Darco Water Technologies Ltd. is an investment holding company, which engages in the construction and management of water treatment systems. It operates through the Projects and O&M Services segments. The Projects segment is involved in contracts to design, fabricate, assemble, install, and commission engineered water systems for industrial application, engineered vacuum solution and service concession revenue. The O&M Services segment focuses on services and maintains water and wastewater treatment plants, water supply as well as trades and supplies of goods comprising chemicals, electrical controls, and related instruments used in water treatment systems. The company was founded by Swee Heng Teh in 1999 and is headquartered in Singapore.