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| 2013-Present | 元智大學工業工程系教授 |
| 2006-2013 | 元智大學工業工程與管理學系副教授 |
| 1999-2006 | 元智大學工業工程系助理教授 |
| 1998-1999 | Assistant Research Scientist, Department of Civil and Environmental Engineering, University of Maryland. |
| 1993-1997 | Research Assistant, Department of Civil and Environmental Engineering, University of Maryland. |
| 1991-1992 | Research Assistant, Transportation Center, Northwestern University. |