TTCL Public Company Limited, together with its subsidiaries, designs, procures, and constructs integrated industrial factories in Thailand and internationally. It operates through three segments: Energy Business, Construction Business, and Manufacturing and Distribution. The company provides engineering design services for civil structures and utility systems, such as electricity, water, air conditioning, solid and wastewater treatment systems, storage tanks, production processes, and petrochemical and chemical plants, as well as engages in the procurement of machinery and equipment. It also generates and sells electricity, as well as invests in and develops renewable energy power plants and invests in energy business. In addition, the company offers conceptual, pre-feasibility, and detailed feasibility study services; manufactures and distributes white pallets; and provides torrefaction technology license. The company was formerly known as Toyo-Thai Corporation Public Company Limited and changed its name to TTCL Public Company Limited in April 2015. The company was incorporated in 1985 and is headquartered in Bangkok, Thailand. TTCL Public Company Limited is a subsidiary of Italian-Thai Development Public Company Limited.