Mechanical Site Supervisor

Mechanical Site Supervisor
W12, West London
Permanent or Temp-to-Perm
£26.70 per hour (PAYE, JIB Rates) | £32–£35 per hour (Temporary)
Monday–Friday + Overtime Available (JIB Rates)
The Opportunity
We are recruiting for an experienced Mechanical Site Supervisor to support delivery on a £9m mechanical installation project within a major West London shopping centre.
This is a pre-commencement opportunity, with works starting on site in August, giving you the chance to play a key role from early stages through to completion. You'll be starting before this to assist with planning.
The project is expected to run for circa 18 months, with a strong pipeline of further works secured on-site, offering excellent long-term stability.
The Role
You will take full responsibility for mechanical site supervision, leading site activity and ensuring delivery aligns with programme, safety, and quality standards.
The role includes overseeing installation works involving commercial heating systems, including gas-fired boilers, alongside wider mechanical services.
You will manage a team of 10–14 operatives (including subcontractors and agency labour), while working closely alongside the electrical team (interface only—no direct management).
Responsibilities
* Supervise and coordinate mechanical installation works from early stages through to completion
* Oversee installation of HVAC and commercial heating systems, including gas-fired boilers
* Manage site teams (10–14 operatives) including subcontractors and agency labour
* Ensure delivery against programme, quality, and H&S standards
* Read and interpret technical drawings and schematics
* Interface effectively with electrical teams and wider site stakeholders
* Drive progress on-site and resolve issues proactively
* Support commissioning, testing, and full project handover
* Maintain a strong, compliant health & safety culture
Requirements
* Proven experience as a Mechanical Site Supervisor on commercial / retail projects
* Strong HVAC knowledge, including gas-fired boiler systems, LTHW, CW, and drainage
* Good understanding of building services (M&E)
* SSSTS (essential)
* Ability to read and interpret drawings and specifications
* Experience managing teams of labour and subcontractors
* Strong leadership, organisation, and communication skills
* Experience with BMS / controls (desirable)
* Relevant commercial gas experience / awareness highly advantageous
* Full UK working rights
What You’ll Get
* £26.70 per hour (PAYE, JIB aligned)
* £32–£35 per hour (temporary rate) with clear route to permanent
* Overtime paid at enhanced JIB rates (x1.5 / x2)
* Long-term project (18 months) with ongoing work beyond completion
* Opportunity to work on a major retail scheme with repeat projects on site
* Full JIB package on permanent including benefits and van (if required)
Apply
If you’re a Mechanical Site Supervisor with experience in commercial heating and boiler installations looking for a long-term role in West London, apply now