TP141 Commissioning Engineer – Substations (Contract)

About the role

We are seeking a TP141‑qualified Commissioning Engineer to join a specialist high‑voltage engineering contractor on two major National Grid transmission projects in East Anglia and Oxfordshire. The contract runs for approximately two years, is outside IR35 and offers a competitive day rate.

Key responsibilities

• Carry out commissioning activities on HV transmission substations up to 400 kV.
• Execute primary plant, protection and control commissioning in line with National Grid TP141 procedures.
• Perform functional testing, interlocking checks and support energisation of assets.
• Prepare and maintain commissioning documentation, test records and hand‑over packs.
• Collaborate with project managers, clients and site teams to ensure safe and efficient programme delivery.
• Travel to project sites in East Anglia or Oxfordshire as required.

Required profile

• Current National Grid TP141 commissioning engineer authorisation.
• Proven experience commissioning HV substations within the transmission sector.
• Strong knowledge of National Grid commissioning procedures and safety rules.
• Full UK driving licence and willingness to travel.

Required skills

• HV transmission substation commissioning (up to 400 kV).
• TP141 procedural compliance.
• Functional testing and interlocking verification.
• Energisation support.
• Commissioning documentation and hand‑over preparation.

What we offer

• Competitive day rate.
• Long‑term (≈2 years) contract on high‑profile National Grid projects.
• Opportunity to work on 132 kV, 275 kV and 400 kV assets.
• Travel to sites in East Anglia and Oxfordshire.