Oil mechanic Jobs

Fortel Services Ltd

Location:
United Kingdom, Various Transmission & Substation Sites Across the UK

Category:
Energy

Contract Type:
Employment contract

Salary:

Not provided

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Job Description:

We are seeking a skilled and experienced Oil Mechanic specializing in the maintenance, servicing, and repair of high-voltage (HV) and extra-high-voltage (EHV) transformers, circuit breakers, and oil-insulated equipment up to 400kV. The ideal candidate will have a strong background in handling oil filtration, oil replacement, testing, and fault diagnosis to ensure the reliability and efficiency of electrical transmission systems.

Job Responsibility:

Conduct oil filtration, degassing, and dehydration of transformers and switchgear up to 400kV
Perform oil sampling and analysis to assess dielectric strength, moisture content, and contamination levels
Drain, refill, and circulate insulating oils to maintain optimal equipment performance
Replace and maintain bushings, gaskets, seals, and radiators on oil-filled transformers
Conduct DGA (Dissolved Gas Analysis) and interpret oil test results to detect potential transformer faults
Perform pressure testing, insulation resistance testing, and breakdown voltage tests on oil-filled equipment
Identify leaks, overheating issues, and insulation breakdowns, implementing corrective measures
Maintain detailed inspection reports and test records for compliance and future reference
Assist in the installation, commissioning, and retrofitting of oil-filled power transformers and reactors
Carry out preventative maintenance and emergency repairs on oil-insulated circuit breakers, tap changers, and bushing assemblies
Ensure flushing and refilling of transformer oil during major maintenance or refurbishment activities
Support the vacuum filling process to remove moisture and ensure proper insulation levels
Adhere to National Grid, DNO, and manufacturer standards for oil handling and maintenance
Ensure compliance with HSE regulations, COSHH, and environmental standards for oil disposal and handling
Conduct risk assessments and method statements (RAMS) before performing maintenance activities
Follow lockout-tagout (LOTO) procedures and high-voltage safety protocols to prevent electrical hazards
Work closely with substation engineers, electrical technicians, and HV specialists to ensure efficient maintenance operations
Maintain accurate logs, inspection reports, and oil quality documentation for regulatory compliance
Train and mentor junior oil mechanics and apprentices in best practices

Requirements:

CSCS or EUSR (Energy & Utility Skills Register) Card
Oil Handling & Filtration Certification
Experience working with transformers, switchgear, and oil-filled equipment up to 400kV
Knowledge of insulating oil properties, contamination risks, and filtration techniques
Strong understanding of electrical safety procedures and high-voltage maintenance practices
Proficiency in using oil testing equipment (DGA, dielectric strength tester, moisture analyzers, etc.)

Nice to have:

National Grid Competent Person (NG Persons) Certification
Confined Space Training
Manual Handling & Fire Safety Certification
First Aid at Work Certification
Experience with SF6 Gas Handling & Testing

Additional Information:

Job Posted:
December 08, 2025

Employment Type:

Fulltime

Work Type:

On-site work

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