Koh Tieh Yong graduated from Imperial College with First Class Honours in Physics in 1994 and obtained his PhD in Atmospheric Science from Massachusetts Institute of Technology in 2001. He was a Visiting Scientist with Ecole Polytéchnique at Laboratoire de Météorologie Dynamique for a summer before joining Temasek Laboratories at National University of Singapore as a research scientist in Nov 2001. In 2004, he became an Assistant Professor at School of Physical and Mathematical Sciences, Nanyang Technological University. In 2013 he obtained his tenure as Associate Professor. In 2016, he joined a team of pioneering educators at SIM University to build up Singapore's sixth autonomous university, later named Singapore University of Social Sciences. He presently teaches Sustainability Science.

Tieh Yong received Koh Boon Hwee Scholars Award three times in 2011-2012 for inspirational teaching and Nanyang Education Award in 2013. He was one of three examiners in Asian Physics Olympiad 2014. In research, he was an expert reviewer for 2013 Fifth Assessment Report of Inter-governmental Panel for Climate Change and contributed to 2021 ASEAN State of Climate Change Report commissioned by ASEAN Working Group on Climate Change. As of July 2021, he is serving in Madden-Julian Oscillation Task Force and Asia-Australia Monsoon Working Group, under World Meteorological Organization. He is a secretary for Atmospheric Sciences section of Asia-Oceania Geosciences Society and an editor for the journal "Scientific Online Letters on the Atmosphere".

Tieh Yong is passionate about fluid dynamics, geophysical mixing & transport, tropical atmospheric dynamics, and multi-scale interactions between weather and climate in Southeast Asia. He seeks to apply his knowledge for the advancement of society, especially in support of sustainable development.