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Oil mechanic

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Fortel Services Ltd

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

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Category:
Energy

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Contract Type:
Employment contract

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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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