David Slack-Smith

Broadspectrum Ltd. engages in the provision of engineering, construction and maintenance. It operates through the following segments: Infrastructure, Defence, Social and Property, Resources and Industrial, Americas, and Corporate. The Corporate segment provides governance services including finance, legal, risk management and corporate secretarial functions. The company provides logistics and facilities management, construction, consulting, operations and maintenance, and well servicing. The company was founded by Franco Belgiorno-Nettis in 1956 and is headquartered in North Sydney, Australia.

Roc Oil Co. Pty Ltd. is an upstream oil and gas company, which engages in exploration of oil and natural gas. It operates across the range of upstream business activities from exploration and appraisal to development and production delivery. The company was founded by Robert John Patrick Doran in 1997 and is headquartered in Sydney, Australia.