Technology and services architect in Business Services organization at AT&T Laboratories, since 1994. Currently working on architecture and service design of MPLS/BGP VPNs, VoPacket, QoS in IP and MPLS networks, MPLS traffic engineering. Prior to joining AT&T worked as a senior software engineer in Network Routing Systems group at IBM. Received a M.S. degree in Computer Science from Technical University of Wroclaw, Poland, and a Ph.D. degree in Computer Science and Engineering from Oregon Graduate Institute, Oregon (1992). Published papers and made presentation in computational logic (e.g., at Logic Colloquium 1999, University of Utrecht, Netherlands, Logic Colloquium 2000, Sorbonne, Paris, France).