Mechanical Design Engineer

Job Description

For 50 years, we've been driven by the firm belief that engineers are the architects of tomorrow's world, leading the way with their daring, their expertise and their ability to push boundaries.
Together with our customers, our 6,000 employees innovate on a daily basis and contribute to accelerating energy transition throughout the world. They support the world's greatest engineering projects in the fields of energy, digital and transport.
A fast-growing international Group, we are present in 13 countries (in Europe, the Middle East, Asia and Africa).

Assystem are a key engineering design delivery partner for the UK SMR (Small Modular Reactor) project.
Our expanding UK-wide team are innovating in engineering across a spectrum of digital, energy transition and Nuclear technologies such as fusion and modularisation alongside large-scale critical Infrastructure.

Join us and make your contribution towards the UK meeting our global net zero ambitions with multiple units planned to be supplying carbon free electricity within the next decade.

Job Title: Mechanical Design Engineer - Balance of Plant
Location: Warrington / Derby
Employment: Permanent
Reports to: Balance of Plant Lead Engineers.

The Role:
Reporting to the Balance of Plant Leads, the Mechanical Design Engineer will support the design and development of the Balance of Plant Systems, including production of Process and Instrument Diagrams and 3D CAD models plus support to engineering design activities.

Key Responsibilities:

  • Using CAD to create technical plans and design high quality CAD product models by preparing general arrangement drawings, routine layouts, assemble and detail drawings.
  • Drawings, sketches, and diagrams and schemes.
  • Revise and update CAD drawings as required.
  • Develop working drawings from sketches or descriptions developed by Engineers.
  • Work closely with the wider team to ensure a coordinated design.
  • Develop both 2D and 3D models, PFD's and P&ID's.
  • Coordinate and assist in team design reviews in order to evaluate design concepts and make recommendations.
  • Develop alternative design solutions or quick engineering solutions for complex problems.
  • Maintain records of design process in accordance with sound design practices and ISO requirements.
  • Maintain and update a database for the CAD design documentation.


Your Background:

  • Experience of CAD design and development within various sectors of engineering, and preferably in nuclear or highly regulated industries such as oil and gas or process sector.
  • Good knowledge of engineering principles and the ability to create and read technical drawings, and ability to understand and interpret designs.
  • Good IT skills and experience using CAD software such as AutoCAD, Revit and Solidworks, NX and Team centre collaboration.
  • Ability to transfer, display and manipulate drawing information using
  • Good attention to detail to create detailed drawings and ensure accuracy and quality
  • Good communication skills and teamwork with engineers and other project stake holders.
  • Organisation and time management to complete work to project deadlines.
  • Systems Engineering awareness.


  • Higher National Diploma in a related engineering or design discipline.
  • or, BEng in Engineering design discipline.

Security Clearance:
Due to the nature of work to be undertaken applicants will be required to meet certain residency criteria in order to attain a minimum level of UK security clearance if not already security cleared to a minimum BPSS level.