JN Bentley
Civil Engineer Project Design Engineer

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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 to deliver award winning projects. 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 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 workload beyond the end of AMP8 in March 2030. We are delivering work in the Thames Valley region (extending from Cirencester in the west to the M25 and from Basingstoke in the South to Banbury in the North). This sees us undertake a varied programme of sizable projects in wastewater treatment, clean water production and Infrastructure (Water and Wastewater networks).
As a Civil Engineer Project Design 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. You’ll work on projects that make a real difference to our environment and our communities by enhancing the efficiency and effectiveness of water and wastewater treatment systems.
This role combines elements of both traditional Project Management and Design Engineering, creating a unique work environment where you can thrive personally and professionally, accelerating your journey to chartership or developing your cross-discipline expertise.
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The role of a Civil Engineer Project Design Engineer includes:
Working 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. Leading the design of treatment or infrastructure projects from the initial outline to detailed design, through construction, commissioning, and handover Coordinating 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 Building positive relationships with the clients’ project, operational and technical assurance teams and promote a "one-team" approach
Please follow the link to our Mott MacDonald Bentley YouTube to find out more about the role of a Project Leader - Project Leader campaign - YouTube
What You’ll Need
Degree in Engineering Working towards professional qualification A valid driving licence and willingness to travel to sites across your operational region
What’s in it for you:
Financial wellbeing
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.
Health and wellbeing


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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 and carers leave
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 paidadditionaldays leave are provided for those with significant caring responsibilities.
Learning and development
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 opportunities. Mott MacDonald 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.
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