Substation Mechanical Fitter – High-Voltage Maintenance Pro

National Grid plc; Wickford; On-site; GBP 42,000 - 52,000; Full time

Benefits offered by this job

Company vehicle from home to work

Bonus up to 4% (2026)

Overtime pay

26 days holiday + 8 statutory days

Pension up to 18%

Paid overtime + weekend work

Job summary

National Grid plc is seeking a mechanically biased engineer to maintain, repair and overhaul equipment across high‑voltage substations. The role is outdoor, site‑based and involves working at height, with training provided at our Nottinghamshire centre and occasional away‑from‑home stays.

You will undertake stripping, inspection and rebuilding of components, diagnose faults, install refurbishments and support planned maintenance with overtime and a company vehicle from home to work.

Qualifications

• Recognised mechanical apprenticeship or NVQ/Level 3 in Mechanical Engineering with fitting experience.
• Strong mechanical maintenance, overhaul or installation experience.
• Experience stripping, rebuilding and repairing plant and equipment.
• Confidence using hand tools, power tools, precision measuring equipment and torque tools.
• Proactive fault finding and problem solving.
• Commitment to safe working practices and ability to work at height.

Responsibilities

• Stripping, inspecting and rebuilding mechanical components.
• Diagnosing faults and carrying out repairs.
• Replacing worn and ageing components including bearings, seals and moving parts.
• Installing new or refurbished equipment.
• Supporting planned maintenance and emergency breakdown response.
• Performing routine inspections and condition monitoring.

Skills

Mechanical apprenticeship

Level 3 Mechanical

Maintenance experience

Hand tools

Problem solving

Safety at height

Driving licence

IT/computer literacy

Education

Mechanical apprenticeship

NVQ/Level 3 Mechanical Engineering

Job description

National Grid plc is seeking a mechanically biased engineer to maintain, repair and overhaul equipment across high‑voltage substations. The role is outdoor, site‑based and involves working at height, with training provided at our Nottinghamshire centre and occasional away‑from‑home stays.

You will undertake stripping, inspection and rebuilding of components, diagnose faults, install refurbishments and support planned maintenance with overtime and a company vehicle from home to work.