Mechanical Site Supervisor – Building Services (HVAC, Pipework, Plantroom)

Location: London & Home Counties Salary: £55,000 – £65,000 + Company Van + Bonus + Benefits

A well-established Mechanical & Electrical Building Services contractor is seeking an experienced Mechanical Site Supervisor to oversee installation projects across London and the Home Counties.

The company delivers mechanical building services installation projects directly for end-user clients, covering commercial offices, education, healthcare environments, heritage buildings and high-end residential developments.

This opportunity would suit a Mechanical Supervisor, HVAC Supervisor or Mechanical Foreman with strong experience in pipework, plantroom installations and HVAC systems who enjoys leading engineers on site and delivering high-quality building services projects.

The Role – Mechanical Site Supervisor

As Mechanical Site Supervisor, you will take responsibility for supervising and coordinating mechanical installation teams on site. Team sizes typically range from 10–25 engineers, depending on project scale.

Projects are frequently delivered in live or occupied buildings, requiring strong organisation, clear communication and a professional client-facing approach.

You will act as the senior mechanical representative on site, ensuring installations are delivered safely, on programme and in line with industry standards.

Projects You’ll Be Working On

Typical projects include:

Mechanical plantroom installations and HVAC upgrades

Commercial office fit-outs and refurbishments

Typical project values range from £200k – £2m, providing a varied portfolio of technically interesting mechanical building services installations across London.

Mechanical Systems You Will Oversee

Installation and coordination of mechanical building services systems, including:

HVAC and ventilation systems

Mechanical plant installations including boilers, pumps, chillers, AHUs and heat pumps

Heating and chilled water pipework systems

Domestic hot and cold water services

Plantroom mechanical installations

Mechanical distribution systems within commercial buildings

Key Responsibilities

Supervise mechanical installation teams across HVAC, pipework and plantroom works

Plan labour resources, installation sequencing and site logistics

Ensure mechanical building services installations meet project specifications and quality standards

Liaise with clients, main contractors, project managers and consultants

Ensure works comply with health & safety regulations and company procedures

Monitor installation progress and assist with commissioning preparation

Coordinate subcontractors and specialist engineers

Provide progress updates and site reports as required

What We’re Looking For

Minimum 5 years’ experience supervising mechanical building services installations

Strong technical knowledge of HVAC systems, pipework installations and plantroom equipment

Experience managing mechanical site teams of 10–25 engineers

Previous experience working for a Mechanical Contractor or M&E Building Services contractor

Professional and confident communicator comfortable in client-facing environments

SMSTS or SSSTS, CSCS, and Asbestos Awareness desirable

Full UK Driving Licence

Ideal Background

You may currently be working as a:

Mechanical Site Supervisor

HVAC Supervisor

Mechanical Foreman

Mechanical Site Manager

Senior Mechanical Engineer looking to step into a supervisory role

Within a Mechanical Contractor or M&E Building Services Contractor.

Why Join This Company

You will be joining a well-established building services contractor with a strong reputation for delivering high-quality mechanical and electrical installations across London and the South East.

The company specialises in HVAC systems, mechanical plant installations, building services upgrades and commercial fit-out projects, working closely with consultants, architects and end-user clients to deliver technically complex projects in demanding environments.

A strong focus on professionalism, safety and long-term client relationships has resulted in a consistent pipeline of repeat business and secured projects, providing stability and long-term career opportunities for employees. See Climate FM for the type of services delivered.

Salary & Benefits

£50,000 – £65,000 depending on experience

Company van and fuel/credit card

Pension scheme

20 days holiday plus statutory

Discretionary bonus

Long-term career progression opportunities

Interview Process

Initial Teams interview, followed by face-to-face meeting if required

Strong candidates may proceed directly to final interview

Location

Ideally based within London or the Home Counties

‘INDLON’

We act as an Employment Agency/Business with regards to this vacancy. As an Equal Opportunities employer we welcome applications regardless of race, gender, nationality, ethnic origin, sexual orientation, religion, marital status, disability or age. All applicants are considered on the basis of their merits and abilities for the job