Professor Tay Yong Chiang

Professor Department of Computer Science National University of Singapore
Fellow Tembusu College National University of Singapore

Professor Tay received his BSc (Hons) in Mathematics from the University of Singapore, and a PhD in Applied Mathematics from Harvard University. At Harvard, he was a member of the Senior Common Room and, later, a Resident Fellow at Lowell House.

After graduation, he worked for a start-up called Sequioa that was building a parallel transaction processing machine. Life in industry was not very interesting, so he returned from Boston to join the National University of Singapore, where he is now a professor in the  Department of Computer Science.

His research interest is mostly in performance modelling, i.e. writing equations to describe the behaviour of a computer system. He has received teaching awards from the Faculty of Science, the School of Computing and the University Town College Programme.

In his early years, he had wanted to be a carpenter, an adult, a nuclear physicist, and an electrical engineer.  He has spent sabbaticals at Princeton, MIT, Cambridge, UCLA, National Taiwan University, Microsoft, Intel, and VMware.

He can also be found at


Proof: What's truth got to do with it?


AY18/19 Residential Colleges Teaching Commendation Certificate
AY16/17 Residential Colleges Teaching Teaching Commendation Certificate
The Tembusu (Fagraea fragrans) is a large evergreen tree in the family Gentianaceae. It is native to Southeast Asia. Its trunk is dark brown, with deeply fissured bark, looking somewhat like a bittergourd. It grows in an irregular shape from 10 to 25m high. Its leaves are light green and oval in shape. Its yellowish flowers have a distinct fragrance and the fruits of the tree are bitter tasting red berries, which are eaten by birds and fruit bats.