Australian owned and operated
Award-Winning Electrical Infrastructure Provider
Underground and overhead electrical construction, civil engineering, and contestable works for energy network infrastructure.
Installation, repair and maintenance of overhead and underground service lines connecting properties to the electricity network.
Medium and high voltage electrical design for systems up to 132kV across all NSW energy providers.
Licensed & Accredited Commercial Electrical Contractor
Wilken Group holds a NSW Electrical Contractor Licence and maintains full regulatory compliance across all commercial and industrial electrical work in New South Wales.
Our accreditations span all three levels of the Accredited Service Provider (ASP) scheme — the professional certification framework that governs contestable electrical works in NSW. As a Grade ‘A’ Level 1 ASP, we deliver underground and overhead electrical construction. Our Level 2 accreditation covers the installation and repair of service lines connecting properties to the electricity network. At Level 3, our engineering team holds design certification for medium and high voltage systems up to 132kV across all NSW energy providers.
Wilken also maintains three internationally recognised ISO certifications: ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and ISO 45001:2018 (Occupational Health & Safety). These management system certifications are independently audited and demonstrate our commitment to meeting the highest technical standards in commercial electrical contracting.
Our workforce includes 35+ qualified Level 1 electricians, each holding the trade qualifications, licensing and specialist training required to work on high voltage infrastructure. We invest in ongoing skills development, supporting apprenticeship pathways and continuous professional development courses to ensure our team stays current with evolving Australian Standards and industry best practice.
Our Electrical Infrastructure Capabilities
Wilken delivers the full scope of commercial electrical infrastructure across Sydney and NSW — from high voltage substation design and construction through to underground cable networks, overhead power lines, and streetscape installations. As an ASP Level 1, 2 and 3 accredited contractor, we handle every stage in-house: design, civil works, electrical construction, testing, and energisation.
Substations & High Voltage
Design and construction of padmount and kiosk substations for commercial, industrial and residential distribution networks.
Zone, chamber and surface chamber substation construction including transmission lines, earthing and high voltage cabling.
Full substation design and construction services — from initial engineering through civil works, fit-out and commissioning.
Installation and maintenance of ring main units for medium voltage distribution switching and protection.
SMU installation and integration within high voltage switchboard and distribution infrastructure.
Supply, installation and maintenance of high voltage switchgear, circuit breakers, disconnectors and protection systems.
Design and installation of copper earthing grid systems for substations, commercial buildings and critical infrastructure.
Overhead Infrastructure
Overhead power line installation including pole erection, transmission tower construction and luminaire erection.
Specialist conductor stringing and tensioning for overhead transmission and distribution networks.
Private power pole installation, replacement and upgrade services for residential and commercial properties.
Streetscape electrical works including traffic lights, signal installation, parks and landscape lighting.
Underground Infrastructure
Underground cable installation including duct laying, pillar installation, cable laying and jointing.
Cable trench excavation, construction and backfill for underground electrical and communications infrastructure.
High and low voltage cable jointing including live pot end seals, T-jointing, paper-lead jointing and cable testing.
Construction of cable pits and access chambers for underground power networks and maintenance access.
Hydro excavation and vacuum excavation for safe excavation around underground utilities and cables.
Electrical Supply & Connections
Consumer mains installation, upgrade and replacement — connecting properties to the main power supply network.
Installation and removal of whole current metering equipment in accordance with distributor standards.
Disconnection, reconnection and temporary supply services for renovations, demolitions and new connections.
Installation and maintenance of the point of attachment where overhead service lines connect to properties.
Assessment and management of the point of supply — the boundary between the distribution network and private electrical installation.
Engineering assessment and compliance management at the point of common coupling for embedded generation and large loads.
Internationally recognised certifications
Electrical Safety Testing & Compliance
Every Wilken project is delivered under our ISO 45001-certified safety management system, with comprehensive risk management procedures that exceed minimum regulatory requirements. Our safety record reflects four decades of disciplined practice across high-risk electrical environments, from live high voltage substations to active construction sites.
Our in-house team conducts all electrical safety testing, inspection and verification work as part of every project. This includes RCD testing, thermal imaging, cable fault detection, earth testing, and fire safety compliance checks on electrical installations. All testing equipment is calibrated and maintained to Australian Standards, and every inspection is documented with full test reports for our clients’ compliance records.
Wilken’s approach to reliability engineering means we design and build electrical systems for long-term performance, not just initial commissioning. Our planned maintenance programs include scheduled inspections, predictive testing, and condition monitoring to identify potential issues before they cause downtime or safety incidents. For critical infrastructure — hospitals, data centres, transport networks — this proactive approach to equipment reliability is essential.
Wilken has a certified integrated management system consisting of:
Great team to work with!
Wilken’s diligence and proactive approach through the project is what ensured the critical HV feeder installation went as smoothly as it did. You have been a great team to work with and look forward to working with yourselves again.
Neil Donald
Associate Director – Area 3
Trusted Electrical Contractor for Commercial & Industrial Projects
Wilken operates as a principal electrical contractor — not a general contractor or labour hire firm. We employ all of our approximately 90 commercial electricians, engineers, project managers and support staff directly. No subcontractors. This single-source accountability model means one contract, one point of contact, and complete control over quality, safety and scheduling from start to finish.
Our clients include property developers, facility managers, government agencies, and some of Australia’s most recognised commercial property owners. We’ve delivered over 2,000 projects across sectors including retail (Westfield, Woolworths, Officeworks), health (Westmead Children’s Hospital), education (UNSW, UTS), transport (WestConnex), defence (Royal Australian Air Force), and major commercial developments (City of Sydney, Stockland, BMW).
Wilken carries comprehensive public liability and professional indemnity insurance appropriate to the scale and risk profile of our projects. Our overhead structure supports full turnkey project delivery — from initial application for supply through engineering design, procurement, construction, testing and final energisation — reducing the complexity, cost and risk of engaging multiple contractors.
For ongoing facility management requirements, Wilken provides scheduled electrical maintenance contracts covering planned inspections, reactive repairs, emergency call-outs, and compliance auditing. Our 24/7 management availability ensures critical issues are addressed without delay.
Completed Projects
Delivering impactful electrical construction services
Over 2000 projects completed across Domestic, Commercial, Industrial, Government Institutions, Shopping Centers, Factories, Hospitals, Medical Institutions & Defence.
Adco Constructions
Established a new triple 1500kVA suburban chamber substation, relocated high-voltage feeders, and upgraded the local streetlighting.
FDC Constructions
Supply, install and commissioning critical high-voltage electrical infrastructure, including 33kV substations and transformers.
Mivac
Installation of two triple and one double chamber substations, decommissioning an existing substation and more.
Electrical Infrastructure for Modern Commercial Environments
Today’s commercial and industrial facilities demand electrical infrastructure that supports far more than lighting and power. Wilken designs and installs integrated electrical systems encompassing high voltage distribution, data cabling, communications networks, building automation, security systems, and specialist power supply solutions for sensitive environments.
Our electrical construction capabilities cover the full spectrum of commercial fit-out and base building requirements: switchboards and distribution boards, power and lighting circuits, dry fire detection systems, data and communications cabling, access control and security installations, and energy management systems. For facilities handling sensitive information — financial institutions, government departments, data centres — we implement electrical infrastructure that supports the physical security and information security requirements of the environment.
Wilken’s engineering and design team works with the latest computer-aided design tools to deliver electrical schematics, cable schedules, and commissioning documentation to Australian Standards. From high voltage transmission infrastructure and substation installation through to final circuit wiring and sensor integration, our in-house capability eliminates the coordination risk of multi-contractor delivery.
