In 1982, he joined the faculty of the Department of Electrical Engineering, National Taiwan University, where he is currently a Professor. He is also with the Graduate Institute of Communications Engineering established in 1997. From March 1986 to February 1987, he was a Visiting Scholar at the IBM East Fishkill Facility, NY. From August 1994 to July 1995, he was with the Electrical Engineering Department, University of California at Los Angeles. From May 1998 to April 2000, he was appointed Director of the National Center for High-performance Computing and was responsible for Taiwan's Next Generation Internet project anchored by the National Science Council. Since November 2002, he has been sitting as Director of Planning & Evaluation Division, National Science Council, for the coordination of the national science & technology development. His research areas of interest include computational electromagnetics, transmission line and waveguide discontinuities, microwave and millimeter wave planar circuits, and interconnection modeling for computer packaging.
He is a member of the Phi Tau Phi Scholastic Society, the Chinese Institute of Engineers, the Chinese Institute of Electrical Engineers, the Institute of Electrical and Electronics Engineers (IEEE), and the International Union of Radio Science (URSI). He served as an Associate Editor of the Journal of Chinese Institute of Electrical Engineering in 1996 and has been among the Editorial boards of IEEE Transactions on Microwave Theory and Techniques since 1992. He was bestowed the Youth of Scientific Talent Award by National Culture Renaissance Association in 1975, the Distinguished Research Awards by National Science Council in 1990, '93, '95, and '97, the Outstanding Young Scientist Fellowship by URSI in 1990, the Outstanding Young Engineer Award by Chinese Institute of Engineers in 1992, and the Outstanding Electrical Engineering Professor Award by Chinese Institute of Electrical Engineers in 1999.