The Role

We are seeking an experienced HV Commissioning Engineer with current or previous National Grid authorisation to support the commissioning of high-voltage infrastructure projects across Southern England and North London.

This is a field-based role working on live and pre-energisation environments, playing a critical part in ensuring HV assets are commissioned safely, compliantly, and in line with National Grid and UK Grid Code requirements.

Key Responsibilities

• Carry out commissioning activities on HV plant and systems in accordance with National Grid procedures and safety rules
• Act under relevant National Grid authorisations (e.g. SAP, AP, CP depending on scope)
• Commission HV equipment including:
• Switchgear, transformers, protection systems
• Primary plant and associated secondary systems
• Execute and sign off commissioning test documentation, switching schedules, and safety paperwork
• Interface directly with National Grid, DNOs, ICPs, and project teams
• Support outage planning, energisation, and return-to-service activities
• Identify and resolve commissioning issues on site, ensuring minimal disruption and maximum safety
• Maintain full compliance with UK safety standards, site rules, and permit systems

About You

• Proven experience as an HV Commissioning Engineer within the UK power sector
• National Grid authorised (current or lapsed with recent experience)
• Strong experience working on UK transmission or distribution networks
• Comfortable working across live substations and operational environments
• Excellent understanding of HV safety rules, switching, and commissioning procedures
• Flexible and willing to travel across Southern England / North London

Essential

• National Grid authorisation(s) relevant to the role
• Experience commissioning HV assets in the UK
• Full UK driving licence
• Right to work in the UK

Desirable

• Experience up to 132kV / 275kV / 400kV
• SAP or Senior Authorised Person status
• Background with National Grid, DNOs, ICPs, or major EPC contractors

What’s On Offer

• Long-term HV commissioning work on critical UK infrastructure
• Competitive day rate or salary (depending on engagement type)
• Consistent project pipeline across Southern England
• Opportunity to work on National Grid–regulated assets