Downer Infrastructure

Downer Infrastructure

Downer Infrastructure operates predominantly in Australia and New Zealand and is one of the largest providers of engineering services for critical infrastructure in both countries, employing more than 10,000 people in Australia and more than 4,500 in New Zealand.

Downer Infrastructure is one of Australia’s leading providers of electrical and instrumentation (E&I) services. It has over 70 years’ experience in this field and the services it offers cover the full asset lifecycle including concept development, design, engineering procurement and project management as well as maintenance activities.

Downer Infrastructure’s plant and construction capabilities also include civil, structural and mechanical services.

Downer Infrastructure has also been providing engineering, construction, commissioning and maintenance services to the power, transmission and electricity distribution markets for more than 50 years. These services cover the whole lifecycle of customers’ assets, from design and planning through to operation and maintenance in areas including transmission lines, substations, distribution and renewable energy.

Downer Infrastructure also offers one of the largest non‑government owned road infrastructure services businesses in both Australia and New Zealand, maintaining more than 40,000 kilometres of road in Australia and more than 32,000 kilometres in New Zealand. The road infrastructure market in both countries is evolving from pure road maintenance activity to the provision of efficient road network infrastructure management solutions. Downer has responded successfully to this evolution by investing in technology and forming strategic partnerships, for example with the UK-based company Mouchel. Downer has a vertically integrated model and is a leading producer of asphalt in Australia. Downer’s road infrastructure customers include all Australia’s State road authorities and the New Zealand Transport Agency.

A substantial portion of revenue in New Zealand is derived from government customers including the New Zealand Transport Agency, local councils, government-owned businesses and agencies. Downer is a member of the Stronger Christchurch Infrastructure Rebuild Team (SCIRT) that is rebuilding Christchurch’s earthquake-damaged roads, sewerage, water supply pipes and parks. 

In the Australian telecommunications sector, Downer builds, operates and maintains network and wireless infrastructure for customers including Foxtel, Telstra and the National Broadband Network (NBN). In New Zealand, Downer is a major supplier to New Zealand’s three main telecommunication providers – Chorus, Vodafone and Telecom.

For public sector and industrial water customers in Australia, Downer provides design and construction, operations and maintenance services for water and waste water infrastructure. The New Zealand business offers complete asset lifecycle solutions (design, build, operate and maintain) for municipal and industrial water, wastewater treatment plants and reticulation networks.


Downer announced on 20 October that that it has signed an agreement to acquire all of the shares in Tenix Holdings Australia Pty Limited (Tenix) for $300 million on a cash and debt free basis. The completion of this sale was made on 31 October and marks the beginning of an exciting new business and growth opportunity for Downer. 

DownerTenix is a leading delivery partner to owners of gas, electricity, water, wastewater, heavy industrial and mining assets across Australia New Zealand and the Pacific.

For utility asset owners, we design, construct, operate, maintain and manage electricity, gas, water, wastewater and other network assets.

For mining, mineral processing, oil, gas and petrochemical and other manufacturing companies, we design, fabricate, construct, install and maintain plant and supporting infrastructure.

Our vision is to be the leading sustainable infrastructure solutions, services and delivery partner. We work collaboratively with our customers to achieve shared goals and sustainable outcomes.

Find out more by visiting the DownerTenix website.


Downer Infrastructure also operates three subsidiary companies that offer innovative services to customers in the mining and resources sector:

  • Mineral Technologies is a leading provider of mineral separation and mineral processing solutions worldwide, delivering a comprehensive range of integrated equipment and services that cost-effectively transform ore bodies into high grade mineral products;
  • QCC Resources delivers process and materials handling solutions for all stages of the project lifecycle from initial concept, prefeasibility and feasibility studies, to innovative coal handling preparation plant (CHPP) design and engineering, procurement and construction management (EPCM); and
  • Snowden provides consultancy services on a wide range of mineral commodities to customers around the world.



>> View the Downer Infrastructure New Zealand capability brochure