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Assystem

Senior Mechanical Design Engineer

Assystem

Senior Mechanical Design Engineer developing fluid systems within a multi-disciplinary team. Engaging in 2D and 3D CAD design work for nuclear engineering projects.

Posted 5/13/2026full-timeRemote • Warrington • 🇬🇧 United KingdomSeniorWebsite

About the role

Key responsibilities & impact
  • Developing fluid systems
  • Working closely with multi-disciplined teams and the supply chain
  • Developing 2D CAD drawings, including process flow diagrams (PFD) and process and instrumentation diagrams (P&ID)
  • Preparing 3D CAD/BIM models, plant layouts, piping design, isometrics, MTO, general arrangement drawings, detail drawings and sketches
  • Performing layout optimisation engineering across design phases
  • Participating in 3D model reviews, layout reviews, design reviews and technical meetings
  • Ensuring compliance with required design safety factors, tolerances, specifications, standards, codes, legislation and requirements
  • Collaborating with multi-disciplinary engineering teams to ensure a coordinated design
  • Maintaining records of design process in accordance with sound design practices
  • Maintaining and updating databases for CAD/BIM design documentation
  • Reporting status and updates to management line

Requirements

What you’ll need
  • Previous experience as a Mechanical Design Engineer or a similar role
  • Ability to work within the engineering team to realise designs
  • Familiarity with 2D CAD systems (AutoCAD) for drawing creation
  • Familiarity with 3D CAD/BIM systems (Revit, Inventor, Solidworks, Solid Edge, Siemens NX, PDMS, AutoCAD Plant 3D or similar) for model and drawing creation
  • Professional qualification in an engineering related field
  • SC Clearance or capable of achieving it

Benefits

Comp & perks
  • Attractive social benefits, including an engaging Employee Committee and holiday bonuses
  • Ongoing training with numerous career opportunities

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools
fluid systems development2D CAD drawingsprocess flow diagramsprocess and instrumentation diagrams3D CAD/BIM modelspiping designlayout optimisation engineeringdesign reviewscompliance with design safety factorsdesign documentation
Soft Skills
collaborationcommunicationteamworkproblem-solvingattention to detail
Certifications
professional qualification in engineeringSC Clearance