Hui Weng Tat has taught labour economics and policy at the Department of Economics at NUS. His current research interests are focused on the economic issues of migration and education, the impact of globalisation on labour markets and labour market policy issues in Singapore. He has published in international labour and public economics journals, and co-edited and contributed to the book Singapore Economy in the 21st Century: Issues and Strategies (McGraw Hill). He has acted as a consultant to the Ministry of Manpower, the International Labour Organization and was the Associate Research Fellow of the then Singapore Institute of Labour Studies from 1991-1994.

He also served as a resource person to the National Wages Council and was a member of the Economic Review Sub-Committee Work Group on Wages and the Institute of Policy Studies Economic Restructuring Working Group. He has held various administrative appointments which include Deputy Director of the Public Policy Programme (1997 - 1998), Deputy and Acting Head of the Department of Economics (1998 - 2000), Vice Dean (Research & Graduate Studies) of the Faculty of Arts and Social Sciences (2000 - 2003) and Vice Dean (Academic Affairs) of the Lee Kuan Yew School of Public Policy (2004 - 2008).