Field Service Engineer – Mobile Welfare Units

About the role

This is a full‑time, permanent position based in Liverpool, working from home but travelling to customer sites across the North West. You will be responsible for diagnosing, repairing and maintaining mobile welfare cabins that provide heating, power, water and sanitation for construction, civil engineering and events sites.

Key responsibilities

• Attend breakdowns and warranty/service jobs for mobile welfare units.
• Diagnose and repair generators, diesel engines, heating, water, waste and electrical systems.
• Interpret telemetry data remotely to prepare for on‑site visits.
• Perform routine servicing, oil changes, filter replacements and battery maintenance.
• Maintain towing, chassis, hydraulic lifts and structural components.
• Provide clear on‑site communication and customer education.

Required profile

• Proven multi‑skilled field service or plant/mechanic background (welfare units, generators, HGV, marine, motorhome, etc.).
• Experience with diesel engine fault‑finding and servicing (small industrial engines).
• Ability to work safely and independently at customer sites.

Required skills

• Generators and diesel engines (HATZ, Kubota, Lombardini, Perkins, Stephill).
• 12V/24V DC electrical systems and Victron inverter/MPPT kits.
• Diesel heater troubleshooting and rewiring.
• Lithium battery diagnosis, BMS behaviour and charge settings.
• Telemetry and remote monitoring (SIM/modem, Cerbo).
• Hydraulic power packs and solenoids for raising/lowering units.
• Towing, chassis, coupling and brake maintenance.
• Fabrication and structural repair of doors, hoods and panels.
• Solar panel and MPPT charge fault diagnosis.

What we offer

• Competitive salary based on experience.
• Home‑based base with a fully equipped service van.
• Opportunities to work across a variety of sites and technologies.