Principal Mechanical Engineer

Principal Mechanical Engineer

As a Principal Mechanical 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.

• 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, developing 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 project teams to ensure applications of client’s asset standards and engage in technical discussions on best practice and standards waivers.
• Collaborate with 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 support them in achieving their aims.

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

• Financial wellbeing: MMB matches employee pension contributions between 4.5 % and 7 %. Annual bonus schemes for all colleagues. Payment of annual professional institution subscription costs.
• Health and wellbeing:
  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 arrangements. Access to advanced employee networks supporting diversity.
• Enhanced family and carers leave: 26 weeks paid maternity and adoption leave; 2 weeks paid paternity/partner leave plus the option for shared parental leave. Up to 2 paid additional days leave for significant caring responsibilities.
• Learning and development:
  Structured development schemes that support progression toward professional chartership, with mentorship, hands‑on experience and tailored training from day one.
• Flexibility:
  Support for flexible and agile working to meet employee needs and business requirements.

Mott Mac Donald Bentley are 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.

We welcome applications from all sectors of the community and are dedicated to building a diverse workplace where everyone feels included, has the opportunity to thrive, and is treated with respect.

We are committed to ensuring that our recruitment practices are barrier‑free and as inclusive as possible. This includes making adjustments during the job application process and throughout your future career with us. Please call or e to discuss any such adjustments that we can make. You can read more about our Equal Opportunities Policy here:
Equality, diversity and inclusion - Mott Mac Donald