Process Engineer

Internal applications are welcome

In November 2023, MMB secured its first ever framework with South West Water, the company responsible for the water and wastewater services of 1.8 million customers in Cornwall, Devon, the Isles of Scilly and parts of Dorset and Somerset. The multi-million-pound AMP8 contract runs for five years to 2029 – with the potential for a further five-year extension – and sees us bring our track record of innovative project delivery to the south west of England for the very first time.

As a Process Engineer you will contribute to projects that significantly impact our environment and communities. Working primarily in the UK water market, MMB provides the feasibility, design, construction, and commissioning services needed to keep water flowing and wastewater treated.

• Prepare and review designs for schemes, ensuring all designs are fit for purpose and meet legislation and standards; lead development of process design deliverables such as process models, mass balances, control philosophies.
• Analyse site performance, identify risks and develop mitigation measures.
• Challenge process selection and delivery effectiveness to ensure best value solutions.
• Identify opportunities for innovation to meet whole‑life cost and net‑zero drivers.
• Produce and review technical specifications and procurement schedules; review supplier bids and technical submissions.
• Apply and contribute to design standards with knowledge of client and industry standards.
• Challenge client specifications and present and defend solutions to complex problems.
• Improve delivery processes, including standard designs, sustainable solutions, and digital tools.
• Act technical checker on project documents and undertake technical reviews across teams.
• Manage interfaces and integration of design with other disciplines; produce documentation.
• Collaborate with commercial, operational and construction teams to develop efficient, practical and safe solutions.
• Supervise and mentor graduates and engineers to develop knowledge and skills.
• Positively engage with the client, adopting a one‑team approach to support their aims.
• Undertake site reviews to ensure buildability and integration within existing systems.

• Chemical Engineering or relevant Process Engineering degree, or related field.
• Working towards Chartered or Incorporated member of professional institution (e.g. ICE, IMechE) or equivalent experience.
• Experience and understanding of water and/or wastewater unit processes and treatment plant; experience delivering process design for wastewater projects.
• Experience of HAZOP studies as chair or team member (advantage).

• Pension matched by employer up to 7%
• Option to purchase, sell and carry over annual leave
• Life assurance / Private Medical Insurance / Critical Illness Insurance and Health Screening options
• 26 weeks maternity leave, enhanced paternity and adoption leave / Shared parental leave
• Payment of annual professional institution subscription costs
• Gym Membership discounts UK wide
• Cycle to work scheme, interest free season ticket loans and discounted dining cards also available

Mott Mac Donald Bentley are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is as a consequence of the changes made to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes in the UK, that do not require sponsorship as a Skilled Worker now or in future.

At Mott Mac Donald Bentley you will be employed by Mott Mac Donald. This role is part of a joint venture between JN Bentley and Mott Mac Donald, and will involve working across the joint venture business, both with Mott Mac Donald and JN Bentley colleagues.

A Mott Mac Donald Bentley we welcome applications from all sectors of the community. We are dedicated to building a diverse workplace where everyone feels included, has the opportunity to thrive, and is treated with respect.

Even if you don’t meet every requirement for this role but are excited about the opportunity, we encourage you to apply. Find out more about our approach to Diversity, Equity & Inclusion here:

We are committed to providing a flexible and agile working environment that supports both our employees and the needs of the business.