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ASSYSTEM

Engineering services for design, construction, commissioning

Senior Mechanical Design Engineer

Design EngineeringConfirmed live in the last 24 hours
Full-timeDerby, UKNo salary listed

About the Job

Requirements

  • Previous experience as a Mechanical Design Engineer or in a similar role.
  • Ability to work within the engineering team to realise designs.
  • Familiarity with 2D computer-aided design (CAD) systems, such as AutoCAD, for drawing creation.
  • Familiarity with 3D CAD/building information modeling (BIM) systems, such as Revit, Inventor, Solidworks, Solid Edge, Siemens NX, PDMS, and AutoCAD Plant 3D, for model and drawing creation.
  • A professional qualification in an engineering-related field is required.
  • Must hold or be capable of achieving Security Check (SC) clearance.
  • Good written and oral communication skills.
  • Focus on delivering quality output within time and budget.
  • Act with integrity and instill it in others.
  • Ability to work independently, using initiative and self-motivation.
  • Flexibility to adapt to role needs and maintain delivery targets.
  • Confidence in suggesting alternative solutions that provide safety, time, cost, and quality benefits.
  • Ability to manage own time and deliver within agreed timescales.

Responsibilities

  • Develop fluid systems and work closely with multidisciplinary teams and the supply chain to help deliver system design.
  • Develop 2D CAD drawings, including process flow diagrams (PFDs) and process and instrumentation diagrams (P&IDs).
  • Prepare 3D CAD/BIM models, plant layouts, piping designs, isometrics, material take-offs (MTOs), 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 multidisciplinary engineering teams to ensure a coordinated design.
  • Maintain records of the 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 the team and maintain required standards and expectations; meet targets and quality, time, and budget constraints.
  • Support and mediate solutions to issues, ensuring all stakeholders are aligned.
  • Ensure adherence to company statutory health and safety policies and rules, and compliance with project and quality requirements.

About the Company

ASSYSTEM

Engineering services for design, construction, commissioning

Assystem provides engineering services for complex projects, covering design, construction, supervision, commissioning, and operation, with a strong focus on the nuclear and energy sectors. Its approach combines multidisciplinary engineering teams and project-management capabilities to move projects from initial concept through to operation. The company differentiates itself through a long track record, strategic acquisitions (including Alphatem in 1995 and Mactech Energy Group in 2025) and an early public offering in 2013, which have expanded its capabilities and market reach in the energy and nuclear fields. Its goal is to be a leading, reliable partner for clients by delivering end-to-end engineering services and helping them meet safety, performance, and regulatory requirements across the project lifecycle.

Company size
5,001-10,000
Company stage
IPO
Headquarters
Paris, France
Founded
1966

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