Principal Mechanical Engineer
Fusion People Ltd
Greater London · posted 18 August 2026
Salary
£35 – £58 an hour
Job type
contract
Location
Greater London, England
Category
Engineering
Principal Mechanical Engineer
Hybrid with occasional visits to the office
Location - Manchester OR London OR Newcastle OR Glasgow
Contract role - 6 months rolling
Inside IR35 - £58 / hour Umbrella
A Principal Mechanical Engineer is required to join a design consultancy on a 6-month rolling contract. The role is hybrid and predominantly home based, but you must be willing to occasionally travel to either Manchester, London, Newcastle or Glasgow (dependent on your location). This role will be working in the Energy Transition industry working on low-carbon projects from early-stage development through construction, operation and eventual decommissioning, currently focusing on power plant projects.
Responsibilities
- Developing cost-effective, practical mechanical engineering solutions to complex problems
- Producing calculations, equipment specifications and datasheets for turbines, compressors, pumps, pressure vessels and heat exchangers
- Collaborating with process engineers on PFDs and P&IDs
- Supporting plant layout development and 3D model reviews
- Working with equipment vendors and evaluating technical proposals
- Providing engineering advice on plant integrity issues for operational assets
- Contributing to mechanical discipline bids and wider multi-disciplinary proposals
Requirements
- A relevant engineering degree
- Working towards chartership
- Significant work experience in Power Generation or Oil & Gas
- Strong knowledge of industry codes and standards for plant equipment and piping design
- Experience in pressure vessel and piping design, including stress analysis
- Familiarity with plant 3D modelling, working alongside designers and pipe stress engineers
- Proficiency in MS Excel for schedules/datasheets and MathCAD for engineering calculations