| 2013-2017 |
Principal Lecturer and Programme Director, MSc in Environmental Management, School of Biological Sciences, Faculty of Science, The University of Hong Kong |
| 2012-2016 |
Deputy Master, New College, The University of Hong Kong |
| 2012-2013 |
Principal Lecturer, Programme Coordinator, MSc in Environmental Management, School of Biological Sciences, The University of Hong Kong |
| 2009-2012 |
Assistant Professor, School of Biological Sciences, The University of Hong Kong |
| 3 May 2005 – 2 May 2008 |
Warden, Morrison Hall, The University of Hong Kong |
| 2001-2009 |
Assistant Professor, Department of Ecology and Biodiversity, The University of Hong Kong |
| 1 February 1998 - 8 September 2001 |
Senior Conservation Officer, Kadoorie Farm and Botanic Garden, Lam Kam Road, Tai Po, New Territories |
| July 1991 to December 1994 |
From Assistant Conservation Officer to Senior Conservation Officer (July, 1993). World Wide Fund for Nature Hong Kong (WWF HK), No. 1, Tramway Path, Central, Hong Kong. |