Generator Field Engineer

About Rehlko

Rehlko is a global leader in power and energy resilience. Formerly known as Kohler Energy, Rehlko has continually shaped the way the world powers homes, industries, and critical infrastructure.

As part of this exciting growth, WB Power Services has now become Rehlko. This transition marks our evolution into an OEM, allowing us to design, build, and deliver complete power solutions from the ground up. It’s a transformation that strengthens our technical capability, expands our product range, and deepens the value we offer to our clients.

We retain the strong, values-led foundation of a family business, while being empowered by the scale, resources, and global vision of Rehlko. For our people, this means new opportunities, bigger projects, and a chance to shape the future of resilient, sustainable energy.

The Role

As a Hire Field Service Engineer, you'll spend most of your time on customer sites, ensuring our hire fleet is installed, maintained, and operating safely and efficiently. You'll support everything from routine servicing and fault finding to temporary power installations and emergency breakdown response.

Key Responsibilities

• Installation, commissioning and decommissioning of hire generators and temporary power equipment.

• Planned servicing and maintenance of rental generators and associated equipment.

• Diagnosing and repairing mechanical and electrical faults both on-site and in the field.

• Supporting temporary power infrastructure projects, including cabling, fuel systems and distribution equipment.

• Carrying out load bank testing, mains failure testing and operational checks.

• Completing pre-hire and post-hire inspections to maintain fleet reliability.

• Producing accurate service reports and job documentation.

• Working closely with Hire Desk, Operations and Service teams to deliver excellent customer service.

• Participating in an on-call rota and responding to emergency call-outs when required.

The Person

We're looking for a practical, customer-focused engineer who enjoys working independently and solving problems in the field.

Skills & Experience

• NVQ Level 3 qualified (or equivalent) in Mechanical, Electrical, Plant, Automotive, HGV or Agricultural Engineering.

• Previous experience working on generators, plant machinery, powered access, HGVs, construction equipment or similar.

• Strong mechanical and electrical fault-finding skills.

• Understanding of diesel engines, alternators and control systems.

• Comfortable working at customer sites and managing your own workload.

• Flexible regarding overtime, on-call commitments and occasional overnight stays.

• Full UK driving licence.

Generator experience is desirable but not essential, as full product training will be provided.

What We Can Offer You

• Competitive hourly rate depending on experience.

• Overtime paid after 40 hours with realistic OTE of £55,000-£65,000.

• On-call standby allowance.

• Company vehicle and fuel card.

• 33 days holiday including bank holidays.

• Industry-leading training and ongoing development.

• Private healthcare.

• Death in Service benefit.

• Employee Assistance Programme.

• Excellent long-term career progression opportunities