Tan Sri Datuk Tee Hock Seng JP was appointed to the Board since the incorporation of KL-Kuala Selangor Expressway Bhd. on 14 November 1996 and was subsequently appointed as an Executive Director on 1 November 2008. He is an experienced entrepreneur with more than 40 years business acumen in trading, construction and development.

Tan Sri Datuk Tee was appointed a member of the Senate (Ahli Dewan Negara), Parliament of Malaysia on 15 July 2008 for the duration of three years.

Presently, he is an Exco member of Malaysia South-South Association and Perdana Leadership Foundation. He is also a Director of Malaysian South-South Corporation Berhad and Malaysian Industry-Government Group for High Technology ("MiGHT").

He also serves as the Treasurer-General of Malaysian Chinese Association ("MCA") Headquarters, Chairman of MCA Wilayah Persekutuan State Liaison Committee, Division Chairman of MCA Bahagian Cheras, President of The Federation of Hokkien Associations of Malaysia, Chairman of Malaysia Quarries Association, Honorary Chairman of The International Fellowship of Eng Choon Associates, Deputy President of the Associated Eng Choon Societies of Malaysia, Vice President of Kuala Lumpur Eng Choon Hoey Kuan, Chairman of Chinese Maternity Hospital (CMH), Director of Tung Shin Hospital and Confucian Secondary School. He is also the Honorary Chairman of Young Malaysians Movement, Xiang Lian Youth Association as well as a Council Member of Malaysian Bible Seminary. He is also an Elder of Elim Chapel.

He was accorded by the Construction Industry Development Board the 2005 "Most Prominent Player award", one of the highest individual accolade recognised by the industry.