We’re hiring for an experienced Mobile HVAC Engineer (Service & Maintenance) to join a specialist team supporting high-quality commercial contracts across London (ideally East) or the M4 corridor. You’ll be responsible for maintaining top-spec AC systems, chillers, AHUs, and mechanical plant across smart, well-managed sites. This is a field-based role with a mix of planned servicing and responsive maintenance — ideal for someone who takes pride in their work, communicates clearly, and enjoys being trusted to manage their own sites. What You’ll Be Doing You’ll be carrying out maintenance and repairs on VRV/VRF systems, splits, chillers, and AHUs from top manufacturers like Daikin, Mitsubishi, and Toshiba. That includes diagnosing faults, quoting and completing remedials, and handling all site documentation. You'll also represent the business professionally when speaking with clients, and occasionally support apprentices on-site. What You’ll Need to Have F-Gas Category 1 (C&G 2079) — essential C&G/NVQ Level 2 in Air Con & Refrigeration (preferred) Proven experience with VRV/VRF, splits, and ideally chillers or AHUs Confident communicator with solid site reporting skills Comfortable working independently and across multiple sites Full UK driving licence Ideally based near East London or Swindon What’s in It for You £46,000 – £50,000 base salary (depending on experience) Regular paid overtime Company van (with personal use) 25 days holiday 8 bank holidays Phone, laptop, and specialist tools provided Manufacturer and internal training courses Career progression opportunities Company pension scheme Supportive, engineer-first work culture What’s Next If this sounds like your kind of role and you're ready for a move, just send over whatever version of your CV you’ve got handy — no need to polish it. The van, tools, and training are ready when you are.