WPS staff installing a power transformer

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Site Aftersales & Warranty Engineer

Site Aftersales & Warranty Engineer

The role

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.

To apply, please email your current CV along with a cover letter to careers@wilsonpowersolutions.co.uk. All applicants must be able to demonstrate their right to work in the UK. No agencies.

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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
Supporting 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)

Assisting with IR (Insulation Resistance) testing using a Megger
Assisting with HV Withstand test operations
Assisting with functional checks of: Buchholz relay, PRD, MOG, air bag relay, oil surge relay, fans & 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