2021 Mar 1- Present 

Dean of Qiuzhen College (QZC), Tsinghua University, China.

2020 Aug 7 - Present

Director, NanjingCentreForAppliedMathematics(NJCAM),China

2020 June 12 – Present

Director, Beijing Yanqi Lake Beijing Institute of Mathematical Sciences and Applications

2019 Feb 1 - Present

Distinguished Visiting Professor-at-Large, The Chinese University of Hong Kong

2017 July 7 - Present

Director, Shing-Tung Yau Center of Southeast University, Nanjing, China.

2015 Mar 19 – Present

Director, Yau Mathematical Sciences Center, China

2014 Jan 1- 2022 Apr 30

Director of the Center for Mathematical Sciences and Applications, Harvard University

2013 July1- 2022 Apr 30

Professor of Physics, Harvard University

2012 Apr1 – Present

Director of Shing-Tung Yau Center, National Chiao Tung University,Taiwan

2009 Dec17-2015Mar18

Director of the Mathematical Sciences Center, Tsinghua University, China

2008 July 1-2011 Jun 30

Chair of Department of Mathematics, Harvard University

2003 – 2019 Jan 31

Distinguished Professor-at-Large, The Chinese University of Hong Kong

2002 - Present

Director of the Centre of Mathematical Sciences at the Zhejiang University

1999 July1-2022 Apr 30

William Caspar Graustein Professor of Mathematics, Harvard University

1997 July 1-1999Jun 30

Higgins Professor of Mathematics, Harvard University

1996 Jun 10 - Present

Director of the Morningside Center of Mathematics (MCM) at Chinese Academy of Sciences

1994 Mar 1 - Present

Director of The Institute of Mathematical Sciences, The Chinese University of Hong Kong

1994 - 2003

Adjunct Professor of Mathematics, The Chinese University of Hong Kong

1987 July 1-2022 Apr 30

 Professor of Mathematics, Harvard University