Macau E&M Holding Limited, an investment holding company, provides electrical and mechanical engineering contract works in Macau. The company engages in the supply, installation, maintenance, and repair of low voltage systems; heating, ventilation, and air-conditioning systems; and extra low voltage system works, as well as provides related testing and commissioning services. It also offers management and monitoring services; and repair and maintenance service for property and hospitality facilities. The company was founded in 2011 and is headquartered in Macau.