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| 2017.8-Present | Professor, Department of Industrial Engineering, YZU |
| 2011.8-2012.7 | Deputy Dean of Library & Information Services |
| 2004-2017.7 | Associate Professor, Department of Industrial Engineering, Yuan-Ze University,Taiwan, R.O.C. |
| 1997-2004 | Assistant Professor. Dept. of Industrial Engineering and Management, Yuan-Ze University, Taiwan, R.O.C. |
| 1996-1997 | Research Scientist, KBSI, U.S.A. |
| 1991-1995 | Research Assistant, Dept. of Industrial Engineering, TAMU, U.S.A. |