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ASSYSTEM

Engineering services for design, construction, commissioning

Principal Mechanical Engineer

Design EngineeringConfirmed live in the last 24 hours
Full-timeWarrington, UKNo salary listedHybrid

About the Job

Requirements

  • Manage and challenge requirements for existing waste containers and interface equipment.
  • Assist with engineering activities as defined by the Engineering Manager.
  • Provide guidance and assurance to Senior Engineers and Designers.
  • Assist in defining product requirements.
  • Guide understanding of tolerances on interface drawings.
  • Help compile Component Requirements Documents.
  • Support site surveys and the production and review of survey reports.
  • Assist with Design Failure Mode and Effects Analysis and Process Failure Mode and Effects Analysis.
  • Check drawings and documents for accuracy.
  • Identify and apply Lessons Learned from Experience for technical tasks.
  • Demonstrate high-level technical competency and significant experience in a related field.
  • Hold an HNC or higher-level equivalent qualification.
  • Create and develop new ideas.
  • Have experience preparing project documentation, processes, and reports.
  • Demonstrate success in managing stakeholders.
  • Understand BS 8888 and ISO GPS, including ISO 8015.
  • Check technical drawings according to BS 8888 and ISO 8015.
  • Have deep experience in design, manufacture, material selection, welding, fabrication, and machining techniques.
  • Be familiar with Design Failure Mode and Effects Analysis and Process Failure Mode and Effects Analysis.
  • Have excellent written and verbal communication skills.

Responsibilities

  • Manage and challenge requirements for existing waste containers and interface equipment.
  • Support engineering activities as defined by the Engineering Manager.
  • Provide guidance and assurance to Senior Engineers and Designers.
  • Assist in defining product requirements.
  • Guide understanding of tolerances on interface drawings.
  • Help compile Component Requirements Documents.
  • Support site surveys and produce and review survey reports.
  • Assist with Design Failure Mode and Effects Analysis and Process Failure Mode and Effects Analysis.
  • Check drawings and documents for accuracy.
  • Identify and apply Lessons Learned from Experience for technical tasks.

Desired Qualifications

  • Experience delivering work for highly regulated industries.
  • Experience in the nuclear sector.
  • Familiarity or previous design experience with nuclear systems, including mechanical handling.
  • Experience with computer-aided design using Inventor.
  • Security Clearance clearance, or the ability to obtain it.

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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