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ASSYSTEM

Engineering services for design, construction, commissioning

Principal Mechanical Engineer

Design EngineeringPosted on Nov 1
Full-timeWarrington, UKNo salary listed

About the Job

Requirements

  • Strong previous experience in highly regulated industries like nuclear, thermal power generation, or oil and gas.
  • Expertise in thermal power systems and equipment, from steam turbines to pumps, with a keen understanding of nuclear power plant operations.
  • Proficiency in optioneering and conducting studies to evaluate viable options, backed by a track record of crafting compelling ALARP and BAT arguments.
  • Experience in mentoring and developing junior staff, along with a proven history of leadership in managing small teams.
  • Exceptional communication skills for seamless interaction with internal and external stakeholders.
  • Familiarity with ASME, European, and UK codes and standards, coupled with a deep understanding of Product Safety Legislation.
  • Appreciation for requirements management and systems engineering principles.
  • Results-oriented with the ability to work both independently and collaboratively, coupled with strong organizational skills.
  • British National with eligibility for obtaining and maintaining full UK security clearance.
  • UK security clearance criteria and eligibility for full security clearance

Responsibilities

  • Spearheading the delivery of cutting-edge power station systems.
  • Taking charge of optioneering studies to pinpoint the ultimate solution that perfectly aligns with client objectives.
  • Leading a dynamic team in crafting and refining essential design documents, from Process Flow Diagrams to Equipment Datasheets, ensuring precision and excellence at every step.
  • Directing the development of Design Description Documents and Requirement Specifications, driving innovation and efficiency in every design aspect.
  • Seamlessly integrating developed systems into the broader plant infrastructure for optimal performance and functionality.
  • Serving as the technical guru for designated scopes, guaranteeing top-notch expertise and oversight.
  • Chairing exhilarating Design Reviews and leading HAZID/HAZOP studies with diverse, multidisciplinary teams to ensure safety and excellence in every project facet.
  • Enforcing strict adherence to company statutory H&S Policies and regulations, while ensuring unwavering compliance with project and Quality Management System standards.

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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