TTCL Public Company Limited, along with its subsidiaries, specializes in integrated engineering, procurement, and construction (EPC) services for industrial facilities, operating both domestically in Thailand and internationally. The company's diverse activities are organized into four primary divisions: Energy Business, Construction Business, Manufacturing and Distribution of White Pallets, and Licensing of Torrefaction Technology. Its services encompass detailed engineering design for various industrial infrastructures, including civil works, essential utility systems (such as power, water, air conditioning, and waste treatment), storage facilities, production processes, and chemical/petrochemical plants. Furthermore, TTCL manages the procurement of necessary equipment and machinery and undertakes the construction of these plants. Within the energy sector, it generates and sells electricity from natural gas and solar power plants, actively developing and investing in renewable energy projects and broader energy ventures. The company also provides comprehensive advisory services, ranging from initial conceptual studies to thorough pre-feasibility and detailed feasibility analyses. Founded in 1985 and based in Bangkok, Thailand, TTCL Public Company Limited adopted its current name in April 2015, having previously been known as Toyo-Thai Corporation Public Company Limited.