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| 1990-2022.7 | Associate Professor, Dept. of Industrial Engineering & Management, Yuan-Ze University,Taiwan, R.O.C. |
| 1999-2002 | Dean of Student Affairs, Associate Professor, Dept. of Industrial Engineering & Management, Yuan Ze University |
| 1996-1997 | Dean of Student Affairs, Associate Professor, Dept. of Industrial Engineering, Yuan Ze University |
| 1996-1997 | Director of Research Center for Automation & Technology, Associate Professor, Dept. of Industrial Engineering, Yuan Ze Institute of Technol |
| 1992-1996 | Associate Professor, Dept. of Industrial Engineering, Yuan Ze Institute of Technology |
| 1990-1992 | Dean of Student Affairs, Associate Professor, Dept. of Industrial Engineering, Yuan Ze Institute of Technology |
| 1988-1989 | Associate Professor, Dept. of Industrial Engineering, Chung Yuan Christian University |
| 1982-1988 | Teaching & Research Assistant, U. of Iowa |
| 1981-1982 | Industrial Engineer, Office of Production VP, Wei-Chun Food Com. |