Construction Machinery Corporation (COMA), established in 1995 from the former Union of Construction Machinery Enterprises (founded in 1975), is a state-owned enterprise under the purview of the Vietnamese Ministry of Construction. Headquartered in Hanoi, COMA specializes in manufacturing and trading mechanical equipment, steel structures, and undertaking construction projects for various sectors, including hydropower plants and thermal power plants. The company also provides design, consultation, and equipment installation services.