About the Role
This is a hands-on, field-focused leadership role with regular site presence.
Reporting to the Service Manager, you will lead LV/MV installation, testing and commissioning activity across WA, provide technical oversight to our existing WA-based electricians and apprentices, and represent Mayfield Industries to clients as the team continues to grow.
Because this role sits within our established WA operation, you'll have the support of the Service Manager and existing systems and processes on the ground, while still carrying genuine technical authority and accountability across your projects.
Success looks like: consistent, high-quality LV/MV installation and testing delivery, strong client relationships across WA's mining, utility and industrial base, and a technical standard that lifts the wider team.
Duties
Plan and perform LV/MV testing and commissioning using equipment such as Omicron (CMC/CPC series) — including protection relay testing, primary/secondary injection and circuit breaker timing analysis
Lead safety, quality and compliance across service and project activities
Supervise installation and commissioning activities on projects, and provide advanced fault-finding and technical support across LV/MV systems, switchboards, generators and UPS
Coordinate maintenance, breakdown response, commissioning and fault rectification works
Ensure compliance with WA Electrical Licensing Regulations, AS/NZS **** and testing requirements
Review and approve statutory and compliance documentation (including Prelim Notices, NOCs and ESCs) as required under WA regulations
Fulfil Electrical Supervisor responsibilities, including holding (or working towards) a WA Section 26 appointment




Provide technical supervision and quality oversight of testing and commissioning work performed by our WA-based electricians and apprentices, lifting method and rigor across the team
Build and maintain direct client relationships across WA's mining, utility and industrial sectors
Contribute to the ongoing development of service systems and processes that support the wider WA operation
Skills & Experience
Current WA Electrical License (A-Grade)
Existing WA Section 26 appointment as Electrical Supervisor, or willingness to obtain with support
Current CPR and Low Voltage Rescue (LVR) certification
Hands-on experience operating Omicron test equipment for LV/MV protection, commissioning or insulation testing
Strong experience in service, maintenance, testing or commissioning
Sound knowledge of Australian Standards (AS/NZS ****) and WA regulatory requirements
Experience in mining, utility or critical-infrastructure service environments
Exposure to transportable / designed-to-order switch rooms and substations
Demonstrated experience supervising licensed and unlicensed workers
Comfortable balancing technical accountability with day-to-day supervision, and confident representing the business directly to clients
A Construction Induction Card (White Card) and current C-Class driver's license will be required before you start — if you don't hold these yet, we're happy to help you organize them as part of the process.




Benefits
Market-competitive salary based on experience and competencies
Permanent full-time role with a financially strong, ASX-listed employer
Supportive team culture with genuine investment in safety and professional growth
Henderson, WA location — no FIFO required; stable, local role
About us
At Mayfield, we are proudly Australian owned & operated since ****and pride ourselves on adding value through innovation and collaboration.
This approach, combined with our commitment to our people and partners, allows us to be leaders in the design and manufacture of one of a kind and modular switchboard, control systems and transportable substation solutions to meet safety and reliability demands of critical electrical infrastructure across the nation.
Our service team provides workshop-based and in-field installation, maintenance, testing and commissioning support for low and medium voltage switchgear and control systems, including transportable designed-to-order switch rooms and substations.
We support a diverse client base across Australia, including mining and utility providers who demand high standards of professionalism, technical capability and reliability.
We're seeking an Electrical Installation, Test & Commissioning Supervisor to support the continued growth of our established WA service and project business, leading hands-on LV/MV installation, testing and commissioning activity across our WA operations.
Want more info?
see our profile at /
How to Apply
Click APPLY to submit your resume and a brief cover letter.
Mayfield Group Holding is an equal opportunity employer.
We welcome applications from candidates of all backgrounds.

📌 Electrical Installation, Test & Commissioning Supervisor (Western Australia)
🏢 Mayfield Services
📍 Western Australia