He received his B.S. from Sonoma State University and his PhD from the University of Washington. His research interests include data integration, peer-to-peer models of data sharing, processing and security of heterogeneous sensor streams, and data exchange between autonomous systems. He is a recipient of the NSF CAREER award and a member of the 2006 (first) DARPA Computer Science Study Panel. He has been a co-program chair for the XML Symposium (2006) and New Trends in Information Integration (2008) workshops.