| 2019/10 - Present | Visiting Professor, National Taiwan University; Professor, City University of Hong Kong |
| 2016/3 - 2019/8 | Head and Professor, City University of Hong Kong |
| 2015/6 - 2016/2 | Acting Head and Professor, City University of Hong Kong |
| 2012/10 - 2013/7 | Associate Dean and Professor, City University of Hong Kong |
| 2011/7 - 2012/9 | Associate Head and Professor, City University of Hong Kong |
| 2003 - 2011/6 | Associate Professor, City University of Hong Kong |
| 1998 - 2002 | Assistant Professor, City University of Hong Kong |
| 2012/7 - Present | Director, Center for Social Media Marketing and Business Intelligence |
| 2010/12 - Present | Senior Editor, Journal of AIS |
| 2017/1 - Present | Associate Editor, Information Systems Research |
