His research interests lie broadly in service computing, reliable distributed systems, Web databases, and semantic integration systems. The focus of the research is on applying service-oriented techniques in these areas to build computer systems that are deployable in practice. He regularly publishes in top journals and conferences, and has authored a book on Trust Management in Service-oriented Environments. He also serves in various capacities on the committees and boards of database and service-oriented computing conferences and journals. He received the PhD degree in Computer Science from Virginia Tech, and is a member of the IEEE and ACM.