Gas Engineer / Heating Engineer
Install, service, and repair gas appliances, central heating systems, and boilers — a role requiring Gas Safe Register certification and carrying a high level of public safety responsibility.
High
Moderate
3–4 years via apprenticeship or college route; ACS assessment required before independent gas work
Level 3 NVQ + ACS (Accredited Certification Scheme) for Gas Safe Register
typical
What you do
Gas engineers install and maintain domestic and commercial gas appliances including boilers, cookers, and fire heaters. You commission new-build central heating systems, service boilers annually, diagnose faults, carry out safety checks on properties, and respond to gas emergencies. All gas work must be carried out by Gas Safe Registered engineers. Many gas engineers also hold qualifications in oil heating and heat pump installation, giving access to the rapidly growing renewable heating market.
Why this career is resilient
Gas Safe registration is a legal requirement for all gas work in the UK — it is not possible to cut costs by using unqualified labour. The 17 million gas-heated homes in the UK require annual servicing. The UK government's decarbonisation programme will require retrofitting millions of homes with heat pump and hybrid systems over the next 15 years — creating new demand for heating engineers with renewable energy skills rather than eliminating existing work.
A typical day
A self-employed gas engineer's day typically includes a morning boiler service, a call-out to diagnose a no-heat fault, a new boiler installation in the afternoon, and administration (Gas Safe registration updates, invoicing) in the evening.
Routes in
Apprenticeship
Earn while you learn: work with an employer and study part-time, leading to a nationally recognised qualification. Typically funded by the government and your employer.
Full-time college course
Study full-time at a further education college, usually for 1–2 years. You will need to fund yourself or apply for a student loan (available for Level 4+ courses).
Pay and costs
Earning potential: Employed gas engineers earn £32,000–£48,000. Self-employed heating engineers commonly earn £50,000–£80,000+. Heating and renewables specialists in high-demand areas can exceed £80,000.
Training costs: Apprenticeship: no upfront cost. College route: £2,000–£4,000 for Level 2 + 3 plumbing and gas qualifications. ACS assessment: £600–£1,200. Gas Safe registration: ~£120/year.