CH. Karnchang PCL completes various construction and infrastructure projects. It accepts orders from government agencies, state enterprises, and private entities. The company operates as a main contractor, winning contracts through the bidding process and negotiations, or as a subcontractor for other entities. The company has two operating segments: construction and related service (majority of total sales), and investment in infrastructure business. Infrastructure projects are primarily related to transportation, water treatment systems, and energy production. In certain situations, Ch Karnchang receives concessions from government entities to build public systems, and may receive the rights to continue operation upon completion. The majority of its revenue is derived from Thailand.