Senior DfMA Mechanical Engineer – Water & Wastewater

Company: Mott MacDonald
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Job Description:

Internal applicants welcome

Mott MacDonald Bentley (MMB) are recruiting for their successful ‘DfMA and standardisation’ team to develop Standard Products and accelerate their integration into our framework design teams. We are looking for technically strong Mechanical Engineers to join the team and lead the design of a wide range of standardised water and wastewater assets.

Role Responsibilities

  • Be part of a unique team establishing best practice across multiple frameworks.
  • Help shape the technical quality and delivery of MMB’s design outputs.
  • Work in a multi-disciplinary team delivering high-quality standard products – encompassing 3D models, standard 2D designs and key documents & deliverables.
  • Determine optimum standard products for cost, time, quality, safety, carbon and buildability.
  • Collaborate with colleagues from across our business (site operations, procurement, commercial) and our supply chain.

Requirements

  • Strong technical background – water & wastewater treatment processes & assets, pumping, screening, valving.
  • Experience producing standard deliverables – P&IDs, mechanical GAs, calculations, control philosophy, HAZOPs, schedules and specifications.
  • Appreciation and knowledge of related disciplines – electrical and ICA, process.
  • Knowledge of industry and client specifications.
  • Degree in Mechanical Engineering (or directly related subject).
  • Professionally qualified or working towards professional qualification with IMechE or relevant Institution.
  • UK water and/or wastewater experience.

What’s in it for you

Financial wellbeing

  • MMB match employee pension contributions between 4.5% and 7%.
  • 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 our flexible benefits programme.
  • Access to life assurance, private medical insurance, critical illness insurance and health screening options.
  • Flexible working arrangements available.
  • Participation in Advanced Employee Networks supporting LGBT+, gender, race and ethnicity, disability, and parents/carers communities.

Enhanced family and carers leave

  • 26 weeks paid maternity and adoption leave.
  • Two weeks paid paternity/partner leave, with options for shared parental leave.
  • Up to two paid additional days leave for significant caring responsibilities.

Learning and development

  • Structured development schemes supporting Chartership reviews and 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.

We are committed to ensuring that our recruitment practices are barrier‑free and inclusive. Please call 01756 691572 or email recruitment@jnbentley.co.uk to discuss any adjustments that we can make.

Location: GB

Contract Type: Permanent

Work Pattern: Full Time

Market: Water

Discipline: Water

Job Ref: 14771

Recruiter Contact: lauren.hutchinson@jnbentley.co.uk

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Posted: May 27th, 2026