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ASSYSTEM

Engineering services for design, construction, commissioning

Senior Process Engineer

Thermal & Fluids EngineeringConfirmed live in the last 24 hours
Full-timeDerby, UKNo salary listed

About the Job

Requirements

  • Background in the nuclear sector or regulated industries such as thermal power generation, oil and gas.
  • Knowledge of steam turbines, condensers, feedwater heaters, pumps, and piping systems.
  • Experience from Front-End Engineering Design (FEED) to detailed design and Engineering, Procurement, and Construction (EPC) delivery.
  • Skill in developing procurement specifications and working with suppliers.
  • Familiarity with UK Health and Safety regulations, safety systems, and Hazard and Operability Studies (HAZOP).
  • Understanding of ASME, European, and UK standards.
  • BPSS and Security Check (SC) are required.
  • Ability to travel to company offices and customer sites within the UK.

Responsibilities

  • Ensure supplier deliverables meet requirements and challenge designs where necessary.
  • Create and review Process Flow Diagrams, Piping and Instrumentation Diagrams, layout drawings, component sizing calculations, and specifications.
  • Conduct and review studies and design documents to support optioneering and decision-making.
  • Develop and review functional and design requirements.
  • Integrate Turbine Island design into the broader power plant.
  • Provide technical expertise for Turbine Island interfaces and stakeholder activities.
  • Support design reviews and HAZID/HAZOP studies, and ensure adherence to Health and Safety policies.
  • Work with safety teams on nuclear safety licensing and environmental permitting.
  • Support the design of complex thermal and fluid systems for the Small Modular Reactor (SMR) project.
  • Generate static and transient flow and thermal analyses using software tools and methods to demonstrate system performance.
  • Provide analysis and calculation support across Turbine Island systems and contribute to an internal centre of excellence for analysis and calculation methodology.

Desired Qualifications

  • Experience or awareness of systems engineering.

About the Company

ASSYSTEM

Engineering services for design, construction, commissioning

Assystem provides engineering services for complex projects, covering design, construction, supervision, commissioning, and operation, with a strong focus on the nuclear and energy sectors. Its approach combines multidisciplinary engineering teams and project-management capabilities to move projects from initial concept through to operation. The company differentiates itself through a long track record, strategic acquisitions (including Alphatem in 1995 and Mactech Energy Group in 2025) and an early public offering in 2013, which have expanded its capabilities and market reach in the energy and nuclear fields. Its goal is to be a leading, reliable partner for clients by delivering end-to-end engineering services and helping them meet safety, performance, and regulatory requirements across the project lifecycle.

Company size
5,001-10,000
Company stage
IPO
Headquarters
Paris, France
Founded
1966

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