Yiaw Heong Ng

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.

Technics Steel Pte Ltd. specializes in the manufacturing, fabrication, and installation of structural steel works. It serves commercial complexes, aircraft hangers, marine and offshore structures, civilian and military complexes, mining structures, hospital and wellness centers, and other sectors. The company was founded by Teck Heong Teo and Yiaw Heong Ng in 2013 and is headquartered in Singapore.