|
| 2013-Present | Professor, Department of Industrial Engineering and Management, Yuan Ze University. |
| 2006-2013 | Associate Professor, Department of Industrial Engineering, Yuan-Ze University,Taiwan, R.O.C. |
| 1999-2006 | Assistant Professor, Department of Industrial Engineering and Management, Yuan Ze University. |
| 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. |