Sung-Nam Choi

Ultra Construction & Engineering Co., Ltd. is engaged in provision of construction and engineering services. It operates through the following business divisions: Civil Works, Building Works, Plants and Tunnel Boring Machine. The Civil Works division constructs bridges, tunnels, roads, subways, railroads, and seaports. The Building Works division builds residential and commercial property and public facility. The Plants division provides plant towers and environmental industry construction services. The company was founded by Seog Hwan Kang on July 20, 1965 and is headquartered in Seoul, South Korea.

Hoban Construction Ltd. engages in the provision of construction services. It offers residential and commercial building construction and civil engineering services. The company was founded by Kim, Sang-Yeol in July 1996 and is headquartered in Seoul, South Korea.