He received has Bachelor of Science in Electrical Engineering with Distinction from Stanford University in 1989. He received his Ph.D in Electrical Engineering from the University of California at Berkeley in 1997. His research interests include mobile and cloud systems, wireless sensor networks, ubiquitous computing, cybersafety, and cyberphysical systems. He has served on the Technical Program Committees of the ACM MobiSys and SenSys conferences, as well as been the General Co-Chair of ACM MobiSys. He is a winner of an NSF CAREER Award, an ACM SIGMOBILE Research Highlights Award, and an IBM Faculty Award, and has served as an Associate Editor of IEEE Transactions on Mobile Computing. He has published ~100 refereed research papers in journals, conferences and workshops, and his research has received ~9800 citations.