Professional Positions – Academic
| Date | School | Position |
| 2005-Present |
 University of California, Irvine |
Donald Bren Professor School of Information & Computer Sciences Department of Computer Science |
| 2002-2004 |
 Georgia Institute of Technology |
Farmer Chair and GRA Eminent Scholar School of Electrical and Computer Engineering College of Computing |
| 1993-2005 |
 University of California, San Diego |
Professor (1993-1999)Professor Emeritus (1999- 2005) |
| 1982-1993 |
 University of Michigan |
Professor |
| 1979-1982 |
 Wayne State University |
Associate Professor |
| 1978 |
 University of Texas, Austin |
Visiting Assistant Professor |
| 1976-1978 |
 University of Hamburg |
Visiting Scientist |
| 1972-1976 |
 Indian Institute of Technology, Kharagpur |
Lecturer |
Professional Positions – Businesses
| Date | Company | About | Location | Position |
| 2005 |  |
Seraja Pvt Ltd | Co-founder and Chairman | |
| 1996-2002 |  |
PRAJA was conceived and cofounded based on research at UCSD. PRAJA inc. was the leading provider of infrastructure software technology for development of event-based information management. | San Diego, CA | Co-Founder 1996President & CEO 1996 – June 2001CTO July 2001- Aug. 2002
|
| 1994-2000 |  |
The Virage platform enables the integration of streaming video with value-added applications such as advertising, pay-per-view, subscription and syndication.Virage became a public company (NASDAQ: VRGE) in June 2000. Virage was later acquired by Autonomy. | San Mateo, CA | Founder, CEO, and Chairman 1994-1996Chairman 1996-1999Director 1999-2000 |
| 1991-1997 |  |
The company is dedicated to linking virtual and physical worlds by providing solutions for surface modeling, reverse engineering, rapid prototyping and inspection. The company is the leader in its space. The company was acquired by SDRC in 1998. Now it is part of Siemens. | Ann Arbor, MI | Founder & Chairman (1991-1995)Director (1995-1997) |