Experienced Commercial Plumber / Mechanical Engineer needed for mobile commercial maintenance across London and the M25 – £50K overtime van. Mobile Mechanical / Plumbing Engineer – Commercial Buildings Location: Central London & M25 (Mobile Role) Salary: £50,000 Plus, Overtime (paid at time & a half) Hours: Monday to Friday, 8:00am – 5:00pm (flexibility expected for travel) Type: Full-time, Permanent About the Role We’re looking for a mechanically-biased Commercial Plumbing Engineer to join a growing building services team working across Central London and the M25 area. You’ll be responsible for carrying out both planned and reactive maintenance across a variety of commercial sites. This is a mobile role suited to someone confident working independently, using their initiative to diagnose and resolve issues on-site. Key Responsibilities * Carry out works following water risk assessments * Replace TMVs, valves, and main pump sets * Diagnose and repair FCUs and other mechanical systems * Perform system modifications and new installations * Ensure all plumbing and mechanical systems are operating efficiently * Liaise directly with clients, subcontractors, and suppliers * Maintain tools and equipment to a professional standard What We’re Looking For * NVQ Level 2 or above in Plumbing/Heating * Full UK Driving Licence (max 3 points) * Unvented Hot Water Certificate required * Heat Pump qualification – desirable * Solid mechanical knowledge of heating systems and components * Minimum 3 years’ commercial plumbing experience * Capable of working independently and taking ownership of tasks What’s in It for You * £50 to £55,000 basic salary (depending on experience) * Plenty of overtime available – paid at time and a half * No on-call rota * Company van, fuel card, and mobile phone provided * Company pension optional discounted health insurance * 22 days holiday bank holidays * Career development, training, and upskilling opportunities * Small, flexible company culture – no corporate nonsense If you’re a hands-on engineer who takes pride in doing the job right and wants to be part of a growing, straightforward team — we’d like to hear from you