2021.9-present Executive Director, PREPARE (Programme for Research in Epidemic Preparedness and Responses), Singapore
2020.9-present Professor, Program in Emerging Infectious Diseases, DukeNUS Medical School, Singapore
2012.7-2020.8 Director and Professor, Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore
2008.3-2015.8 OCE Science Leader, CSIRO Australian Animal Health Laboratory, Geelong, Vic.
2004.7-2008.2 Senior Principal Research Scientist and project leader, CSIRO Australian Animal Health Laboratory, Geelong, Vic.
2003.7-2010.6 Project Leader, Australian Biosecurity Cooperative Research Centre for Emerging Infectious Diseases (AB-CRC), Brisbane, Qld.
1996.7-2004.6 Principal Research Scientist and project leader, CSIRO Australian Animal Health Laboratory, Geelong, Vic.
1992.7-1996.6 Senior Research Scientist and project leader, CSIRO Australian Animal Health Laboratory, Geelong, Vic.
1990.12-1992.6 Research Scientist, CSIRO Australian Animal Health Laboratory, Geelong, Vic.
1990.5-1990.12 Senior Research Officer, the Centre for Molecular Biology and Medicine, Monash University, Clayton, Vic.
1989.5-1990.5 Senior Tutor, Department of Biochemistry, Monash University, Clayton, Vic.
1986.7-1989.3 Postdoctoral Research Fellow, Department of Biochemistry, University of California, Davis
2012.7-present Professor, Program in Emerging Infectious Diseases, DukeNUS Graduate Medical School, Singapore
1996.2-2015.8 Supervisor for Ph.D. and Honours students, CSIRO Australian Animal Health Laboratory, Geelong, Vic.
1989.5-1990.5 Senior Tutor, Department of Biochemistry, Monash University, Clayton, Vic.
1989.3-1989.5 Associate Professor, Department of Biology, East China Normal University, Shanghai.
1983.9-1984.6 Teaching Assistant, Department of Biochemistry, University of California, Davis.
1982.1-1982.9 Assistant Teacher, Department of Biology, East China Normal University, Shanghai.
Honorary Professor, University of Melbourne (2009-)
Honorary Professor, Wuhan Institute of Virology, Chinese Academy of Sciences (2005-)
Honorary Professor, East China Normal University (2017-)