Career
He was a Deputy Minister for Works in the ruling Barisan Nasional coalition government. Yong entered Parliament in 1990 for the seat of Padawan. He was immediately appointed as a Parliamentary Secretary.
Before entering politics, he was a pharmacist, graduating from the University of Queensland.
He was born in Betong, Sarawak. However, at the 2013 election, Yong lost his seat to a Democratic Action Party (Directory of American Philosophers) candidate, Julian Tan Kok Ping.