Project Design Engineer

Company: MOTT MACDONALD
Apply for the Project Design Engineer
Location: Rhyl
Job Description:

Internal applicants are welcome.

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.

We have secured a new framework with Dŵr Cymru Welsh Water that will last up to eight years, this will see MMB tackle projects across the DCC region covering both clean and wastewater treatment sites, as well as below ground assets, reservoirs and nature‑based solutions.

What does a Project Design Engineer do day to day?

  • 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 to ensure designs are completed on programme, within budget, and to the quality defined by each framework and industry specifications.
  • Undertaking design in own discipline and mentoring less experienced colleagues where appropriate.
  • Building positive relationships with the clients’ project, operational and technical assurance teams and promoting a “one‑team” approach.

What you’ll need

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

Benefits

Financial wellbeing

  • MMB match employee pension contributions between 4.5% and 7%.
  • Sharing of the business’s financial success through annual bonus schemes.
  • Payment of annual professional institution subscription costs.

Health and wellbeing

  • A minimum of 33 days holiday each year, inclusive of public holidays, with the ability to buy, sell or carry over annual leave through a flexible benefits programme.
  • Access to Life Assurance, Private Medical Insurance, Critical Illness Insurance and Health Screening options.
  • Flexible working support to accommodate responsibilities beyond the workplace.
  • Participation in employee networks supporting LGBTQ+, gender, race, ethnicity, disability and parents/carer communities.

Enhanced family and carers leave

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

Learning and development

  • Structured development schemes supporting progress toward professional chartership.
  • Fast‑tracked chartership reviews from day one, with mentorship, hands‑on experience and tailored training opportunities.

English Work Eligibility

Mott MacDonald Bentley is not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. 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.

Equal Opportunity & Inclusion

Diversity, equity and inclusion are core to our culture. We welcome applications from all sectors of the community. Our recruitment practices are barrier‑free and inclusive, and we make reasonable adjustments during the application process and throughout an employee’s career.

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Posted: June 26th, 2026