Job Title
Commissioning Engineer

Location
Various sites across the UK

Role Purpose
You will lead the commissioning of high voltage (HV) systems and equipment to ensure they are installed, tested, and compliant before energisation. This includes substations within Solar, Battery Storage, ICP, and DNO environments, covering voltages from 11kV to 132kV.

Key Responsibilities

• Site Preparation: Assess site readiness and suitability for commissioning.

• Planning & Documentation: Develop commissioning plans, inspection and test procedures (ITPs), and maintain records.

• Installation Supervision: Oversee installation work to confirm compliance with design and standards.

• Testing: Carry out testing across:

  • Switchgear, transformers, cables, battery chargers, signal panels

  • AC/DC, HV/LV electrical systems and SCADA

  • Activities including:

    • Functional checks

    • Ductor, insulation resistance, AC Hipot, VLF testing

    • Primary and secondary injection tests

    • CT analysis and fault finding (core/sheath to earth)

    • Transformer tests (winding resistance, ratio, dissipation factor, vector group, SFRA)

• Cable Work: Terminate, gland, and test multicore and signal cables.

• System Configuration: Set up protection relays and adjust logic to achieve design performance.

• Safety & Quality: Ensure all work meets safety regulations and quality standards.

• Troubleshooting: Identify and resolve commissioning issues.

• Customer & Stakeholder Liaison: Represent the company professionally and support client expectations.

• Training: Mentor junior engineers in systems and safe practices.

• Other Duties: Provide support as directed by management.

Person Specification

Education & Qualifications
Essential:

• HNC or Degree in Electrical Engineering

• ECS or EUSR card

• Full UK driving licence held for at least 12 months

• Competent Person status for Permits to Work

Desirable:

• City & Guilds 17th or 18th Edition Wiring Regulations

• Advanced Apprenticeship in Electrical Installation

• AP15 or OP40 certification

Experience & Skills

Essential:

• Commissioning and testing HV systems, including:

  • Switchgear functional checks and ductor testing

  • AC Hipot, VLF, and DC pressure tests

  • Injection testing on protection relays

  • CT ratio and knee point analysis

  • Transformer testing (insulation resistance, ratio, vector group, DGPT2/Buchholz checks, SFRA)

  • Fault finding on HV/LV cables

• Ability to interpret electrical drawings and specifications

• Proficient with equipment including:

  • Omicron CMC356, CT Analyser, CPC100, Franeo 600, Testrano

  • Sverker 650, HVA 68TD VLF, Megger MIT515, DLRO10HD, Digi Bridge, PFT-1003