Overview
As a Senior Mechanical Design Engineer, you will develop fluid systems within a nuclear-focused engineering context. You will collaborate with multi-disciplinary teams to deliver safe, compliant designs and maintain CAD/BIM documentation. The role offers opportunities to influence layout, modelling, and design reviews across the project lifecycle. You will work in a safety-conscious environment with a strong emphasis on quality, timeliness, and collaborative problem solving. This position combines technical leadership, hands-on design work, and close coordination with stakeholders to shape complex infrastructure.
Pay / Benefits
- hybrid work: 1-2 days remote per week
- attractive social benefits including holiday bonuses
- ongoing training and numerous career opportunities
- internal promotion culture (70% managers promoted internally)
- employee committee engagement
- diversity and equal opportunity commitment
Responsibilities
- Develop 2D CAD drawings, including PFDs and P&IDs
- Prepare 3D CAD/BIM models, plant layouts, piping design, isometrics, MTO, GA drawings and sketches
- Perform layout optimisation across design phases
- Participate in 3D model reviews, layout reviews, design reviews and technical meetings
- Ensure compliance with design safety factors, tolerances, standards, codes and legislation
- Collaborate with multi-disciplinary teams to ensure coordinated design
- Maintain design process records and CAD/BIM documentation databases
- Report status to management and meet targets regarding quality, time and budget
- Support and mediate solutions with all stakeholders aligned
- Ensure adherence to H&S policies and project Quality requirements
Key requirements
- Previous experience as Mechanical Design Engineer or similar
- Ability to work within 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) for model and drawing creation
- Professional qualification in an engineering related field
- SC Clearance or capable of achieving it
- Good communication skills, written and oral
- Focus on delivering quality output to time and budget
- Integrity and ability to instil it in others
- 2D CAD (AutoCAD)
- 3D CAD/BIM (Revit, Inventor, SolidWorks, Solid Edge, Siemens NX, PDMS, AutoCAD Plant 3D)
- PFD and P&ID development
Senior Mechanical Design Engineer (Fluid Systems) in Sunderland employer: Assystem
Assystem is an exceptional employer, offering a dynamic work environment in Warrington that fosters innovation and collaboration among its 8,000 experts. With a strong commitment to employee growth, Assystem provides opportunities for professional development in the highly regulated nuclear engineering sector, ensuring that team members are equipped with the skills needed to excel in their roles. The company's inclusive culture values diverse perspectives, making it a rewarding place for those looking to make a meaningful impact in project risk management.
