Site Supervisor - HV Substations

National Grid; Cardiff; On-site; GBP 50,000 - 57,000; Full time

Job summary

National Grid is seeking a Site Supervisor for HV Substations, ensuring safety and quality across construction projects in South West England. The role includes managing site activities, championing compliance with CDM regulations, and supporting teams in delivering impactful energy projects. A competitive salary and excellent benefits package are offered.

Benefits

Company Vehicle

Paid Travel

26 days annual leave plus 8 statutory days

Generous contributory pension scheme

Access to flexible benefits

Family care benefits

Qualifications

• Experience in the Utilities industry construction.
• Understanding of CDM regulations and quality management systems.
• Full UK driving licence required.

Responsibilities

• Oversee construction projects ranging from £100k to £10m.
• Conduct regular safety audits and manage site-based activities.
• Support site teams to ensure compliance with safety standards.

Skills

Safety Management

Quality Control

Project Management

Stakeholder Management

Education

Level 3 NVQ / ONC Electrical or Mechanical qualification

Tools

CDM regulations

Job description

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Partnering operational teams for success

How do you ensure high levels of safety and quality across various sites?

This is more than just a job—it’s your opportunity to shape the future of the UK’s electricity network. In this key role, you’ll help expand and strengthen the grid to connect and transport more renewable and low-carbon energy to homes and businesses. Keeping the lights on and society moving.

As a National Grid Representative, you’ll oversee a range of construction-based projects (£100k - £10m) such as HV transformer and shunt reactor installations to cable replacements, cyber security upgrades, and protection and control system replacements across the South West region – Cardiff – Bristol – Bath – Swindon. With a company vehicle, paid travel, and a strong work-life balance culture, you’ll have the support you need to thrive.

Your expertise will ensure that site-based construction activities—whether delivered by our principal contractors or National Grid’s internal teams—are managed safely, efficiently, and to the highest standards. You’ll champion safety and quality, support site teams in meeting CDM regulations, help with plant and equipment procurement, conduct regular safety audits, and lead coordination meetings during project delivery. You’ll also contribute to scheme development by completing site visit reports and facilitating site visits with designers.

If you’re passionate about driving impactful projects and being part of a team that’s shaping the UK’s energy future, we’d love to hear from you.

Must have:

• Minimum Level 3 NVQ / ONC Electrical or Mechanical qualification.
• A proven track record in the Utilities (or comparable) industry construction.
• Can demonstrate a good understanding of CDM regs and quality management systems as supervisor under NEC and/or self-delivered works.
• Experience of Safety, Health, Environmental, Quality.
• An awareness of Project, Contract and Stakeholder management.
• Full UK driving licence.
  
  
  

Desirable

• SSSTS or SMSTS qualification.
• Principal Contractor Representative (PC) / Site Manager & Temporary Works Co-ordinator under National Grid’s Procedures.
• NEBOSH / IOSH.
  
  
  

Pay And Benefits

• A competitive salary up to £57,000 pa + Company Vehicle + Paid Travel
• Paid overtime and Bonus.
• 37 Hours Monday – Friday.
• 26 days annual leave plus 8 statutory days.
• The option to buy additional or sell holiday days.
• Generous contributory pension scheme - we will double-match your contribution to a maximum company contribution of 12%. Overall 18%.
• Financial support to help cover the cost of professional membership subscriptions, course fees, books, exam fees and time off for study leave – relevant to your role.
• Access to flexible benefits such as a share incentive plan, salary sacrifice car and technology schemes, support via employee assistance lines and matched charity giving to name a few.
• Family care benefits including a back-up care service for when your usual care arrangements fall through (six paid days each year as standard with the option to purchase further days).
• Access to apps which support health, fitness and wellbeing.
  
  
  

Apply now for immediate consideration.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Utilities

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