Mastermyne Group Limited provides contracting services to the underground long wall mining operations and industrial products and services in coalfields and supporting industries of Queensland and New South Wales, Australia. It operates in two segments, Mastermyne and Mastertec. The Mastermyne segment offers project management, labour and equipment hiring, underground roadway development, underground ventilation device installation, bulk materials handling system installation and relocation, and underground mine support services, as well as underground conveyor installation, extension, and maintenance services. The Mastertec segment provides a range of above-ground contracting services to ports, resources, industrial, and infrastructure sectors. Mastermyne Group Limited was founded in 1996 and is headquartered in Mackay, Australia.