Senior Mechanical Supervisor

We prefer to hiredirectly, and we will be in touch with our PSL Agencies if this role is eligible for release.

We do not accept speculative CVs from agencies. If speculative CVs are sent, no fee will be applicable – please direct all queries to the relevant Resourcing Partner.

Senior Mechanical Supervisor

Hampton, Middlesex

This role is central to delivering mechanical installation works across framework projects. As Senior Mechanical Supervisor, you’ll ensure safe, high‑quality installation, support efficient commissioning, and maintain strong coordination with Project Managers, MEICA Leads, subcontractors and commissioning teams.

You’ll be responsible for day‑to‑day supervision of mechanical works, ensuring compliance with client standards, supporting design development, and helping to deliver successful project handover. This role suits someone with strong water‑industry mechanical experience who enjoys problem‑solving, collaboration and leading teams on site.

What you'll be doing:

Mechanical Installation & Site Supervision

• Lead the mechanical installation works on assigned projects, ensuring safe systems of work.
• Ensure mechanical works meet programme requirements and support efficient commissioning.
• Supervise mechanical subcontractors, maintaining high standards of safety, quality and compliance.
• Review and authorise RAMS; conduct regular mechanical site safety inspections.
• Ensure all mechanical testing, inspections and documentation follow the Inspection & Test Plan.

Design, Quality & Technical Compliance

• Provide input to mechanical design requirements and specifications.
• Ensure all mechanical installation meets client specifications, Asset Standards and WIMES where applicable.
• Coordinate with specialist support functions (e.g., DSEAR, Technical Authors, Document Control).
• Ensure O&M information and records are complete and issued appropriately.
• Work closely with the MEICA/Commissioning team throughout commissioning stages.
• Maintain snagging lists and drive completion of outstanding works.
• Support reliability testing and integration with existing operational assets.
• Assist with operational and maintenance activities before takeover.

Planning, Coordination & Communication

• Ensure mechanical activities are aligned with the overall project programme.
• Attend commissioning meetings and support updates to the MEICA/Commissioning programme.
• Witness FAT testing as required.
• Collaborate closely with the client’s Asset Operations Team to support smooth integration.

About you:

The successful candidate should have:

• Previous experience in the water industry.
• Proven experience supervising mechanical installation through to successful project takeover.
• Strong understanding of water ‑ industry mechanical and electrical equipment.
• Experience leading teams on site and working directly with clients.
• Strong understanding of health, safety and environmental requirements.
• Good knowledge of water ‑ industry processes.
• Competence in Microsoft Office for reporting tasks.
• HNC in Mechanical Engineering.
• CSCS or ECS card.
• EUSR National Water Hygiene Card.
• SSSTS (minimum) or SMSTS (preferred).

The ideal successful candidate would have:

• First Aid at Work.
• Comp Ex (FxF or equivalent).

What We Can Offer in Return:

With an impressive order book of over £4.3 billion we are one of the industry’s leading principal contractors, affording you the opportunity to work on some of the UK’s most exciting projects offering you stability as well as the chance to stretch your capabilities and realise long held career goals. You will be joining diverse teams working at a high professional level with exceptional levels of commitment.

With an ambitious strategy, we’re poised for further growth and success, so if you’re committed, talented and enthusiastic, Galliford…