Tji Kiong Koh

Part of Hasko Group, PT Putra Sumber Utama Timber is an Indonesian company that manufactures and distributes timber and plywood products. The company is based in Jakarta, Indonesia.

Part of Samko Timber Ltd., PT Sumber Graha Sejahtera provides timber. The company is based in Jakarta, Indonesia. Aris Sunarko has been the CEO of the Indonesian company since 2006. PT Sumber Graha Sejahtera was acquired by Three Six Nine Ltd. on August 09, 2006.

PT Wijaya Triutama Plywood Industry is a plywood manufacturing private company based in Indonesia. The Indonesian company produces a variety of plywood products including General Panels, Thin Panels, Floorbase, and Special Sizes. The company was established in 1981 and has since continued to innovate and improve their products. The company believes in sustainable business practices that add value to their country, employees, buyers, and suppliers. The production process involves storing logs in a log pond, lifting them to the cutting deck for processing, and then using a rotary to create the plywood.