Principal Mechanical Engineer (Energy)

Company: WSP in the UK & Ireland
Apply for the Principal Mechanical Engineer (Energy)
Location: Cardiff
Job Description:

Principal Mechanical Engineer (Energy) – WSP UK & Ireland

We are seeking a Principal Mechanical Engineer to join our Energy Transition Team. You will lead the development of mechanical designs on a wide range of energy projects from inception through decommissioning, including conventional power plants, energy-from-waste plants, industrial facilities and carbon capture schemes.

Responsibilities

  • Work with the project team to develop cost‑effective, efficient and innovative solutions to complex problems and create practical designs.
  • Engage on projects in various stages: 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 and heat exchangers.
  • Collaborate closely with process engineers on process flow diagrams and piping & instrumentation diagrams.
  • Support development of plant layouts and plant 3D models.
  • Work with equipment vendors on design of equipment packages and participate in technical evaluations.
  • Provide engineering advice and technical solutions related to plant integrity issues on operational assets.
  • Develop proposals and bids for the mechanical discipline and contribute to multidisciplinary proposals.

Qualifications

  • A degree in a relevant engineering subject.
  • A chartered engineer or working toward IEng/CEng and membership of a relevant engineering institute.
  • Postgraduate work experience within the power generation or oil & gas industry.
  • Knowledge of national and international codes and standards for design and manufacturing of plant 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 for schedules and datasheets, MathCAD for engineering calculations.
  • Experience with thermal plant operational and integrity issue troubleshooting and problem solving.

Location is flexible across our UK office network.

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Posted: December 23rd, 2025