Mechanical Engineer

Mott MacDonald Bentley is a fully integrated design and build business combining the design expertise of Mott MacDonald with the contracting experience of JN Bentley, operating across water, energy and environment sectors throughout the UK. With an annual turnover surpassing £500 million, Mott Macdonald Bentley cements its position as a leader within the industry. The sustained, robust business performance creates an ideal environment for career growth.

MMB has successfully extended its contract with Thames Water for an additional five years. As the largest water and wastewater provider in the UK, Thames Water serves 15 million customers throughout London and the Thames Valley. This extension will carry the current agreement through to the end of AMP8 in March 2030. MMB is delivering work on three frameworks in the region, which sees us undertake a varied programme of water and wastewater non-infrastructure and infrastructure projects to improve the network. With sites located across the Thames Valley region including; Aylesbury, Banbury, and Reading. Engineering is at the very core of what we do. Be it civil, mechanical or electrical, our engineers are based on site and play a practical, hands-on role in the successful delivery of projects.

As a Mechanical Engineer you'll work on projects that make a real difference to our environment and our communities - from improving flood defences, to upgrading water treatment works and providing nature-based solutions that improve biodiversity.

You will play a pivotal role in shaping the mechanical functions throughout the lifecycle of various projects. From concept design to commissioning, you will ensure that all mechanical aspects are meticulously considered and integrated.

The Role Of a Mechanical Engineer Includes

• Deliver mechanical installations on process plants, integrating design, construction and commissioning, and supporting pre‑construction activities including design input, QA, procurement and commercial support
• Contribute to framework and project safety procedures, and manage construction‑phase activities such as outage planning, subcontractor oversight, programme management and mechanical/process safety
• Lead Quality Assurance through ITPs, acceptance documents, training materials, completion documentation and defect management, driving a strong QA/QC culture
• Commission mechanical plant, manage performance testing, and ensure projects are delivered to “As Constructed” status with accurate completion documentation
• Support and develop Mechanical Engineers within the team

What You’ll Need

• CSCS
• HNC / Degree in Mechanical Engineering or related field, or equivalent experience
• Working towards professional registration with an appropriate body
• Understand civil engineering principles and MEICA construction
• Understanding of relevant British & International Standards with a good knowledge of Client and WIMES standards
• Excellent organisation and problem-solving skills
• Ability to communicate effectively with team members and stakeholders
• A valid driving licence and willingness to travel to sites across your operational region

What Would Be Desirable

• Experience working with pumps, pipework, valves, screens, scrapers, mixers, blowers would be beneficial
• May suit persons with a previous background in mechanical quality assurance, a supervisory role in mechanical process installation or technical role at a process plant supplier.

What’s In It For You Alongside our significant training and development investment, bespoke progression plan and support to achieve professional chartership, we offer a wide range of financial, lifestyle, health and wellbeing benefits that you can tailor to your needs.

To view our full range of benefits, please see the Bentley benefits brochure attached.