David Sproule

Australasian Institute of Mining & Metallurgy, also known as AusIMM, is the leading organization for professionals working in the resources sector. AusIMM is based in Carlton, Australia, and has subsidiaries in Hong Kong. The Australian company's main focus is on shaping careers, showcasing leadership, creating communities, and upholding standards.

Marda Operations Pty Ltd. engages in the acquisition, exploration, and development of mineral properties. It exploits nickel, copper, and iron ore. The company was founded on March 12, 2007 and is headquartered in Brisbane, Australia.

Polymetals Mining Ltd. engages in the acquisition, exploration, development and operation of precious and base metals resource projects. The firm projects include Mt Boppy Gold Mine, Canbelego Exploration, White Dam Gold Project and Drew Hill Exploration. The company was founded by David Willaim Sproule in 1986 and is headquartered in Samford, Australia.

Part of Polymetals Resources Ltd., Golden Guinea Resources SARL provides gold exploration services. The company is based in Dubréka, Guinea. Golden Guinea Resources was acquired by Polymetals Resources Ltd. on January 31, 2021.