Senior Mechanical Engineer

Description

The Senior Mechanical Engineer will lead mechanical design and delivery for water and wastewater projects across the UK water market, ensuring that mechanical aspects are fully integrated from concept through construction and commissioning. The role contributes to environmental and community outcomes by improving the efficiency and effectiveness of water and wastewater treatment systems.

• Lead mechanical design of water and wastewater infrastructure and non‑infrastructure projects through all phases, including P&IDs, valve schedules, pump calculations, safe access, lifting arrangements, and above‑ground pipework layouts.
• Coordinate with electrical, civil, geotech and process designers to deliver designs on programme, within budget and to framework quality specifications.
• Collaborate with commercial, operations and construction teams to develop efficient, practical, and safe solutions during design, construction and beyond.
• Engage positively with clients, manage relationships and adopt a one‑team approach to support their objectives.
• Support the mechanical engineering team by coaching, mentoring engineers and identifying appropriate resources for projects.
• Participation in Advanced Employee Networks supporting LGBTQ+, gender, race, ethnicity, disability, and parents/carers communities.

Requirements

• Degree in Mechanical Engineering or a related field.
• Chartered or incorporated member of a professional institution (e.g., ICE, IMechE) or equivalent experience.
• Effective communication skills with team members and stakeholders.
• Methodical approach to problem solving.
• Valid driving licence and willingness to travel to sites across the operational region.

Benefits

• MMB matches employee pension contributions between 4.5% and 7% and offers annual bonus schemes.
• Payment of professional institution subscription costs.
• Minimum of 33 days holiday (including public holidays) with flexible buying, selling or carrying over of leave.
• Access to life assurance, private medical, critical illness insurance and health screening options.
• Flexible working arrangements and support for responsibilities beyond the workplace.
• Enhanced family and carers leave: 26 weeks paid maternity/adoption, 2 weeks paid paternity/partner, option for shared parental leave, and up to 2 additional paid days for significant caring responsibilities.
• Structured learning and development schemes, fast‑tracked chartership support, mentorship, hands‑on experience and tailored training.

Training + Development

Interview process

Visa Sponsorship

Security clearance