Emilio Grande Royo-Villanova

IRIDIUM Concesiones de Infraestructuras SA engages in the provision of civil infrastructure engineering, construction, operation, and maintenance services. It develops, finances, invests, manages, operates, administrates, maintains, conserves, restores, and prepares government concessions involving transport and public infrastructure works. The company was founded in 1967 and is headquartered in Madrid, Spain.

UGL Pty Ltd. provides outsourced engineering, construction, asset management, and maintenance services. The firm's expertise include engineering design, construction, manufacturing, Ops and maintenance, asset management, upgrades and overhauls and facilities management. It serves in the area of power, water, resources, transport, defence and security, social infrastructure sectors. The company was founded in 1970 and is headquartered in North Sydney, Australia.

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.