Tjhing Bo Oei

The American Society of Civil Engineers, founded in 1852, is the oldest national engineering society in America. The non-profit company is based in Reston, VA and has subsidiaries in the United States. With over 150,000 members worldwide, the organization advocates for sustainable and resilient practices to maintain and modernize the nation's infrastructure. The company also works to increase investment in infrastructure and improve engineering knowledge and competency. The society's Civil Engineering Landmark Program recognizes historically significant civil engineering projects, structures, and sites.

Part of Seroja Investments Ltd., L & M Geotechnic Pte Ltd. is a Singaporean company that provides geotechnical engineering services. The company is based in Singapore, Singapore.

Part of CSC Holdings Ltd., L&M Foundation Specialist Pte Ltd. provides construction services. The company is based in Singapore, Singapore. L&M Foundation Specialist was acquired by CSC Holdings Ltd. from Seroja Investments Ltd. on November 22, 2006 for $10.92 million.

Yongnam Engineering & Construction Private Ltd. provides engineering and construction services. The company is headquartered in Singapore.

DW Foundation Pte Ltd. provides micro and conventional piling and underpinning services. The company is headquartered in Singapore.

L&M Prestressing Pte Ltd. designs and constructs central expressway roads. The private company is based in Singapore, Singapore.