Job Description

Principal Mechanical Engineer in London

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Location

London

Salary

Negotiable

Contract

Contract

Principal Mechanical Engineer

Location: Remote (occasional travel to local office: London, Manchester, Newcastle, Glasgow)
6 Month rolling contract
£65 per hour Umbrella - Inside IR35 only

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

Disclaimer

This vacancy is being advertised by either Advanced Resource Managers Limited, Advanced Resource Managers IT Limited or Advanced Resource Managers Engineering Limited ("ARM"). ARM is a specialist talent acquisition and management consultancy. We provide technical contingency recruitment and a portfolio of more complex resource solutions. Our specialist recruitment divisions cover the entire technical arena, including some of the most economically and strategically important industries in the UK and the world today. We will never send your CV without your permission. Where the role is marked as Outside IR35 in the advertisement this is subject to receipt of a final Status Determination Statement from the end Client and may be subject to change.

Job reference 129713_1778490031
Date posted 11 May 2026
Sector Energy

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Beth Barker

Beth Barker

Principal Consultant

+44 (0)2392 228 206

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