Generator Service Engineer - Data Centres

About Rehlko

Rehlko is a global leader in power and energy resilience. Formerly known as Kohler Energy, Rehlko has been at the forefront of powering homes, businesses, critical infrastructure, and industries worldwide for over a century.

As part of an exciting new chapter, WB Power Services has become Rehlko. This transition marks our evolution into a true Original Equipment Manufacturer (OEM), enabling us to design, manufacture, install, maintain, and support complete power generation solutions from concept through to commissioning and lifecycle support.

While our name has evolved, our culture remains the same. We continue to operate with the values, agility, and people-first approach of a family business, backed by the scale, innovation, and investment of a globally recognised organisation. This creates exciting opportunities for our employees to work on larger projects, access industry-leading training, and play a key role in shaping the future of critical power infrastructure.

Due to continued growth within our Data Centre Division, we are looking to recruit an experienced Generator Service Engineer to support the maintenance and reliability of standby power systems across mission-critical data centre environments. This is an excellent opportunity to join a highly specialised team working within one of the fastest-growing sectors in the power generation industry.

The Role

As a Generator Service Engineer, you will be responsible for maintaining, servicing, and supporting standby diesel power generation systems that protect some of the UK''s most critical facilities. Working predominantly from fixed customer sites, your focus will be ensuring the highest levels of reliability, availability, and performance of power generation equipment.

Key Responsibilities

• Carry out planned preventative maintenance on standby diesel generators and associated equipment.
• Diagnose and repair mechanical and electrical faults to minimise downtime.
• Complete reactive breakdowns and emergency call-outs to agreed service standards.
• Perform inspections, testing, and health checks on generators, engines, alternators, control systems, and ancillary equipment.
• Support critical power infrastructure within live data centre environments.
• Ensure all maintenance activities are completed in line with customer and site requirements.
• Accurately complete service reports, inspection records, and maintenance documentation.
• Build strong relationships with customer engineering teams and site stakeholders.
• Work closely with Service Coordinators and Technical Support teams to deliver efficient service.
• Maintain the highest standards of health, safety, quality, and environmental compliance.
• Participate in the on-call rota (approximately 1 in 6).

The Person

• NVQ Level 3 qualification (or equivalent) in Mechanical, Electrical, Automotive, Plant, or a related engineering discipline.
• Experience servicing, maintaining, or repairing generators, power systems, plant equipment, engines, or similar electromechanical machinery.
• Strong mechanical and electrical fault-finding skills.
• Good understanding of diesel engines, alternators, and control systems.
• Experience within data centres, critical environments, industrial sites, facilities management, or utilities is advantageous.
• Knowledge of electrical testing and diagnostic procedures.
• Proactive approach to problem-solving with strong attention to detail.
• Able to work independently and as part of a wider engineering team.
• Excellent communication skills and commitment to delivering outstanding customer service.

What We Can Offer You

• Competitive hourly rates based on experience and qualifications.
• Overtime available after 40 hours per week.
• Realistic OTE of -50,00065,000+ through overtime and on-call opportunities.
• On-call standby allowance.
• 33 days holiday including bank holidays.
• Company van and fuel card.
• Private healthcare and life assurance (Death in Service).
• Manufacturer training, ongoing development, pension scheme, Employee Assistance Programme, and excellent career progression opportunities.