Koh Brothers Eco Engineering Ltd. is an investment holding company, which engages in the provision of engineering solutions. 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.