Field Service Engineer

A Field Service Engineer is required to join a reputable company in Bourne, Lincolnshire. This full-time, permanent role is depot-based, with duties involving travel to customer sites nationwide. The position involves attending to mobile welfare units, diagnosing faults, and repairing generators, power, heating, water, and waste systems. The successful candidate will work safely and unsupervised, aiming for first-time fixes. This van-based role covers breakdowns and warranty service work.

A competitive salary is offered, dependent on experience. Applicants should possess strong diagnostic skills and prior experience in a similar mobile engineering capacity. An excellent opportunity for an experienced Field Service Engineer – Mobile Welfare Units to join a well-established company. Job Type: Full-Time, Permanent Salary:
Competitive Salary, Depending on Experience.

Location:

Bourne, Lincolnshire – Depot Based.

They are a market leader in the repair and maintenance of towable and static cabins that keep site teams warm, fed and safe on construction, civils and events sites nationwide.

To attend, diagnose and repair mobile welfare cabins in the field — restoring generators, power, heating, water and waste systems to full working order, first-time wherever possible, while working safely and unsupervised at customer sites. The role is van-based and mobile, covering breakdowns and warranty/service work across customer and hire-fleet sites. A large share of faults are diagnosed remotely (via unit telemetry) before attending, so the engineer must be comfortable interpreting remote data and arriving prepared.

• Generators / diesel engines
  - Oil pressure & oil-change faults, fuel systems, exhaust/DPF, alternator, AVR, governor, glow, E-stop, servicing. Engines: HATZ, Kubota, Lombardini, Perkins, Stephill (Boss L48/L70/L100 units).
• Plumbing, water & waste
  - Frozen/burst pipes, tanks, UV filters, water pumps, toilets, waste-level sensors, leaks.
• Electrical & power - 12/24V DC systems, Victron kit (inverters, Cerbo, MPPT/solar), fuses, relays, wiring looms, sockets, PIR lighting, no power / dead-console faults, electrical-test compliance.
• Diesel heaters
  - Parking/diesel heaters — glow-pin and fuel-pump failure, re-priming, rewiring, thermostats, frost-related no-heat.
• Batteries
  - Lithium battery diagnosis (100/200
  
  Ah), BMS behaviour, Victron charge settings, deep-discharge recovery, charge/hold faults.
• Telemetry / comms
  - Units not updating/communicating — SIM/modem, Cerbo, remote-monitoring diagnosis and SIM replacement.
• Towing & chassis
  - Lifting rams/pins, wheels-down locking, coupling, brakes, tyres — getting units mobile.
• Hydraulics
  - Power packs, rams, solenoids for raising/lowering units.
• Fabrication
  - Doors, door closers, hoods, structural repair.
• Solar
  - Panels and MPPT charge faults.

Roughly 1 in 5 reported faults turn out to be user error — so customer education, clear on-site communication and honest reporting matter as much as the wrench work.

Essential:

• Proven multi-skilled field service / plant / mobile-mechanic background (welfare units, generators, plant, HGV, marine, motorhome/leisure, or similar).
• Diesel engine fault-finding and servicing (small industrial engines — HATZ, Kubota, Lombardini, Perkins or equivalent).
• 12V / 24V DC electrical competence — fault-finding wiring, fuses, relays, inverters, charging systems using a multimeter.
• Confident reading fault data / telemetry and working from remote diagnostics.
• Practical plumbing / water-system repair skills.
• Strong problem-solving and first-time-fix mindset; comfortable working alone and unsupervised.
• Full UK driving licence; B+E (trailer/towing) entitlement or willingness to obtain.
• Good customer-facing manner and clear written job reporting.

Highly Desirable:

• Electrical qualification — City & Guilds 2391 (Inspection & Testing) and/or 18th Edition (BS 7671); PAT competence.
• Experience with Victron energy systems (Cerbo GX, Multi Plus inverters, MPPT, VRM) and lithium/BMS battery systems.
• Diesel parking/air heater experience (Webasto/Eberspächer-type).
• Hydraulics (power packs, rams,…