Mechanical Fitter - Marston Vale

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

Benefits offered by this job

Company vehicle from home to work

Overtime + Bonus

26 days holiday

Pension Max 18%

Job summary

National Grid is seeking a mechanically biased fitter to maintain, repair and overhaul high-voltage substation equipment. You will work outdoors, often at height, and on a range of machinery including circuit breakers, transformers and air systems.

The role includes training at our facilities and occasional away-from-home trips with allowances. The ideal candidate has a recognised mechanical apprenticeship or NVQ Level 3, strong maintenance experience and a proactive fault-finding mindset.

Qualifications

• Recognised mechanical engineering apprenticeship or NVQ/Level 3 with fitting experience.
• Strong mechanical maintenance, overhaul or installation experience.
• Experience stripping, rebuilding and repairing plant and equipment.
• Proficiency with hand tools, power tools, measuring devices and torque tools.
• Proactive fault finding and problem solving approach.
• Commitment to safe working practices and ability to work at height.
• Full UK driving licence.
• Comfort using computer and iPad.

Responsibilities

• Maintain, repair and overhaul equipment in National Grid substations.
• Diagnose faults and carry out repairs to mechanical components.
• Replace worn components such as bearings, seals and fasteners.
• Install new or refurbished equipment and support planned maintenance.
• Participate in emergency breakdown responses and routine inspections.

Skills

Mechanical apprenticeship

NVQ Level 3

Mechanical maintenance

Overhaul/installation

Fault finding

Working at height

Driving licence

Computer/iPad use

Travel close to Marston Vale

Education

NVQ/Level 3 Mechanical Engineering

Tools

Hand tools

Power tools

Precision measuring equipment

Torque tools

Job description

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 Bedfordshire team and looking for a skilled engineer ready to build a long-term career maintaining some of the country's most critical infrastructure.

Pay and Benefits

• Salary package £47,213 pa including allowances.

• Paid overtime + Bonus (2026 - 4%), Company commercial vehicle from home to work.
• 26 days holiday plus 8 statutory days, Contribution Pension Max Total 18%.
• Hours - 37 Avg Monday to Friday, Days only (Winter 36 hrs / Summer 38 hrs - 4 day working pattern).
• For further benefits information please click the link - Benefits | National Grid Careers

Fitter 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 and sometime at height on a mobile platform, 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 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 plant and 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 and can work at height.
• A full UK driving licence.
• Confidence using a computer and iPad.
• You live within approximately 40 minutes travelto Marston Vale, MK45 2JJ.

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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