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ASSYSTEM

Engineering services for design, construction, commissioning

Mechanical Engineer

Design EngineeringConfirmed live in the last 24 hours
Full-timeDerby, UKNo salary listedIn-person

About the Job

Requirements

  • Previous experience in the nuclear sector or other highly regulated industries, such as thermal power generation, oil and gas, or process sectors.
  • Good experience and background in thermal power systems and equipment, such as steam turbines, condensers, feedwater heaters, pumps, and piping systems.
  • Experience developing procurement specifications and working with equipment suppliers.
  • A strong technical background and broad experience in thermal power or similar projects.
  • Ability to identify and manage critical interfaces on major projects.
  • Good knowledge of UK health and safety regulations, safety systems, HAZOP, engineering substantiation, and technical standards.
  • Appreciation and application of ASME, European, and UK codes and standards.
  • A Bachelor's degree or Higher National Diploma in an engineering discipline.
  • CEng in a relevant discipline or working towards professional registration.
  • SC Clearance or the capability to achieve it.
  • Ability to work independently and proactively as part of a team, with good organizational skills and the ability to handle confidential and sensitive nuclear information professionally and in line with export control obligations.

Responsibilities

  • Act as an Intelligent Customer, checking supplier deliverables, including designs against requirements.
  • Develop and check, with support from Senior Engineers, Process Flow Diagrams, Piping and Instrumentation Diagrams, Layout Drawings, Component Sizing Calculations, Component and Equipment Datasheets and Specifications, and other concept or detailed design documents.
  • Develop and check, with support from Senior Engineers, Optioneering Studies or Decision Record Files, Design Descriptions, Requirement Specifications, and other design development activities.
  • Apply Systems Engineering, including developing and reviewing Functional and Design Requirements.
  • Integrate the Turbine Island design into the wider power plant.
  • Interface with the wider Turbine Island team and stakeholders.
  • Attend Design Reviews and HAZID/HAZOP studies with multidisciplinary teams.
  • Participate in nuclear safety licensing, environmental planning and permitting, and other interface activities relevant to the Turbine Island scope.
  • Ensure adherence to company statutory health and safety policies and rules, and compliance with the project and Quality Management System.

Desired Qualifications

  • Experience in similar roles, preferably with specific emphasis on FEED through to detailed design and EPC delivery.
  • Systems Engineering experience or awareness.

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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