Koh Brothers Eco Engineering Ltd. engages in the provision of engineering solutions for water and wastewater treatment, hydro-engineering, bio-refinery, and bio-energy projects. It operates through the Engineering and Construction, and Bio-Refinery and Renewable Energy segments. The Engineering and Construction segment offers EPC services for construction and civil engineering projects. The Bio-Refinery and Renewable Energy segment delivers edible oil refining plants, turnkey outside-battery-limits infrastructure, engineering, downstream high value niche processes, and specialty products. The company was founded by Tze Wen Tay on January 20, 1975 and is headquartered in Singapore.