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Principal Mechanical Engineer

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: ARM
Full Time position
Listed on 2026-05-31
Job specializations:
  • Engineering
    Mechanical Engineer, Energy Engineer
  • Energy/Power Generation
    Energy Engineer
Salary/Wage Range or Industry Benchmark: 125000 - 150000 GBP Yearly GBP 125000.00 150000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Principal Mechanical Engineer

Location: Remote (occasional travel to local office: London, Manchester, Newcastle, Glasgow)

6 Month rolling contract

Overview: ARM is recruiting for an experienced Mechanical Engineer to support a growing Energy Transition team delivering some of the UK's most innovative low- and zero-carbon energy projects.

The Role: As a senior member of the engineering team, you will lead mechanical engineering activities from early‑stage feasibility studies through to detailed design, construction support, operation and decommissioning. You will work closely with developers, utilities, EPC contractors, OEMs, government bodies and investors to deliver safe, practical and commercially effective engineering solutions.

Key Responsibilities:

  • Develop innovative and cost‑effective mechanical engineering solutions
  • Lead mechanical design activities across Feasibility, Concept, FEED and Detailed Design stages
  • Produce engineering calculations, specifications and datasheets
  • Specify and assess major equipment including:
    • Turbines
    • Compressors
    • Pumps
    • Pressure vessels
    • Heat exchangers
  • Support development of PFDs and P&IDs alongside process engineers
  • Participate in plant layout development and 3D model reviews
  • Review vendor proposals and liaise with equipment suppliers
  • Provide technical support for operational plant integrity and troubleshooting
  • Support bid preparation and multidisciplinary engineering proposals

Requirements:

  • Degree in Mechanical Engineering or related discipline
  • Chartered Engineer status (or working towards CEng/IEng)
  • Significant post‑graduate experience within Power Generation or Oil & Gas
  • Strong understanding of industry codes and standards for plant equipment and piping systems
  • Experience in pressure vessel and piping design, including stress analysis
  • Familiarity with plant 3D modelling environments
  • Expert knowledge of Microsoft Office
  • Operational plant troubleshooting and integrity assessment experience
  • Knowledge of gas turbine systems
  • Reciprocating engine experience would be advantageous

Must have Right to Work in the UK.

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