Gwang-Young Yoon

Incheon Total Energy Co. provides heating and cooling services, through eco-friendly facilities, to local areas around Songdo city. Its services include supplying hot and cold water, heat, and cool air to residential and commercial buildings. The company was founded on June 10, 2004 and is headquartered in Incheon, South Korea.

GS Energy Corp. engages in support activities for oil and gas operations. The company was founded on January 3, 2012 and is headquartered in Seoul, South Korea.

Daejung Em Co., Ltd. engages in the manufacture of basic inorganic chemical materials. The company was founded on September 21, 2000 and is headquartered in Iksan, South Korea.

Haeyang Energy Co., Ltd. distributes natural and liquefied petroleum gas. The firm also sells gas related products. It supplies gases to cities and provincial areas including Hwasun, Gwangju, Jangseong, Damyang and Haenam. The company was founded on May 11, 1982 and is headquartered in Gwangju, South Korea.

GS Platech Co., Ltd. develops industrial oven and burners. It engages in the engineering, procurement, construction, and test operation of plasma gasification and vitrification plants, and low and intermediate level radioactive waste vitrification plants. The company was founded in July 2001 and is headquartered in Daejeon, South Korea.

GS Power Co. Ltd. owns & operates power plants and heating facilities. The firm's plant generates and sells electric power. The company was founded on June 7, 2000 and is headquartered in Anyang-si, South Korea.

GS Donghae Electric Power Co., Ltd. constructs and operates thermal power plants. The company was founded on August 9, 2011 and is headquartered in Donghae, South Korea.