Scott Nettles is an Associate Professor in the Electrical and Computer Engineering department at The University of Texas at Austin. He received a Ph.D. in Computer Science from Carnegie Mellon University in 1996, where his worked on high-performance garbage collection and transaction systems. From 1995 to 1999, he was an Assistant Professor of Computer and Information Science at the University of Pennsylvania, where he was the recipient of a 1997 NSF CAREER Award. While at Penn, he was part of the DARPA funded SwitchWare project, which was one of the pioneering groups in the area of Active Networking. His group developed PLAN, the first domain-specific programming language for programmable packets, and PLANet, the first purely active inter-network. Since coming to The University of Texas at Austin in 1999, he has continued his efforts on the design and implementation and application of Active Networks, including developing the first second generation programmable packet language, SNAP. His has several current focuses, including addressing the limitations of Active Packet systems in the area of resource control and applying Active Networking techniques to network security. Finally, his major current focus, is applying new architectural approaches (especially Active Networking) to the emerging area of mobile/wireless networks.