Project Design Engineer - Mechanical

* Internal applicants are welcome.

Mott Mac Donald Bentley is a fully integrated design and build business combining the design expertise of Mott Mac Donald with the contracting experience of JN Bentley to deliver award winning projects.

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.

We have a great opportunity to be innovative and creative in these new projects to deliver affordable solutions. We are already on site supporting the completion of an existing project and we are due to land new projects on site in 2025 as we continue to demonstrate to our client just what MMB is all about.

• Be part of a unique and dynamic Design-and-Build environment?
• Manage the design of water and wastewater projects?
• Fast track your Chartership and attain a clear route for career progression?
• Be a member of a multi-disciplinary project team, supporting both your, and the team personal and professional development?
• Have the flexibility of working from home, office and site?
• Have the opportunity to see your designs brought to life?

• Work as part of a “project triangle” alongside a Site Manager and Quantity Surveyor to ensure that technical, constructability and commercial aspects of project delivery are considered throughout.
• Lead the design of treatment or infrastructure projects from the initial outline to detailed design, through construction, commissioning, and handover.
• Coordinate the project team including civil, electrical, mechanical and process designers, BIM modelers and technical specialists and ensure designs are completed on programme, within budget, and to the quality defined by each framework and industry specifications.
• Undertake design in own discipline and mentor less experienced colleagues where appropriate.
• Build positive relationships with the clients' project, operational and technical assurance teams and promote a “one‑team” approach.

• Accredited Degree in Engineering – Mechanical.
• Incorporated Member of Engineering Institution.
• Outline and detailed design experience of water or wastewater projects.
• Knowledge of the Designer or Principal Designer duties under CDM 2015.

• MMB match employee pension contributions between 4.5% and 7%.
• As an independently owned business we share the financial success of the business with all our colleagues including our annual bonus schemes.
• Payment of annual professional institution subscription costs.

• A minimum of 33 days holiday each year, inclusive of public holidays, with the ability to buy, sell or carry over annual leave through our flexible benefits programme.
• Access to Life Assurance / Private Medical Insurance / Critical Illness Insurance and Health Screening options.
• We are happy to talk openly about flexible working and how we can support your responsibilities beyond the workplace.
• Join a wide range of groups including our Advanced Employee Networks which support our LGBTQ+, gender, race and ethnicity, disability, and parents/carers communities.

• Enhanced family leave policies, including 26 weeks paid maternity and adoption leave, and two weeks paid paternity/partner leave plus the option for shared parental leave.
• Up to 2 paid additional days leave are provided for those with significant caring responsibilities.

• MMB are committed to empowering our people to grow professionally and thrive in their careers. We offer structured development schemes that support your journey toward professional chartership.
• From day one, employees are fast‑tracked towards chartership reviews and benefit from mentorship, hands‑on experience, and tailored training…