Our Business

and History

NJ Construction is known for getting projects delivered regardless of complexity, by applying innovative design and construction solutions and a motivated workforce with a can do approach.

We provide design and engineering, construction and maintenance services to the electrical and communications industry, using established systems management and a focused team working to enhance our reputation.

NJ Construction self performs the majority of works undertaken and has the capable workforce and modern plant and equipment to ensure efficient and safe performance.

The markets we operate in include the Utility, Rail, Road, Mining, Renewable Energy and Telecommunications sectors, assisting our customers to design, construct and maintain critical infrastructure.

NJ Construction services include:

    • Engineering and Design of Electrical Reticulation
    • Transmission Construction and Refurbishment up to 500kV
    • Overhead and Underground Distribution Construction
    • Substation Design and Construction
    • Renewable Energy Infrastructure
    • Communications Infrastructure.

A proven and qualified team of engineers, project managers, tradesman, administrators and planners support the successful delivery of projects.

NJ Construction seeks to achieve long lasting relationships with our clients through an honest and open approach to contracting. This is echoed in our values of safety, teamwork, honest and open communication, integrity and outstanding customer service. These essentials are applied at all levels throughout the business and form our core focus. It is the people at NJ Construction that ensure our success. The teams in corporate, major projects, human resources, administration and at our depots throughout NSW and QLD work together to deliver both customer and business objectives.  These individuals have fierce loyalty and pride in where this business has come from and our collective achievements.

In 20+ years NJ Construction has grown be the largest Level 1 service provider in NSW and has established offices in Queanbeyan, Dubbo, Port Macquarie, Alstonville and Newcastle. NJ Construction also has an office in Brisbane (Queensland), Suva (Fiji) and Hamilton (New Zealand).

In June 2016, NJ Construction was bought by Quanta Services Inc, a US Fortune 500 company with estimated revenues of US$7.7B in 2016. Quanta, like NJ Construction, are specialists in what they do. In the US they are the leading specialized contracting services company, delivering infrastructure solutions for the electric power and oil and gas industries. With operations throughout the United States, Canada and Australia and in select other international markets, NJ Construction will continue to grow stronger under Quanta with access to financial backing, experience and synergies with other companies in the Quanta family. In Australia, Quanta Services has six businesses. For more information visit www.quantaservices.com/international/Australia



  • 1994

    NJ Construction founded April 1994
  • 1995

    NJ Construction establish Construction Depot in Phillip, Canberra
  • 1996

    Commenced Contestable Electrical Network Connections in NSW
  • 1997

    Strathfield 132kV Transmission Tower Refurbishment – Energy Australia
  • 1998

    Achieved 3rd Party Quality Management System Certification (ISO9001)
  • 1999

    Kurnell 132kV Transmission Tower Refurbishment – Energy Australia
  • 2000

    NJ Construction relocate Construction Depot to Queanbeyan , NSW Australian Defence High Frequency Modernisation Project, High Voltage Supply and 66kV Substation - Thiess
  • 2001

    Residential Connections performing underground and aerial infrastructure installation in the ACT – TransACT Capital Communications
  • 2002

    Queensland Awoonga Dam 40km 66kV Transmission Line Relocations – Ergon Energy Captains Flat Weather Radar Underground Feeder – Bureau of Meteorology NJC Achieve OHS Third Party Certification (AS4801)
  • 2003

    Northern Territory, Berrimah to Hudson Creek 132kV Cyclone rated transmission line – PowerWater
  • 2004

    Moree to Bellata 66kV Transmission Line – Country Energy Canberra Residential Connections – TransAct Capital Communications Temora to Lake Cowal Transmission Stringing – Electrix Narrabri 132kV Line Entries – Country Energy
  • 2005

    Victoria, Horsham 25km 66kV transmission line – Powercor NJC Establish Construction Depot in Alstonville (NSW Northern Coast) Iluka Resources 25kms 66kV Transmission Line – Powercor Murrarie 110kV Transmission Line Stringing – Energex Molong to Manildra 66kV Feeder Dismantling – Country Energy Re-conductoring of 132kV Feeder Sydney – Energy Australia Awarded Integral Energy Transmission Tower Refurbishment – 200 Towers
  • 2006

    Australian Defence Headquarters Bungendore High Voltage Supply and Substations and Access Road Street-lighting Papua New Guinea OKTedi Mine Transmission Tower Rebuild NSW Bayswater Power Station Fibre Optic Network (overhead and underground) Western Australia, Emu Downs 132kV Transmission Line for Windfarm connection – Western Power Maintenance contract for the South West Interconnection System for Western Power Dapto 330kV Transmission Tower Refurbishment – Transgrid Communications Tower Refurbishment – Integral Energy Pinjara 330kV Tension Stringing – Downer
  • 2007

