Mechanical Fitter - Register your interest

National Grid; Greater London; On-site; GBP 40,000 - 52,000; Full time

Job summary

National Grid is expanding its Mechanical Fitter teams and seeks experienced engineers to maintain, repair and overhaul equipment across high‑voltage substations. The role focuses on hands‑on maintenance, fault finding, and installation of new or refurbished gear, with a strong emphasis on safety and practical problem‑solving.

You’ll work in a team environment with industry‑leading training at the Eakring Training Centre, occasional stays away from home, and overtime opportunities.

Qualifications

• A recognised 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
• The ability to interpret engineering drawings and work to technical specifications
• 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 to base location

Responsibilities

• 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

Skills

Maintenance

Fault finding

Mechanical fitting

Reading drawings

UK driving licence

Safety awareness

Education

NVQ/Level 3 Mechanical Engineering

Apprenticeship in Mechanical Engineering

Job description

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

National Grid is making one of the biggest investments in the UK's electricity transmission network to support the country's future energy needs. As we expand and modernise our substations, we're growing our Mechanical Fitter teams and looking for skilled engineers who want to build a long-term career maintaining some of the UK's most critical infrastructure.

If you're an experienced Mechanical Fitter who enjoys hands-on engineering, fault finding and working on large equipment, we'd love to hear from you.

Why join National Grid?

As a Mechanical Fitter, you'll work on engineering equipment that few people ever get the opportunity to maintain. You'll become part of a highly skilled team where safety comes first, your development is invested in and your work has a real impact on millions of people every day.

Pay and Benefits

• Salary package of £40,197 pa including seasonal allowance
• London Salary package London Metropolitan £51,167 London Inner £52,267 pa including allowances
• Outer London Salary package North Kent, Rayleigh/Essex, Buntingford/Herts £45,137 pa including allowances
• Paid overtime + Annual performance 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

Role overview

This is a practical, hands‑on mechanically biased engineering role where you'll be responsible for maintaining, repairing and overhauling the equipment that keeps National Grid's Electricity Transmission Substations operating safely and efficiently.

• 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 plant including:

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

Whether you're rebuilding equipment, aligning components, working to precise tolerances or solving mechanical faults, every day brings new challenges and opportunities to develop your expertise. We'll provide industry-leading training at our Eakring Training Centre in Nottinghamshire alongside practical learning on site, helping you build specialist knowledge in high‑voltage mechanical engineering. Training may include occasional stays away from home, supported by generous overnight and mobility allowances. Some weekend working is required throughout the year, with paid overtime available.

Qualifications, Skills And Experience

• A recognised 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
• The ability to interpret engineering drawings and work to technical specifications
• 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 to base location

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're looking for 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.

Current Vacancies

• South Manchester x 2 – August
• Taunton, Devon x 1 - September
• Keadby, North Lincs x 2 – September
• Kirkby, Liverpool x 1 – September
• Basingstoke x 2 – September
• Buntingford, Herts x 1 - September
• More locations TBC – North East, North West, Midlands, London, South East, South West