Commercial Gas Engineer

Apex Engineering Solutions; Greater London; On-site; GBP 50,000 - 60,000; Full time

Job summary

A specialist utility services company in London is seeking a Commercial Gas Engineer to take charge of installation, maintenance, and safety checks on heating systems. Applicants should have valid commercial gas qualifications and experience in commercial heating systems. The role offers a salary of £50k – £60k per annum, along with a KPI-related bonus and various benefits including a van, pension, and annual leave.

Benefits

£6k KPI-related bonus

Van & fuel card

Pension

25 days annual leave

Overtime

Training for gas qualifications

Qualifications

• Valid Commercial and Domestic Gas Qualifications.
• Experience working with communal/district heating schemes.
• Proven experience on commercial heating systems.

Responsibilities

• Perform maintenance on heating and cooling systems.
• Conduct fault diagnosis and repairs on heating systems.
• Ensure health and safety compliance on site.
• Liaise with clients and contractors during projects.

Skills

Valid Commercial and Domestic Gas Qualifications

Understanding of communal/district heating schemes

Experience working on commercial heating systems

Good communication and customer service skills

Ability to work independently

Attention to detail

Full UK Driving Licence

Job description

Apply by: 31/01/2026

Min Experience: years

Overview

We are currently recruiting for a Commercial Gas Engineer on behalf of a specialist utility services company who provide installation, maintenance, metering and billing services to customers throughout the UK.

Operating for over 15 years now, they are a fast growing reputable company with over 70 employees. They are an award‑winning heat network services provider and specialise in Heat and Cooling Networks, also known as communal energy or district heating schemes.

As a Gas Safe Heat Network Engineer, you will be responsible for the installation, maintenance, and efficient operation of heat network equipment, including boilers, chillers, fan‑coil units, HIUs, valves, meters, PAYG devices, and metering systems deployed within client developments.

Working closely with supply partners and following documented workflows and processes, you will carry out maintenance, repairs, commissioning, and commercial gas safety checks on commercial heating systems. You will also handle fault detection, repairs, and maintenance of heat metering equipment within the domestic heating sector, working on multi‑million‑pound construction projects as well as residential properties.

This is a permanent position covering London, working Monday to Friday for 37.5 hours per week. The basic salary is £50k – £60k per annum depending on experience. A £6k KPI‑related bonus is available – up to £1,500 is paid quarterly after successful completion of a 6‑month probation. Other perks include a van & fuel card (usable for personal use), pension, 25 days annual leave plus bank holidays, overtime, and development & training toward commercial gas qualifications.

Note: Apex Resourcing Solutions are acting as an Employment Agency.

Responsibilities

• Maintenance of Heating and Cooling Systems:
  Perform responsive maintenance on a wide variety of heating and cooling systems, typically serving multi‑story private and social housing blocks.
• Responsive and Preventative Maintenance:
  Conduct fault diagnosis, repairs, and renewal works, along with planned preventative maintenance tasks.
• Mechanical Maintenance:
  Routine maintenance of boilers, pumps, heat exchangers, pressure vessels, valves, and domestic components such as Heat Interface Units (HIUs), heat meters, two‑port valves, and associated metering and billing systems.
• Comprehensive Energy System Work:
  Oversee maintenance from traditional heating and cooling plants to domestic HIUs and metering/billing systems.
• Health & Safety Compliance:
  Adhere to relevant Health & Safety practices on‑site and ensure all work complies with legislation and service level agreements (SLAs).
• Heating and Cooling Equipment Maintenance:
  Maintain equipment associated with Low Temperature Hot Water (LTHW) heating and chilled water systems.
• Use of Technology:
  Use laptops and tablets to commission metering equipment, update records, and maintain systems.
• Problem Solving and Communication:
  Troubleshoot and resolve on‑site issues, coordinating with other trades and the main contractor.
• Client and Contractor Liaison:
  Represent the company on‑site, liaising with clients, principal contractors, consultants, and heating/plumbing sub‑contractors.
• Site Surveys and Installations:
  Conduct site surveys and assist the Delivery Team with the installation of new systems.
• HIU and Metering Equipment:
  Replace, maintain, and service HIUs, and install/replace heat meters on district heating networks (primarily in occupied homes).

Skills & Attributes

• Valid Commercial and Domestic Gas Qualifications.
• Understanding of communal/district heating schemes and experience working within the service industry.
• Previous experience working on commercial heating systems.
• Good communication and customer service skills.
• The ability to work independently and use your own initiative.
• An eye for detail and a desire to work to a very high standard.
• Full UK Driving Licence.