Mechanical Fitter - St Johns Wood, London

Business Unit:  Electricity Transmission

Requisition Number:  10080

Keep Britain's electricity network moving — and help power the future.

National Grid is investing heavily in the UK's electricity transmission network, expanding and modernising substations to meet future energy needs. We're growing our Mechanical Fitter teams and looking for skilled engineers ready to build a long-term career maintaining some of the country's most critical infrastructure.

• Salary package £52,267 pa including allowances
• Paid overtime + Annual bonus opportunity of up to 4% (2025)
• Pension contributions up to 6% employee – 12% Company - totalling 18%
• Company vehicle for home-to-work travel
• 26 days' annual leave plus 8 statutory days
• A 37-hour average working week, Monday to Friday, with a 4-day working pattern (36 hours in winter and 38 hours in summer)
• Industry-leading technical training and long-term career development
• Click the link to review more benefits with National Grid - Benefits | National Grid Careers

Role overview

This hands-on, mechanically biased engineering role involves maintaining, repairing and overhauling the equipment that keeps National Grid's Electricity Transmission substations operating safely and efficiently.

Working predominantly outdoors, you'll carry out a wide range of maintenance activities including:

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

You'll work on specialist equipment including:

• Circuit breakers
• Power transformers
• High-speed on-load tap changers
• Air compressor systems
• Cable systems
• Ancillary equipment across high-voltage substations.

Every day brings new challenges, from rebuilding equipment and aligning components to solving mechanical faults. We'll provide industry-leading training at our Eakring Training Centre in Nottinghamshire, alongside practical site learning, to help you build specialist high-voltage mechanical engineering expertise. Training may include occasional stays away from home, supported by overnight and mobility allowances. Some weekend working is required, with paid overtime available.

Qualifications, Skills and Experience

We're keen to hear from candidates with:

• A recognised Level 2 or Level 3 apprenticeship in Mechanical engineering, or an NVQ/Level 3 Mechanical engineering qualification with relevant fitting experience
• Strong mechanical maintenance, overhaul or installation experience
• Experience stripping, rebuilding and repairing industrial electrical equipment
• Confidence using hand tools, power tools, precision measuring equipment and torque tools
• A proactive approach to fault finding and problem solving
• A strong commitment to safe working practices
• A full UK driving licence
• Confidence using a computer and iPad
• You live within approximately 30 minutes travel of Wimbledon or Croydon

It would be great if you also have:

• Experience working on high-voltage equipment
• Previous experience within power generation, utilities, manufacturing, heavy engineering or process industries
• NEBOSH or IOSH qualifications

Please note that visa sponsorship and relocation packages are not available for this role.

Build a career that powers the UK

If you want a role where your skills are valued, your development is supported and your work makes a genuine difference, we'd love to hear from you.

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