Senior Mechanical Engineer

Are you an experienced Senior Mechanical Engineer looking to work on cutting–edge liquefied gas projects with a company that values innovation, flexibility, and professional development? We are exclusively recruiting for a permanent Senior Mechanical Engineer on behalf of Whessoe Engineering Ltd, with over 200 years of excellence in the industry, based in Darlington.

The role drive engineering excellence in global energy infrastructure

As a Senior Mechanical Engineer, you will play a key role in the mechanical design and analysis of tanks, pressure vessels, and heat exchangers for large–scale oil, gas, and LNG projects.

Key responsibilities:

• Deliver mechanical design of ambient and cryogenic storage tanks, pressure vessels, and heat exchangers
• Conduct engineering calculations, stress assessments, and finite element analysis (ANSYS, STAAD, Caesar II)
• Prepare and check technical documents including design reports, specifications, and datasheets
• Apply design codes such as API 620/650, ASME VIII, and Eurocodes
• Lead and mentor other engineers and interface with design draughting teams
• Support tender development, including labour–hour estimation and technical input
• Ensure compliance with client requirements, project schedules, and internal quality procedures

What we re looking for:

• Degree–qualified in Mechanical Engineering (BEng or MEng)
• Chartered Engineer status (or working towards) is desirable
• Strong experience in mechanical design within oil & gas, LNG, or petrochemical projects
• Proficient in design and analysis of storage tanks, vessels, and thermal equipment
• Working knowledge of FEA and stress analysis tools (ANSYS, STAAD, Caesar II)
• Familiar with AutoCAD, and ideally 3D tools such as SmartPlant 3D, PDMS, or Inventor
• Experience applying major design codes (API, ASME, Eurocodes)