Field Service Engineer

This is a new and exciting opportunity for an experienced Field Service Engineer specializing in the warranty and aftersales of distribution & power transformers to help support the continued growth of a well-established business in Leeds.

What’s the job:

Reporting to the Head of Site Services, this role provides urgent warranty and aftersales support for distribution & power transformers across the UK and Europe. This includes responding at short notice to client faults, oil leaks, operational issues and emergency requests, as well as carrying out fault investigation, rectification works and preparing detailed technical reports. The role will also involve some lone working and will require flexibility to support other Site Services tasks when not attending call‑outs.

Key Responsibilities:

Respond to warranty and aftersales issues on distribution and power transformers at short notice. - Carry out detailed investigation and diagnosis of transformer faults, oil leaks and operational issues.

Perform rectification works such as gasket replacement, sealing of flanged joints, bushing checks, accessory replacement and mechanical adjustments.

Complete all paperwork including job sheets, fault reports, RAMS, photographs and service documentation.

Communicate findings and updates effectively to internal teams, customers and supervisors.

Travel frequently across the UK and Europe for site‑based reactive work.

Work independently on sites when required in accordance with lone‑working procedures.

When not attending call‑outs, support wider Site Services tasks including SOP preparation, audits, shop‑floor work and planned site jobs.

Assist with general duties related to distribution and power transformers.

Carry out quality checks, health & safety audits and site inspections as required.

To follow all reasonable requests by Management and Supervisors, to include duties not specified in this job description.

Warranty & Aftersales Mechanical Tasks

Identifying and locating transformer oil leaks

Replacing gaskets, seals, O‑rings and breathers linked to leak rectification

Resealing and torque‑checking all flanged joints to prevent recurrence of leaks

Replacing or refitting radiators, conservators and cooling system components

Inspecting and refitting bushings (HV and LV) where leak or fault conditions exist

Removing, repairing and reinstalling marshalling boxes as part of fault rectification

Installing and replacing fans, pumps and cooling system accessories as part of urgent repairs

Mechanical adjustments, bracket repairs and tightening/realigning components following faults

Torque checking of mechanical fasteners to specification after repairs or inspections

Warranty & Aftersales Electrical Tasks

Belling out and fault‑checking wiring within marshalling boxes and terminal blocks

Inspecting, installing or replacing control devices (OTI, WTI, PRD, MOG, relays)

Performing electrical isolation, continuity checks and component identification during fault finding

Carrying out IR (Megger) testing and HV Withstand (VLF) testing during investigations

Conducting functional checks on alarms, trips and relays to identify cause of failure

Ensuring grounding and bonding of all metallic components following repairs

Testing Support (as required)

IR (Insulation Resistance) testing using a Megger

HV Withstand test operations

Conduct functional testing checks of:

Buchholz relay

PRD

MOG

Air bag relay

Oil surge relay

Fans and cooling system controls

Gathering testing evidence for use in fault reports

Fault Investigation & Reporting

Conducting detailed on‑site fault finding on distribution and power transformers

Inspecting physical condition, wiring, accessories and oil system components

Capturing photographic evidence, measurements, readings and witness information

Completing accurate, timely fault reports documenting findings and recommended actions

Contributing to root‑cause analysis and warranty case documentation

Communicating investigation outcomes clearly to internal teams and clients

Maintenance & Refurbishment

Draining and refilling transformer oil as part of leak rectification or repair

Replacing gaskets, seals, silica gel breathers and monitoring devices

Cleaning, inspecting and preparing internal/external components following faults

Replacing or upgrading accessories (e.g., OTI/WTI, relays, pressure devices)

Collecting oil samples for dissolved gas analysis (DGA)

Re‑torquing and recommissioning transformers after service work

Site Readiness & Safety

Setting up safe work zones and barriers prior to repairs or investigations

Using lifting and rigging equipment safely during disassembly or component removal

Maintaining a clean, controlled and organised work area

Adhering to site-specific RAMS (Risk Assessments and Method Statements)

Following lone‑working rules and dynamic risk assessments where needed

Reporting hazards, faults or near‑misses to supervisors

Ensuring safe handling and storage of oil, tools and testing equipment

Skills, Knowledge & Experience: 

Experience and competence of working on site fitting distribution and power transformers and associated packages is essential

Hands on experience of working within a mechanical/electrical engineering environment is essential

The ability to understand mechanical and schematic drawings is essential

Apprentice trained or a Mechanical/Electrical qualification is essential

Experience of Health & Safety and conducting risk assessments is essential

ECS accreditation is essential

Full UK driving licence is essential

Transformer full testing experience is desirable

You will have good written and verbal communication skills, with the ability to liaise with customers and resolve issues in a proactive and positive manner

Strong trouble shooting skills

Excellent attention to detail

You will be flexible and adaptable and be prepared to attend site at short notice which may be outside your normal working hours

Experience of working collaboratively with other operations personnel with the ability to train and enhance your work colleagues’ skills.

Ideally experience of working within a continuous improvement environment

Ideally have up to date training on Overhead Crane/Slinging Lifting certification

Ideally have a FLT licence

Ideally IPAF certification

Salary and benefits:

Salary negotiable dependant on experience

37.5 hours per week

33 days (including bank holidays)

Profit share scheme

Healthcare cash plan and Employee Assistance Programme

Electric Vehicle/Bike to work salary sacrifice scheme

Pension

Life Insurance x 3