Yong-Soo Heo

Sungsan Group Corp. provides non-residential building rental services. The CEO of the South Korean company is In-Young Huh.

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.

GS Caltex Corp. is engaged in the oil refining business. The company was founded on May 19, 1967 and is headquartered in Seoul, 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 EPS Co., Ltd. generates and supplies electricity. The firm operates liquefied natural gas fire combined cycle, biomass and fuel cell power plant. It constructs thermal power plant and smart grid. The company was founded on October 9, 1996 and is headquartered in Dangjin, South Korea.