Nick Maxemchuk received the B.S.E.E. degree from the City College of New York, and the M.S.E.E. and Ph.D. degrees from the University of Pennsylvania. He is currently a professor in the electical engineering department at Columbia University. From 1996 to 2001 he was a technical leader in AT&T laboratories, from 1976 to 1996 he was at AT&T Bell Laboratories, first as a member of the technical staff and then as a department head, and from 1968 to 1976 he was a member of the technical staff at the RCA David Sarnoff Research Center in Princeton, New Jersey.Nick is currently the editor in chief of the IEEE Journal on Selected Areas in Communications, on the steering committee of the IEEE/ACM Transactions on Networking, a member of the NSF experts group for the initiative on integrated sensing, computation, video, and networking, and on the advisory committee for the area of excellence in information technology in Hong Kong. He has been an advisor on data networking to the United Nations, the National Science Foundation, the Rome Air Development Center, the Canadian Institute for Telecommuncations Research, the Information Technology Research Center, the Telecommunications Research Institute of Ontario, and other organizations. He has served as the editor for data communications for the IEEE Transactions on Communications, the editor for networking for the Journal of the ACM, and as a guest editor for the IEEE Journal on Selected Areas in Communications. He has also been on the advisory boards for two start-up companies, Enrichnet and Brightlink.