He was on the faculty of the Massachusetts Institute of Technology (1962–1972) and the University of Illinois at Urbana-Champaign (1972–1998), where he was Associate Provost from 1995 to 1998.

He was the William Mong Honorary Chair Professor at National Tsing Hua University.

[1] Since 2007 he was Li Kuo-Ting Forum Professor at National Cheng Kung University.

He also received the IEEE Computer Society, Real Time Systems Technical Committee 1999 Technical Achievement Award (inaugural winner) for his contributions in the area of real time scheduling, and the IEEE Circuits and Systems Society 1998 Technical Achievement Award for his contributions in the area of computer aided design of VLSI circuits.

He also received the Taylor L. Booth Education Award from the IEEE Computer Society in 1992, and the inaugural winner of the Karl V. Karlstrom Education Award from the Association for Computing Machinery in 1989.