CH. Karnchang is one of Thailand's leading general contractors and basic infrastructure developers. It has more than 40 years of successful experience in the construction business of large-scale infrastructure, building complex and general civil works. The company has earned prestige for its high work execution capability since it was established in 1972. Besides construction, it has been investing since 1987 in the government's concession projects to expand its operations and generate long-term steady income.