UPS Engineer / Service Engineer/ Customer Service Engineer to join a global critical power company. The UPS Engineer / Service Engineer / Customer Service Engineer will be responsible for commissioning, maintaining, repairing, and occasionally modifying power protection products. The role requires flexibility, as engineers work on a 5-from-7-day contract, including weekends and occasional night shifts. The successful UPS Engineer / Service Engineer/ Customer Service Engineer will ideally have experience in a field service-based role with good knowledge of UPS systems or power protection products. Package Up to £45,000 15% shift allowance Overtime (1.25x hourly rate) On-call allowance (£45/day) Company Van - work and private Engineering tools provided 20 days annual leave bank holidays Key Responsibilities: The UPS Engineer will perform commissioning, servicing, and repair of battery-backed rotary UPS systems, diesel UPS systems, static UPS systems, and frequency converters (including 400Hz aircraft ground power equipment). Diagnose and troubleshoot faults on UPS systems, power rectifiers, and inverter drives Travel to customer sites across the UK and occasionally Europe to provide expert technical support Ensure timely completion of all documentation, reports, and electronic submissions. Participate in an on-call rotation (1 week on-call every 7-10 weeks). Maintain a high level of professionalism, especially when working in sensitive financial and government establishments. This is a remote role, but the ideal person will be located in a 25 mile radius of the M25 or within the M225.Key Requirements: Prior experience as a Service Engineer, Electrical Engineer, UPS Engineer, Field Service Engineer, Service Technician, Electrical Systems Engineer or similar within electrical engineering / critical power. Electrical engineering qualification, electrical degree or UPS System Certification or similar is required. The ideal person will be located in a 25-mile radius of the M25 or within the M25. Willingness to undergo credit and criminal background checks for clearance requirements for sensitive customer sites. Clean full UK driving licence