Mobile Service Engineer - Air Conditioning / HVAC An established and reputable HVAC contractor specialising in rail and critical infrastructure projects is looking to recruit an experienced Mobile Air Conditioning Service Engineer to join their growing London-based service team. This is a mobile, service-focused role covering central London and surrounding areas, working across high-profile and technically interesting sites. A large proportion of the work is within the railway environment, with full rail training, competencies, and certification provided. The Role As a Service Engineer, you will carry out planned preventative maintenance, reactive repairs, and minor planned works across a range of critical and high-profile sites including signal centres, data centres, stations, maintenance depots, train care depots, and remote track-side locations. The role involves servicing and maintaining a variety of HVAC and mechanical systems such as split systems, VRV/VRF, chillers, AHUs, LTHW, chilled water, and ventilation plant. The position is predominantly service and maintenance focused, with engineers not typically required to undertake installation works. Package Salary: Up to £40,000-£45,000 Overtime: Time and a half Double time for nights and bank holidays On-call rota: 1 week in every 8 (approx.) £125 standby payment per week Minimum 4 hours paid per call-out Working hours: Door-to-door working 9.5-hour minimum day 30 minutes unpaid travel each way 30 minutes unpaid lunch Holiday: 22 days annual leave Plus bank holidays Plus an additional birthday day off Company van & fuel card Company smartphone Used for calls, emails, and electronic job management system Specialist refrigeration tools provided Requirements Minimum City & Guilds NVQ Level 2 / Part 2 in Air Conditioning F-Gas certification (essential) Proven service experience on HVAC systems such as splits, VRVs, chillers, AHUs, LTHW, or chilled water Full UK driving licence Willingness to work across London and attend rail/track-side locations (training provided) Ability to supply own hand tools, including: General tool kit Thermometer Multimeter with amp clamp PASMA and IPAF certifications are advantageous but not essential. Additional Information Overtime is expected as part of the role; occasional Saturdays or nights may be required, though not frequently Adequate rest periods are always provided A railway medical, drugs & alcohol screening, and DVLA licence check are required prior to any formal job offer WR HVAC | M&E are 1 recruitment partner for HVAC jobs. Our customers include a range of large and small M&E companies, manufacturers and suppliers of heating, ventilation, air conditioning and refrigeration equipment. We recruit UK wide for sales, management and technical jobs. WR is acting as an Employment Agency in relation to this vacancy