| Oct 2019 – Present | Visiting Professor, National Taiwan University; Professor, City University of Hong Kong |
| Mar 2016 – Aug 2019 | Head and Professor, City University of Hong Kong |
| June 2015 – Feb 2016 | Acting Head and Professor, City University of Hong Kong |
| Oct 2012 – July 2013 | Associate Dean and Professor, City University of Hong Kong |
| July 2011 – Sep 2012 | Associate Head and Professor, City University of Hong Kong |
| 2003 – June 2011 | Associate Professor, City University of Hong Kong |
| 1998 - 2002 | Assistant Professor, City University of Hong Kong |
| Director, Center for Social Media Marketing and Business Intelligence (July 2012 – Present) |
| Senior Editor, Journal of AIS (Dec 2010 – Present) |
| Associate Editor, Information Systems Research, (January 2017-Present) |
