and design documents.
• Systems Engineering
  :
  Develop and review functional and design requirements.
• Integration
  :
  Seamlessly integrate Turbine Island design into the broader power plant.
• Technical Support
  :
  Serve as the go‑to expert for Turbine Island interface and stakeholder activities.
• Safety & Compliance
  :
  Support Design Reviews, HAZID/HAZOP studies, and ensure adherence to H&S Policies.
• Liaison
  :
  Work with safety teams on nuclear safety licensing and environmental permitting.

• 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 and numerous career opportunities.
• 70% of our managers are promoted internally.
• Hybrid work: 3 days remote per week.

• Experience
  :
  Background in the nuclear sector or regulated industries such as thermal power generation, oil and gas.
• Technical Expertise
  :
  Knowledge of steam turbines, condensers, feedwater heaters, pumps, and piping systems.
• Project Delivery
  :
  Experience from FEED to detailed design and EPC delivery.
• Procurement & Supplier Liaison
  :
  Skilled in developing procurement specifications and working with suppliers.
• Communication
  :
  Excellent skills for interacting with internal and external stakeholders.
• Safety Knowledge
  :
  Familiarity with UK Health and Safety regulations, safety systems, and HAZOP.
• Codes & Standards
  :
  Understanding of ASME, European, and UK standards.
• Systems Engineering
  :
  Experience or awareness desirable.

• Security
  : BPSS and SC required.
• Travel Ready
  :
  Ability to travel to Assystem offices and customer sites within the UK.
• Global Impact
  :
  Support major UK and international Nuclear Clients with key work packages.

Ready to make a difference in the nuclear engineering world? Join us and be part of the future of nuclear and fusion innovation.

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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.