PT Delta Dunia Makmur Tbk, through its subsidiaries, operates as a coal mining contractor in Indonesia and Australia. The company operates in Coal Mining, Mining Services, and Investment Segments. The company provides overburden removal, coal mining, and coal hauling, and reclamation services. It also offers open cut mine sites, statutory management, greenfields?development and start-up, mine planning, asset management, drill and blast services, processing plant operations and maintenance, rehabilitation and closure, cost analysis and proposals, safety, health and environment, people management, and mine engineering services. In addition, it offers vocational education, circular economy innovation, and community empowerment services. The company was founded in 1990 and is headquartered in Jakarta, Indonesia.