    Yass to Wagga Wagga 150km 132kV Transmission Line – Transgrid Nerang to Molendinar Tower Strengthening and OPGW Replacement – Energex Bayswater Power Station 330kV Transmission Line Relocations - Transgrid Bannaby 330kV Transmission Line Relocation – Transgrid Auburn Traction Substation – Railcorp Snowtown Wind-farm Electrical Reticulation - Downer Second Integral Energy Transmission Tower Refurbishment – 400 Towers Capital Wind-farm Design and Installation of 33kV Collector System – Downer Polia 40KM Transmission Line – Dept. Public Works
  • 2008

    Snowtown (South Australia) Wind-farm overhead collector system – Downer Ryhope Transmission Tower Replacement – Transgrid NJC achieve Environmental Third Party Certification (ISO14001)
  • 2009

    Bomen Zone Substation (66kV) Country Energy Bungendore Capital Hill Wind-farm Overhead Collector System – Downer Sydney and Newcastle 132kV Transmission Tower Refurbishment - Energy Australia NJC establish Construction Depot in Port Macquarie (NSW Mid North Coast) Swanbank Middle Ridge Transmission Line Refurbishment Trial – Powerlink (QLD) Alstonville Bypass HV Conflict Areas Relocations and Street-lighting Glenugie Pacific Highway High Voltage Conflict Area Relocations – McMahon
  • 2010

    Ashmont Zone Substation (66kV) Country Energy Building the Education Revolution, NSW Schools Grid Connections Tamworth and Gunnedah 66kV Transmission Lines – Country Energy
  • 2011

    Dapto Transmission Tower Refurbishment – Transgrid Liverpool 132kV Underground Feeders – Endeavour Energy Relocation of High Voltage Infrastructure Pacific Highway Tintenbar to Ewingsdale - RMS Dubbo 66kV Transmission line and underground feeder – Essential Energy Mackay Area Transmission Line Life Extension Works 57 Towers – Powerlink Dubbo to Yarrandale 2nd Feeder Construction of 6kms of 132kV O/H & 66KV U/G Transmission Line – Country Energy Bega To Cooma 132kV Transmission Line Stringing – Tenix Kempsey Bypass HV conflict areas relocations and streetlighting – KBP (Kempsey Bypass Alliance, Leighton Contractors)
  • 2012

    Sydney Liverpool 132kV Underground Feeders – Endeavour Energy Bega Bypass HV conflict areas relocations and streetlighting – John Holland Tintenbar to Ewingsdale HV Conflict Area Relocations and Street-lighting – Baulderstone Ewingsdale and Suffolk Park 132kV Underground Feeder and UGOH connections – Essential Energy Narromine South Switching Station to Narromine Town Zone Substation Construction of 132kV O/H Transmission Line – Essential Energy Waterford Park 66kV Overhead and Underground Feeders – Catholic Diocese Forbes to West Jemalong 66kV Transmission Line – Essential Energy Goulburn 66kV Transmission Line – Essential Energy Dubbo West Zone Substation to Narromine Construction of 132kV O/H Transmission Line – Essential Energy
  • 2013

    Queensland Mackay 132kV Transmission Tower Life Extensions – Powerlink Gullen Range Windfarm HV Grid connection – Goldwind Gullen Range Windfarm overhead collector system and transmission connection – CPP Cardwell Ranges Transmission Tower Painting – BBUGL
  • 2014

    Appointed to Powerlink Transmission Refit Panel Ewingsdale 132kV Transmission Line Relocation – RMS Riverina 66kV Feeder Relocations – NSW Public Works Nambucca Heads Highway High Voltage Conflict Area Relocations and Street-lighting Orange Highway Street-lighting – Orange Council Moree Bypass High Voltage Conflict Area Relocations and Street-lighting – Hazell Bros Lismore Hospital High Voltage Works – John Holland Boggabri Coal Mine High Voltage Connection - UGL
  • 2015

    Richlands to Sumner Tee Transmission Line Refit – Powerlink Vales Point Transmission Tower Refurbishment – Transgrid Moree Solar Farm Design and Construct Transmission Line Connection, Substation and Solar Farm Electrical Works – Green Light Australia
  • 2016

    Woologoolga to Ballina Highway High Voltage conflict area relocations Hunter Water High Voltage Distribution Network Upgrade Endeavour Energy Grillage Foundation Repairs
  • 2017

    Powerlink Proserpine Transmission Line Refurbishment Transgrid Transmission Support OPGW Installation Silverton Windfarm 220kv Transmission Line



A selection of projects that demonstrate NJ Construction’s ability to self perform on a diverse range of works and the depth of skilled team members and specialist plant and equipment within our group.

See All projects
Transgrid Bathurst

Transgrid Bathurst

Bodangora Wind Farm

Bodangora Wind Farm

Silverton Windfarm 220kV

Silverton Windfarm 220kV