| 2012 – present |
Honorary Investigator, National Health Research Institutes, Zhunan, Taiwan |
| 2012 – present |
Hou Jindui Chair, National Tsing-Hua University College of Life Science, Hsin-Chu, Taiwan |
| 2012 – present |
Distinguished Professor, China Medical University, Taichung, Taiwan |
| 2008 – present |
Distinguished Chair Professor, National Taiwan University College of Medicine, Taipei, Taiwan |
| 2006 – present |
Professor emeritus, University of Texas Health Science Center, Houston, U.S.A. |
| 2006 – 2012 |
Distinguished Investigator and President, Institute of Cellular and System Medicine, National Health Research Institutes, Zhunan, Taiwan |
| 2004 – 2006 |
Professor, University of Texas, M.D. Anderson Cancer Center, Houston, U.S.A. |
| 2001 – 2006 |
Associate Director, Institute of Molecular Medicine, UTHSC, TX, U.S.A. |
| 1998 – 1999 |
Program Director, Frontier in Genomic Medicine Research, National Science Council, Taiwan |
| 1997 – 1999 |
Distinguished Fellow and Director, Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan |
| 1992 – 2006 |
Roy and Phyllis Gough Huffington Chair, UTHSC, TX, U.S.A. |
| 1991 – 1992 |
Visiting Professor, William Harvey Research Institute, London, U.K. |
| 1988 – 2006 |
Director, Vascular Biology Research Center, UTHSC, TX, U.S.A. |
| 1985 – 1991 |
Director, General Clinical Research Center, UTHSC, TX, U.S.A. |
| 1983 – 2006 |
Professor of Medicine and Director, Division of Hematology/ Oncology (1983-1986); Division of Hematology (1986-2006), University of Texas Health Science Center at Houston (UTHSC), TX. |
| 1981 – 1983 |
Professor of Medicine, Rush Medical College, Chicago, IL, U.S.A. |
| 1976 – 1981 |
Associate Professor of Medicine, Rush Medical College, Chicago, IL, U.S.A. |
| 1974 – 1976 |
Assistant Professor of Medicine, University of Iowa, Iowa City, IA, U.S.A. |
