Senior Mechanical Engineer

As a Senior Mechanical Engineer you will play a pivotal role in shaping the mechanical functions throughout the life cycle of various projects, from concept design to commissioning. You will work primarily in the UK water market, delivering feasibility, design, construction, commissioning, and handover services for water and wastewater infrastructure.

• Lead the mechanical design of water and wastewater infrastructure and non‑infrastructure projects through outline and detailed design, construction, commissioning, and handover.
• Prepare and review P&IDs, valve schedules, pump calculations, safe access and lifting arrangements, and above‑ground pipework layouts.
• Coordinate with electrical, civil, geotechnical and process designers to ensure designs are completed on programme, within budget, and to quality standards set by framework specifications.
• Collaborate with commercial, operational and construction teams to develop efficient, practical and safe solutions throughout design stages and construction.
• Engage positively with the client, managing relationships and supporting them to achieve their aims.
• Support the mechanical engineering team by coaching and mentoring engineers and identifying suitable resources for projects.

• Degree in Mechanical Engineering or a related field.
• Chartership (CEng) with a relevant engineering institution.
• Experience delivering high‑quality outputs in accordance with design, quality and safety standards.
• Valid driving licence and willingness to travel to sites within the operational region.
• Water/wastewater industry experience.

Financial wellbeing

• MMB matches employee pension contributions between 4.5 % and 7 %.
• Annual bonus schemes based on business performance.
• Payment of annual professional institution subscription costs.

Health and wellbeing

• Minimum 33 days holiday each year, inclusive of public holidays, with flexible benefits program to buy, sell or carry over leave.
• Life assurance, private medical insurance, critical illness insurance and health screening options.
• Flexible working arrangements to support responsibilities beyond the workplace.

Family and carers leave

• Enhanced family leave policies, including 26 weeks paid maternity and adoption leave, two weeks paid paternity/partner leave and shared parental leave.
• Up to 2 paid additional days leave for significant caring responsibilities.

Learning and development

• Structured development schemes supporting progression toward professional chartership.
• Fast‑tracked chartership reviews, mentorship, hands‑on experience and tailored training opportunities.

We are committed to ensuring that our recruitment practices are barrier‑free and inclusive for all candidates. We welcome applications from all sectors of the community and encourage applicants who may not meet every requirement to apply.

Find out more about our approach to Diversity, Equity & Inclusion:

Our Equal Opportunities Policy:
Equality, diversity and inclusion - Mott Mac Donald