HD Hyundai Heavy Industries (HHI, HD현대중공업주식회사) is a company that operates through offshore and engineering, shipbuilding, naval and special ship, and engine and machinery business units. Its shipbuilding division specializes in building ships and the offshore and engineering division provides engineering, procurement, construction, offshore transportation, installation, and commissioning services for oil and gas production facilities. The company’s naval and special ship business unit provides maritime security solutions and the engine and machinery business unit offers diesel engines for marine and stationary purposes.