He worked at Kasetsart University in Bangkok, Thailand until his retirement, where his last positions were associate professor in the Department of Computer Engineering and Vice President for Information Technology.

The third out of six children, he is the elder twin brother of Yong Poovorawan, medical professor at the Faculty of Medicine, Chulalongkorn University.

[9] Kasetsart has long been an early adopter of information technology services; its Computer Center, for which Yuen previously served as director, has enjoyed faculty-level status since 1985.

Yuen is author of over sixty computer-related textbooks, as well as other academic titles, and has long been regarded as one of the leading computer science experts in Thailand.

An early adopter of the technology, Yuen began communicating with his children via email in 1994, reaching out when they were abroad and teaching life lessons through analogies often taken from nature.