Demco Public Company Limited, together with its subsidiaries, engages in the provision of electric system construction and service works in the fields of electric engineering and telecommunication in Thailand. The company operates through six segments: Sales, Electricity from Solar Power, Electrical Work Services, Engagement Work Services, Other Services, and Sales and Providing Service to Biomass Power Plant. The Sales segment produces and sells steel structure fabrications for electrical and telecommunication works; and water. The Electricity from Solar Power segment generates and sells electricity from solar power. The Electrical Work Services segment designs, constructs, and manages electrical work. The Engagement Work Services segment produces and installs fabricated steel structures and high-pressure vessels. The Other Services segment provides civil work, communication, and other services. The Sales and Providing Service to Biomass Power Plant segment engages in the operating service and maintenance of biomass power plant; and offers biomass fuel. The company also manufactures and trades in steel supporting structures and steel towers; and trades in assembled telecommunication equipment, communication equipment, and electrical equipment, as well as sells construction materials, and manufacture and sale of galvanized structure steel and electrical equipment. In addition, it invests in projects of renewable energy generation and utilities system, including wind energy, solar farm, and solar roof projects. Further, the company design, procurement, construct, test, install, and maintain electrical engineering, renewable energy, signaling and communication, mechanical and electrical, telecommunication tower, and energy conservative work. Additionally, it operates in renewable energy of an utility systems; and electricity generation and transmission business. Demco Public Company Limited was incorporated in 1992 and is headquartered in Pathum Thani, Thailand.