DDH1 Limited 

DDH1 Limited provides specialized surface and underground drilling services to mining and exploration operations in Australia, North America, and Western Europe. It operates through Drilling Operations and Engineering Operations segments. The company offers diamond core drilling services for near-mine exploration, mine development, and production drilling activities; reverse circulation and air core drilling services for earlier stage exploration drilling activities; and grade control, diamond core, reverse circulation, and water bore drilling services to the iron ore industry. It also involved in the underground diamond core drilling services for development and production of underground mining operations; and construction of drill rigs. In addition, the company sells rigs and parts. DDH1 Limited was founded in 2006 and is headquartered in Canning Vale, Australia.