He received his Ph.D. in computer science in 1999 from Washington University in St. Louis, MO. In 2002, he received an NSF CAREER award to explore router services as a component of the next generation internet architecture. His current interests include future network architectures, security and measurements, and he is involved in several projects funded by DHS and NSF. He is a senior IEEE member and has served on numerous ACM and IEEE conference program committees.