Joe Barr

John Holland Pty Ltd. provides construction and engineering services. It offers contracting and services capabilities, from tunneling, building and civil construction solutions in the infrastructure sector to the delivery of water and environment, energy, minerals, and industrial projects in the energy and resources sector. The firm also provides services to the transport sector and specializes in railway construction, operations and maintenance, aviation services, and ports infrastructure and maintenance. The company was founded in 1949 and is headquartered in Melbourne, Australia.

Australian Constructors Association Ltd. is an association that represents construction and infrastructure contracting firms. Its member companies operate in a number of industry sectors including engineering construction, process engineering, contract mining, oil and gas operations, and telecommunications. The company is headquartered in North Sydney, Australia.

John Holland Group Pty Ltd. provides infrastructure and property development services. It offers services to airports, commercial development and leasing, education and research, health care, industrial and resources, government, residential, private sector, tourisms, and energy sectors. The company was founded by John Holland on May 16, 1949 and is headquartered in Melbourne, Australia.

Hansen Yuncken Pty Ltd. provides construction services. Its projects include commercial, community, defence and education. The company was founded by Otto Yuncken and Lauritz Hansen in 1918 and is headquartered in Melbourne, Australia.