Astrophysics and Cosmology－theory, Gravitation, High Energy, Particles and Nuclear Physics－theory

1987/9 ~ 1987/12 Postdoctoral Research Associate, Department of Physics & Astronomy, Louisiana State University

1988/1 ~ 1988/6 Postdoctoral Research Associate, Department of Mathematics, Massachusetts Institute of Technology

1988/8~1989/8 Associate Professor, Department of Mathematics, FuJen University

1989/8~1992/8 Associate Professor, Department of Electrophysics, National Chiao Tung University

1992/8~1996/2 Professor, Department of Electrophysics, National Chiao Tung University

1993/8 ~ 1994/9 Visiting, Department of Mathematics, Massachusetts Institute of Technology

1993/8~ Professor, Institute of Physics, National Chiao Tung University

1996/8 ~ 1998/7  Chairman, Institute of Physics, National Chiao Tung University

2012/8 ~ 2014/7  Chairman,  Institute of Physics, National Chiao Tung University