Principal Mechanical Engineer

Company: Mott MacDonald
Apply for the Principal Mechanical Engineer
Location: Glasgow
Job Description:

Mott MacDonald Bentley, a fully integrated design and build business, is seeking a Principal Mechanical Engineer to lead mechanical engineering activities for major water and wastewater projects across the UK.

Responsibilities

  • Lead and oversee the design, planning, and execution of the mechanical engineering aspects of our projects.
  • Provide technical expertise and guidance to our mechanical engineers and project teams, and develop knowledge and excellence within the team.
  • Mentor and develop junior engineers and team members.
  • Lead the development of the mechanical design of water and wastewater infrastructure and non‑infrastructure projects through the project lifecycle, encompassing P&IDs, valve schedules, pumps, tanks, process equipment, above‑ground pipework, lifting and access steelwork.
  • Coordinate with the wider design team of Electrical, Civil, Geotech and Process engineers.
  • Work closely with the project teams to ensure applications of the client’s asset standards and engage in particular technical discussions on best practice and standards waivers.
  • Work closely and collaboratively with the commercial, operational and construction teams to develop efficient, practical and safe solutions throughout design stages, construction and beyond.
  • Positively engage with the client, managing relationships and adopting a one‑team approach to supporting them in achieving their aims.

Required Qualifications and Skills

  • Chartered Mechanical Engineer or above.
  • Degree in Mechanical Engineering or a related field.
  • Strong knowledge of the water and/or wastewater industry.
  • Strong knowledge of mechanical engineering principles, practices and standards relating to process industries.
  • Excellent communication, leadership and problem‑solving skills.
  • Proven ability to manage multiple design tasks and meet deadlines.

Benefits

  • Competitive pension match of 4.5% to 7% and an annual bonus scheme.
  • Annual professional institution subscription costs paid.
  • 33 days holiday per year (including public holidays) with the ability to buy, sell or carry over.
  • Life Assurance, Private Medical, Critical Illness Insurance and health screening options.
  • Flexible working support.
  • Access to diversity and inclusion groups supporting LGBTQ+, gender, race and ethnicity, disability and parents/carers communities.
  • Enhanced family and carers leave: 26 weeks paid maternity and adoption leave, 2 weeks paid paternity/partner leave, option for shared parental leave and up to 2 paid additional days for significant caring responsibilities.
  • Structured development schemes, mentorship, fast‑tracked chartership reviews and tailored training opportunities.

We are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision follows UK Government changes made in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes that do not require Skilled Worker sponsorship now or in the future.

Even if you don’t meet every requirement for this role but are excited about the opportunity, we encourage you to apply.

We are committed to ensuring that our recruitment practices are barrier‑free and as inclusive as possible. All applicants are considered without regard to race, colour, religious or ethical beliefs, disability, age, gender or orientation in accordance with our equal opportunities policy.

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Posted: June 22nd, 2026