Jul 2026 -- present, Head and Hung Hing Ying Chair Professor of International Economics and Finance, Department of Economics and Finance, City University of Hong Kong

Dec 2022 -- Jul 2026, Chair Professor, School of Accounting and Finance, The Hong Kong Polytechnic University

Oct 2021 -- Jul 2026, Chair Professor, Department of Applied Mathematics, The Hong Kong Polytechnic University

Jul 2013 --  Sep 2022, Professor, Department of Mathematics, NUS

Jan 2010 -- Jun 2013, Associate Professor, Department of Mathematics, NUS

Jul 2004 -- Dec 2009, Assistant Professor, Department of Mathematics, National University of Singapore (NUS)

Jun 2002 -- Jan 2008, Lecturer (Jun 2022 - Jun 2003) and Associate Professor (Sep 2003 - Jan 2008), School of Mathematical Sciences, Peking University

Oct 2000 -- May 2002, Post-doctor, Institute of Mathematics, Peking University

Jun 2022 -- July 2026 Director, Research Centre for Quantitative Finance, The Hong Kong Polytechnic University

Mar 2020 -- Sep 2021, Director, Centre for Finance and Financial Risk Management, NUS Chongqing Research Institute

Jul 2018 -- Jul 2021, Program Director, NUS-SJTU Master of Science in Quantitative Finance, NUS

Jul 2014 -- Jul 2021, Director, Centre for Quantitative Finance, NUS

Nov 2014 -- Nov 2018, Deputy Director, Risk Management Institute, NUS

Jul 2012 -- Jul 2021, Program Director, Master of Science in Quantitative Finance, NUS

Jul 2010 -- Jun 2011, Visitor, Olin Business School, Washington University in St. Louis