About Sigma Power Services:
Sigma Power Services Pty Ltd is a Western Australian-based electrical services provider and part of the Tasmea group, specialising in the testing and commissioning of high-voltage electrical assets. Our core expertise includes protection, control, and automation systems across transmission, distribution, and industrial networks.

Partnering with major utilities, infrastructure operators, and private clients across Australia, we deliver technically sound, safe, and reliable solutions. Due to continued growth, we are seeking a motivated HV Technician to join our dynamic team and support a variety of exciting projects across the region.

Role Overview:
This is a hands-on position focused on high voltage maintenance, testing and commissioning, working under the supervision and direction of an Electrical Engineer. The ideal candidate will possess a solid technical foundation, a safety-first mindset, and a willingness to contribute to both field and project-based tasks. This role will involve site-based travel.

Key Responsibilities

- Undertake HV maintenance, testing and commissioning under the direction of the Electrical Engineer

- Test protection relays including Sepam, VAMP, Siemens, SEL, GE Multilin, ABB, Reyrolle and GEC electromechanical relays

- Test protection systems, generator protection, transformers and cables

- Apply differential and distance protection scheme understanding, including testing

- Operate HV test equipment and software, including Omicron and DIGSI

- Carry out HV testing of transformers, motors, circuit breakers and cables

- Perform substation maintenance

- Assist in preparing Technical Test Plans,



ITPs and punch lists, and prepare detailed technical reports on completion of works

- Contribute to estimating time, materials and costs for testing and commissioning scopes of work

- Inspect completed works and test results against design specifications and regulatory requirements, escalating any non-conformance to the Electrical Engineer

- Assist the Electrical Engineering team in evaluating new test methods, equipment and diagnostic techniques as they're introduced to site

- Comply with HSE policies and maintain high safety standards on all sites

Skills & Experience

- Experience with HV maintenance, testing and commissioning

- Sound knowledge of protection relays and power system protection principles

- Experience using HV test equipment and software (e.g. Omicron, DIGSI)

Requirements

- Relevant AQF Associate Degree, Advanced Diploma or Diploma (or equivalent), with a minimum of two years' relevant experience — or at least three years of highly relevant experience in lieu of formal qualifications

- Valid WA Driver's Licence (or ability to obtain)

- White Card and applicable site tickets (or willingness to obtain)

- Willingness to travel for site-based work as required

Desirable Skills

- Ability to complete arc flash modelling and assessment, update HV single line diagrams, and prepare HV submissions as an Electrical Protection Engineer

- Previous experience working with utilities or power system operators

Exposure to diverse and technically challenging projects across Australia.

How to Apply

To apply, please submit your CV and a brief cover letter outlining your experience.

📌 High Voltage Technician (Perth)
🏢 Sigma Power Services
📍 Perth