Diesel Field Service Engineer

About the role

Rehlko is looking for a Generator Service Engineer to support critical power infrastructure in data centre environments. Working mainly from fixed customer sites, you will maintain standby power systems so that mission-critical facilities stay reliable and running.

Key responsibilities

• Carry out planned preventative maintenance and reactive repairs on standby power generation equipment in data centres.
• Diagnose faults and complete breakdown repairs to keep equipment reliable and up.
• Work on fixed customer sites supporting critical power infrastructure and emergency backup systems.
• Build strong working relationships with site teams and customers, delivering professional, responsive service.
• Work closely with Coordinators and Service Managers so maintenance schedules and reactive works are done efficiently.
• Record all work accurately in the company's management system.
• Take part in the site or regional on-call rota (about 1 in 6).
• Follow company health and safety, environmental and quality management systems.

Required profile

• Mechanical or Electrical Engineer with time served, or qualified to NVQ Level 3 (or equivalent).
• Previous experience on generators, critical power systems or similar equipment is highly advantageous.
• Experience in data centres, critical environments, facilities management or industry is beneficial.
• Able to complete risk assessments and work safely in high-compliance environments.

Required skills

• Good knowledge of mechanical and electrical systems, including engines and alternators.
• Strong fault-finding and diagnostic skills.
• Excellent communication skills, confident with customers, site teams and internal stakeholders.
• Comfortable in a fast-paced environment where reliability and attention to detail matter.

What we offer

• Competitive hourly rates, dependent on experience, with overtime after 40 hours and a realistic OTE of £55,000 - £65,000.
• 10-15% uplift in base pay depending on postcode, plus on-call standby allowance.
• 33 days' holiday including bank holidays.
• Training and upskilling, private healthcare, death in service benefit and employee assistance programme.
• Long-term career progression in a safe, inclusive workplace.