CH. Karnchang Public Co. Ltd. engages in the provision of general construction services. It operates through the following segments: Construction and Related Service, and Investment in Infrastructure Business. The Construction and Related Service segment operates as a contractor through bidding process or negotiation, to project owners and accepts work from other contractors. The Investment in Infrastructure Business segment invested in regional, comprehensive infrastructure project development business, including transportation system, mass rapid transit system, water infrastructure system and energy system. The company was founded on November 27, 1972 and is headquartered in Bangkok, Thailand.