We are recruiting on behalf of our client Whessoe Engineering, for an experienced Senior Mechanical Engineer to join their engineering delivery team in Darlington. Our client is supported by Samsung CandT and is part of a globally recognised organisation. With a strong reputation in the market and clear plans for future growth, this is a key opportunity to join the business at an important stage in its development. The successful candidate will play a central role in the mechanical design and analysis of storage tanks used across energy and process industries, supporting the delivery of engineering work within a multi-disciplinary project environment. Key Responsibilities Mechanical design of storage tanks Production and verification of engineering calculations and deliverables Supervision of engineers and designers within project teams Technical support for project bids and tender submissions Ensuring compliance with recognised industry design codes, including API and Eurocodes Requirements Degree in Mechanical Engineering Experience within the oil, gas, petrochemical, or energy sectors Experience designing ambient or low-temperature storage tanks Knowledge of tank design codes Desirable Experience Chartered Engineer status Experience with analysis software such as ANSYS, STAAD, or CAESAR II Knowledge of pressure vessel design codes Experience using AutoCAD, SmartPlant 3D, PDMS, or Inventor This role offers the opportunity to contribute to technically complex projects