Site Manager - Mechanical

Alternative Heat Ltd; Greater London; On-site; GBP 50,000 - 70,000; Full time

Job summary

Alternative Heat Ltd. is seeking a Site Manager - Mechanical to lead on-site installation activities in London. You will work with the delivery team, interface with design and commercial colleagues, and ensure safe, compliant, and timely project execution.

You will monitor costs, manage variations, and ensure works are completed to programme and budget. Monday-Thursday 8am-5pm, Friday 8am-3pm, with a competitive salary dependent on experience.

Qualifications

• Experience leading on-site installation teams and coordinating multiple trades.
• Ability to develop and review RAMS and ensure HSEQ compliance.
• Strong budgetary discipline and change-management skills.

Responsibilities

• Ensure compliance with HSEQ policies and RAMS across the project.
• Coordinate activities with clients, contractors, and internal teams to deliver on time and within budget.
• Review drawings, procure plant/equipment, and manage subcontractors under JCT contracts.

Skills

On-site management

RAMS development

Stakeholder liaison

Budget control

Job description

Site Manager - Mechanical

Department: Contracts

Employment Type: Permanent - Full Time

Location: London

Reporting To: Project Manager

Description

What We Do: Operating from our advanced manufacturing facilities in Ireland, we specialise in the design, development, fabrication and delivery of innovative, sustainable and fully integrated offsite prefabricated solutions. Our engineered systems are manufactured in Ireland and deployed throughout the UK and Europe, supporting major commercial, industrial and mission-critical sectors. As one of Europe's leading providers of Offsite Manufacturing solutions, we partner with contractors and developers to deliver high-performance modular MEP systems for mission-critical data centre projects. Our expertise in offsite manufacturing enables us to improve program certainty, reduce on-site activity, enhance quality and accelerate project delivery, and support the continued growth of digital infrastructure across the UK and Europe.

Role Overview:

The successful candidate will be responsible for managing all installation activities on site, the candidate will be working alongside and in tandem with other Alternative Heat (AH) delivery team representatives and will be required to interface with various AH departments such as the design and commercial teams.

Job Title | Site Manager - Mechanical
Location | London
Hours | Monday-Thursday 8am-5pm and Friday 8am-3pm
Salary | Competitive Depending on Experience
Reporting to | Project manager

What You'll be Doing

Responsible for ensuring compliance with company HSEQ policies and procedures throughout the project, including the development and maintenance of accurate RAMS and the safe, efficient delivery of all works. The role involves liaising with clients, customers, contractors, supply chain partners and internal teams to coordinate project activities, procure plant and equipment in line with specifications, review design drawings and ensure compliance with current regulations. Working closely with the commercial team, responsibilities include monitoring material and labour costs, managing contract variations and monthly claims, and ensuring projects are delivered within budget and to the agreed programme. The role also involves surveying existing services, supporting the preparation of installation and as-installed drawings, compiling O&M manuals, managing subcontractors under appropriate JCT contracts, and collaborating with the wider MEP management, project delivery and Alternative Heat teams to ensure works are completed safely, efficiently and to the required standard. Additional duties may be undertaken as required by management.