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Senior or Principal Mechanical Engineer (Tooling - Lead Engineer)

Assystem | east midlands, United-Kingdom | Posted June 08, 2026

Position Overview

Senior or Principal Mechanical Engineer (Tooling - Lead Engineer)

Location: Derby (travel to AEIL and Client Sites within the UK). Sector: Nuclear Defence | Engineering | Tooling Solutions.

Your Future Team

As part of a growing account, Assystem Energy & Infrastructure is looking to increase our Engineering capability to respond to an increase in demand for a new client account. We are therefore recruiting for a Senior or Principal Mechanical Engineer who will be the Technical Lead for Tooling Equipment.

Your Missions

  • Lead engineering teams from FEED Concept through to Detail Design, with generation or management of technical files containing all required documentation.
  • Support development and growth of a tooling capability within a growing client base.
  • SQEP assess scopes of work from client and deploy within the engineering team.
  • Build effective relationships with internal and external stakeholders inc...

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