Principal Mechanical Engineer; Energy

Principal Mechanical Engineer (Energy)

Join WSP in the UK & Ireland as a Principal Mechanical Engineer on our Energy Transition Team. Lead development of mechanical designs across a wide range of energy projects from inception to decommissioning, including conventional power plants, waste‑to‑energy plants, industrial facilities and carbon capture schemes.

• Develop cost‑effective, efficient and innovative mechanical solutions for complex projects at all stages, including feasibility studies, concept designs, FEED studies, value engineering and detailed design.
• Prepare mechanical deliverables such as calculations, equipment specifications and datasheets for turbines, compressors, pumps, pressure vessels, heat exchangers.
• Collaborate with process engineers to develop process flow diagrams and piping & instrumentation diagrams.
• Support plant layout development and 3D model creation.
• Evaluate vendor designs and engineer equipment packages.
• Provide engineering advice on plant integrity issues for operational assets.
• Develop proposals and bids for the mechanical discipline and contribute to multi‑disciplinary proposals.

• A degree in a relevant engineering subject.
• Chartered Engineer status or working towards IEng/CEng and membership of a relevant engineering institute.
• Post‑graduate experience within power generation or oil & gas industry.
• Knowledge of national and international codes and standards for equipment and piping.
• Experience in pressure vessel and piping design and stress analysis.
• Experience working with mechanical designers and pipe stress engineers on plant 3D models.
• Proficiency in MS Excel, MathCAD and engineering calculation tools.
• Experience troubleshooting and problem‑solving for thermal plant operation and integrity issues.

Our hybrid working policy offers flexibility to work from home two days a week and collaborate in modern offices across the UK. WSP provides a supportive culture of inclusion, belonging and continuous development with the WSP My Hour programme, virtual GP service, flexible benefits and a comprehensive wellbeing programme.

We welcome applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, gender reassignment, religion or belief, marital status, pregnancy or maternity/paternity. As a Disability Confident leader, we interview all disabled applicants who meet the essential criteria and will support applicants with necessary workplace adjustments.