Poh Lim Yian

TTJ Holdings Ltd. engages in the design, supply, fabrication, and erection of structural steelworks for use in the construction of buildings, factories, plants, and infrastructures. It operates through the following segments: Structural Steel, Waste Management & Treatment, and Other. The Structural Steel segment caters to the residential, commercial, and industrial sectors. The Other segment operates a testing center and also includes the investment holding activities of the company. Its products include aluminum parapets and bomb shelter door. The firm also offers structural, mechanical, and specialized engineering services. The company was founded by Chwee Teo Hock in July 1981 and is headquartered in Singapore.

Zicom Holdings Pte Ltd. operates an investment holding company. It specializes in marine deck machinery, fluid regulating and metering stations, transit concrete mixers, mechanical and hydraulic. The company was founded by Giok Lak Sim in 1978 and is headquartered in Singapore.