– Assistant, Associate, Full, Distinguished, & Distinguished (II) Professor, Department of Microbiology, College of Medicine, National Taiwan University, 2000~2003~2007~2013~2020~current
– Director, Office of Research Integrity, National Taiwan University, 2019~current
– Associate Director, Center of Genomics and Precision Medicine, National Taiwan University, 2017~current
– Supervisor, Taiwan Society of Research Ethics, 2022~current
– Chairperson, Aging Study Section, National Health Research Institute, 2023
– Deputy Director, Graduate Institute of Immunology, College of Medicine, National Taiwan University, 2021~2022
– Supervisor, Taiwan Society of Cell and Molecular Biology, 2019, 2020, 2022
– Reviewer Board, Cancer Study Section, Ministry of Health and Welfare, 2017~2018
– Reviewer Board, Cancer Study Section, National Health Research Institute, 2015
– Chairperson, Life Science Section, National Science Council, 2013~2015
– Associate Dean, College of Medicine, National Taiwan University, 2012~2019
– Director, Ph.D. Program in Translational Medicine, National Taiwan University and Academia Sinica, 2012~2019
– Director, Department of Microbiology, College of Medicine, National Taiwan University, 2011~2017
– Deputy Director, Department of Parasitology, College of Medicine, National Taiwan University, 2013~2014
– Director, Environmental Protection, Occupational Safety and Health Center, College of Medicine, National Taiwan University, 2009~2012
– Associate Director & Director, Office of Research and Development, College of Medicine, National Taiwan University, 2009~2012~2019
– Chief, Biohazard Control Section of Environmental Protection, Occupational Safety and Health Center, National Taiwan University, 2004~2009
– Instructor, Department of Molecular Biology, Princeton University, 1998~2000
– Visiting Research Fellow-Department of Defense of USA, Department of Molecular Biology, Princeton University, 1997~2000
– Teaching Assistant, Molecular Biology 101, Rutgers University, 1992