Field Service Engineer

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:

Chelmsford

Home Based

Working in the Field. About The Company: 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. About The Role: 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. What the Role Actually Deals With: 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 (100/200Ah), 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. Candidate Requirements 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, MultiPlus inverters, MPPT, VRM) and

lithium/BMS

battery systems. Diesel

parking/air heater

experience (Webasto/Eberspcher-type). Hydraulics

(power packs, rams, solenoids). Fabrication repairs. Solar PV, and basic IT/comms (SIM, modem, routers) familiarity. Relevant safety tickets (CSCS Card, first aid, working at height, manual handling). Personal Attributes

Self-motivated and reliable

the customer's day-rate is stopped until the unit works again. Methodical and safety-first, especially around live electrics, fuel and lifting operations. Resilient and adaptable

outdoor, all-weather, sometimes remote sites. Honest reporter

records what was found and done, including when a fault is user error or unresolved. Working Conditions

Field-based, mobile role with company van and tools. Regional travel to customer and hire sites; some early starts / site-hours working. Breakdown-response element

may include on-call / out-of-hours cover (to be confirmed). Physical role: lifting, working outdoors, in confined welfare-unit plant spaces and all weathers. What they offer

Competitive salary (depending on experience). Company pension. Company van, tools and PPE. Manufacturer and in-house training across generators, power, heating and telemetry. Varied, hands-on work with a UK manufacturer that builds what you fix. If you feel that you have the relative skills/attributes to fulfil this role then please apply now for immediate consideration. The employer fully supports Equality in Employment. All employment is decided based on qualifications, merit and business need.

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