Mechanical Service Engineer

Job Title: Mobile Mechanical Service Engineer (HVAC/AHU) – Electrical Qualified Location: London (99% within M25) Salary: Up to £48,000 per annum + overtime + standby allowance Contract Type: Permanent, Full-time Working Hours: 8:00am to 5:00pm Call-Out Rota: 1 week in 7 Overview Valoris Group is recruiting for a Mobile Mechanical Service Engineer with a strong HVAC and AHU focus, who is electrically qualified to support a growing building services provider across London and the M25. This field-based role is suited to an engineer who is primarily mechanically led in day-to-day work across plant and HVAC systems but holds solid electrical qualifications to support safe isolation, fault finding, inspection, and compliance tasks. Role Responsibilities Mechanical & HVAC Maintenance (Primary Focus) Deliver planned, reactive, and statutory maintenance on HVAC plant and mechanical systems across client sites. Service, fault find, and maintain Air Handling Units (AHUs), Fan Coil Units (FCUs), ventilation systems, pumps, motors, and associated mechanical plant. Carry out belt changes, bearing replacements, filter changes, lubrication, and general mechanical servicing. Diagnose faults across mechanical plant including airflow issues, vibration, and system inefficiencies. Maintain and repair mechanical components linked to heating, ventilation, and chilled water systems. Work on plant room equipment including valves, actuators, and pipework systems. Electrical Duties & Compliance (Qualified Support Role) Carry out safe isolation of mechanical plant and electrically driven equipment. Support electrical fault finding on motors, control panels, and associated HVAC systems. Conduct electrical inspection, testing, and compliance tasks where required. Complete minor electrical works linked to mechanical plant maintenance. Produce accurate certification and documentation including EICRs, test results, and remedial reports. Ensure all works comply with 18th Edition Wiring Regulations (BS7671) and health and safety standards. Inspection & Operational Delivery Attend multiple sites as directed by the Service Desk. Identify and report remedial works and compliance issues. Respond to emergency callouts and complete urgent repairs efficiently and safely. Provide clear updates and technical guidance to clients on-site. Maintain accurate service records using mobile job management systems. Participate in the on-call rota and provide occasional out-of-hours support when required. Essential Qualifications NVQ Level 3 in Electrical Installation or Maintenance 18th Edition Wiring Regulations (BS7671) City & Guilds 2391 Inspection & Testing (or equivalent) Full UK Driving Licence Desirable Qualifications HVAC or mechanical engineering qualifications F-Gas awareness IPAF and/or PASMA Experience working with BMS interfaces and control systems Experience Required Minimum 3 years experience working within building services maintenance Strong hands-on experience working on HVAC systems, AHUs, FCUs, pumps, and ventilation plant Electrically qualified with experience in isolation, testing, and fault finding Experience working across commercial environments Experience delivering both planned preventative maintenance and reactive callouts Previous mobile role experience advantageous Skills & Competencies Strong diagnostic and fault-finding ability across HVAC and plant systems Confident working on electrically driven mechanical equipment Ability to interpret mechanical drawings and electrical schematics IT literate and confident using mobile job management systems Clear communication and professional client-facing approach Ability to work independently and as part of a wider service team Personal Attributes Reliable with a strong work ethic Adaptable and flexible to operational needs Customer-focused and professional Team player with a proactive mindset Physical Requirements Physically fit and comfortable lifting equipment Able to work at height and in confined spaces Willingness to travel across multiple sites within the M25 Package & Benefits Salary up to £48,000 per year Overtime paid at time and a half or double time £150 standby allowance (1 in 7 call-out rota) 25 days annual leave + bank holidays Company pension Generous sick pay and accident insurance Life assurance (2x salary) Private GP access and Employee Assistance Programme Annual eye care reimbursement Loyalty bonus after 2 years service Ongoing training, mentoring, and development support Reward and recognition schemes Company events Eligibility Must have the right to work in the UK Full UK Driving Licence required