David Graeme Stewart

CIMIC Group Ltd. is engaged in the operations of infrastructure, resources, and property markets. It operates through the following segments: Construction, Services, and Corporate & Investments. The company was founded by Stanley Ellis Leighton in 1949 and is headquartered in North Sydney, Australia.

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.

Thiess Pty Ltd. provides engineering and related services in Australia and Asia. Its services include mining, civil engineering, processing, building, environmental and utilities services, and facilities operations and maintenance. The company was founded in 1934 and is headquartered in South Bank, Australia.

The Leighton Group, Inc. provides geo-technical and environmental services. The firm serves commercial, industrial, education, public buildings and transportation sectors. The company was founded in 1979 and is headquartered at Irvine, CA.