He is currently a professor and the ECE Department chair at the University of Idaho. Previously, he served as the associate vice president of Graduate Studies, Qatar University, chair of the Computer Science Department, Western Michigan University, chair of the Computer Science Department, University of West Florida. He also served in academic positions at the University of Missouri-Kansas City, University of Colorado-Boulder, Syracuse University and Kuwait University. His research interests include wireless communications and mobile computing, computer networks, mobile cloud computing, security and smart grid. He currently serves on the editorial boards of several international technical journals and the founder and the editor-in-chief of Wireless Communications and Mobile Computing journal (Wiley). He is the author of nine books and more than 400 publications in refereed journals and conferences. He guest edited a number of special issues in IEEE journals and magazines. He also served as a member, chair and the general chair of a number of international conferences. He was selected as the Best Teaching Assistant for two consecutive years at Syracuse University. He received the Best Research Award from three institutions. He was the chair of the IEEE Communications Society Wireless Technical Committee and the chair of the TAOS Technical Committee. He served as the IEEE Computer Society Distinguished Speaker from 2003 to 2005