We are recruiting for an experienced Mobile Commercial Gas Engineer to join a leading facilities management provider working on a long-term public sector contract. This is a mobile field-based role covering South London, responsible for delivering planned maintenance and reactive repairs across a high-volume of sites. You will be working on a critical public sector contract supporting multiple sites, each with commercial kitchens, dormitories, and associated building services infrastructure. Key Responsibilities Service, maintain, and repair commercial gas systems Fault-find and diagnose breakdowns across gas plant and heating systems Work on boilers, water heaters, pipework, gas air heaters, and radiant tube heaters Deliver planned preventative maintenance (PPM) and reactive works Carry out minor installation and remedial works Produce technical reports, job sheets, and compliance documentation Identify and quote for remedial works and lifecycle replacements Ensure all work complies with Gas Safe regulations, RAMS, and H&S standards Liaise with contract teams and client representatives Candidate Requirements Essential Commercial Gas qualifications (Gas Safe registered) Strong background in gas servicing, maintenance, and fault-finding Experience in building services or FM environments Full UK driving licence Highly Desirable Experience working on public sector or critical infrastructure contracts Multi-skilled background (mechanical / electrical awareness) Experience working with high-volume PPM/reactive workloads Strong reporting and client-facing communication skills Package & Benefits 25 days holiday Company Van provided OOH call-out rota with enhanced pay (£100 minimum / 4 hours uplifts) Death in service benefit Sick pay after probation Long-term stable contract Parking available at all sites