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CPB Contractors

CPB Contractors is an Australian construction company delivering major infrastructure and building projects across Australia, New Zealand and other regional markets.

Last updated October 30, 2026

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Overview

CPB Contractors is a major construction and infrastructure contractor whose origins date to 1927. The present CPB Contractors brand began in January 2016, when two Australian CIMIC Group construction businesses, Leighton Contractors and Thiess Construction, merged. The company describes its work as constructing complex and critical infrastructure and says it has been delivering projects for clients and communities for more than 90 years, reflecting the histories of its predecessor businesses rather than the age of the CPB Contractors name. The company works across Australia and New Zealand, with operations also spanning Papua New Guinea. Its stated areas of activity include roads, rail, tunnelling, defence, building, resources, water and new-energy infrastructure. Its services cover transport and civil infrastructure, bridges, buildings, tunnelling and project delivery. Building work includes commercial, industrial, education, justice, social-infrastructure, sports and recreation projects. The company also identifies tunnelling work across transport and utilities in Australia, New Zealand and Southeast Asia. CPB Contractors presents itself as a collaborative project-delivery partner, emphasizing safety, risk management, delivery systems and collaboration with clients and delivery partners. Its stated purpose is to deliver infrastructure that connects communities, supports economic growth and creates skills and careers. The company reports substantial experience in rail, tunnels, roads, social and health infrastructure, water projects and new-energy projects. Its website also highlights work with Indigenous suppliers and acknowledges Aboriginal and Torres Strait Islander peoples and Traditional Custodians. CPB Contractors is part of CIMIC Group and says it benefits from the group’s engineering-led capabilities and international parent company HOCHTIEF, based in Essen, Germany. The brand remains active and markets its construction and project-delivery capabilities to public- and private-sector clients. It does not publish a founder or headquarters location in the supplied evidence.

History

CPB Contractors traces its construction origins to 1927, although the CPB Contractors name dates from January 2016. The company was formed through the merger of two Australian CIMIC Group construction businesses, Leighton Contractors and Thiess Construction. Its origins page connects the brand’s visual identity to CIMIC Group and notes that orange reflects Leighton heritage dating to 1949. The company’s history includes work on transport, energy, building and civil infrastructure. Its origins page identifies a 1949 rail project involving duplication of the Longwarry–Yarragon line in Victoria, and the 1954 delivery of the Tooma–Tumut Tunnel for the Snowy Mountains Hydro Electric Scheme. The company’s broader description says its tunnelling experience reaches back to 1954, when it became the first Australian company awarded a major construction project on that scheme. Later projects listed by the company include Canberra Stadium in 1977; a new domestic terminal and two runways at Brisbane Airport in 1988; Star City Casino in Sydney in 1997; widening of the Second Narrows Road Bridge in Perth in 2001; and delivery of 17 interchanges and 38 underpasses and overpasses for Sydney’s M7 Westlink in 2005. The company also lists construction of twin three-lane tunnels for the Eagle’s Nest Tunnel and Sha Tin Heights Tunnel in 2008. These examples illustrate the breadth of work undertaken across the histories from which the present company developed. Since its formation, CPB Contractors has presented itself as an infrastructure contractor operating across Australia and New Zealand, with operations spanning Papua New Guinea and tunnelling activity in Southeast Asia. Its stated sectors include roads, rail, tunnelling, defence, buildings, resources, water and new energy. It says its delivery approach combines safety, risk management, systems and technology with collaboration among clients, communities and delivery partners. CPB Contractors remains part of CIMIC Group and says it is backed by international parent HOCHTIEF.

  • 2016

    CPB Contractors formed

  • 2008

    Eagle’s Nest and Sha Tin Heights tunnels

  • 2005

    M7 Westlink

  • 2001

    Second Narrows Road Bridge widening

  • 1997

    Star City Casino

  • 1988

    Brisbane Airport works

  • 1977

    Canberra Stadium

  • 1954

    Tooma–Tumut Tunnel

  • 1949

    First rail project cited

  • 1927

    Construction origins

Products and positioning

A collaborative major contractor focused on complex, critical infrastructure, with an emphasis on safe delivery, risk management and certainty for clients and communities.

  • Transport infrastructure

    Delivery of road, rail, bridge, civil works and related transport projects.

  • Tunnelling

    Tunnelling for transport and utility sectors across Australia, New Zealand and Southeast Asia.

  • Building

    Complex projects across commercial, industrial, education, justice and social-infrastructure sectors.

  • Water and new-energy infrastructure

    Projects including water, dams and reservoirs, as well as new-energy infrastructure.

Controversies

  • 2019

    CPB Contractors convicted and ordered to pay $445,000

    The Land and Environment Court convicted CPB Contractors after it pleaded guilty to four offences of emitting offensive odour from the St Peters M5 interchange construction site. The court ordered payments totaling $445,000, including $295,000 to the Environmental Trust and $150,000 to the NSW Environment Protection Authority for investigative and legal costs. The EPA said the odours caused substantial harm to the community and affected human health.

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Recent events

  • CPB Contractors convicted and ordered to pay $445,000[6]

    Reported:

    The Land and Environment Court convicted CPB Contractors after it pleaded guilty to four offences of emitting offensive odour from the St Peters M5 interchange construction site. The court ordered payments totaling $445,000, including $295,000 to the Environmental Trust and $150,000 to the NSW Environment Protection Authority for investigative and legal costs. The EPA said the odours caused substantial harm to the community and affected human health.

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