Senior Mechanical Design Engineer

Company: Assystem GmbH
Apply for the Senior Mechanical Design Engineer
Location: Warrington
Job Description:

The Role

Reporting to the Turbine Island Lead, the Senior Mechanical Design Engineer will be responsible for developing fluid systems. The Senior Mechanical Design Engineer shall work closely with multi-disciplined teams and the supply chain to help deliver the system design.

Key Responsibilities

  • Develop 2D CAD drawings, including process flow diagrams (PFD) and process and instrumentation diagrams (P&ID).
  • Prepare 3D CAD/BIM models, plant layouts, piping design, isometrics, MTO, general arrangement drawings, detail drawings and sketches.
  • Perform layout optimisation engineering across design phases.
  • Participate in 3D model reviews, layout reviews, design reviews and technical meetings.
  • Ensure compliance with required design safety factors, tolerances, specifications, standards, codes, legislation and requirements.
  • Collaborate with multi-disciplinary engineering teams to ensure a coordinated design.
  • Maintain records of design process in accordance with sound design practices.
  • Maintain and update databases for CAD/BIM design documentation.
  • Report status and updates to management line.
  • Support team and maintain required standards and expectations.
  • Meet targets, quality, time and budget constraints.
  • Support and mediate solutions and issues with resolution with all stakeholders being aligned.
  • Ensure adherence to the company statutory H&S Policies and rules and compliance with the project and Quality.

Why Join the Community of Switchers?

  • Over 55 years in nuclear engineering.
  • Ranked among the top 3 largest nuclear engineering companies.
  • Attractive social benefits, including an engaging Employee Committee and holiday bonuses.
  • Ongoing training with numerous career opportunities.
  • 70% of our managers are promoted internally.
  • Hybrid work: 1-2 days remote per week.

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Posted: June 6th, 2026