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, Electrical and Mechanical Work Services, Engagement Work Services, and Other Services. The Sales segment produces and sells steel structure fabrications for electrical and telecommunication works, as well as supplies 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 Electrical and Mechanical Work Services segment designs, constructs, and manages mechanical and electric systems and facilities, such as electrical, water management, air-conditioning and ventilation, and steam and hot water systems. 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. It also manufactures and trades in steel structures and steel towers; and trades in assembled telecommunication equipment, communication equipment, and electrical equipment, as well as sells construction materials. The company was incorporated in 1992 and is headquartered in Pathum Thani, Thailand.