He received his Ph.D. degree in computer science from University of Maryland, USA in 2004 and a B.Sc. and M.Sc. in computer science from Alexandria University, Egypt in 1997 and 1999 respectively. His research interests include mobile wireless networks, mobile computing, location determination technologies, pervasive computing, and network security. He has ten issued and pending patents. He is an associate editor for the ACM TSAS, an area editor of the ACM MC2R and served on the organizing and technical committees of numerous conferences. Dr. Youssef is the recipient of the 2003 University of Maryland Invention of the Year award, the 2010 joint TWAS-AAS-Microsoft Award for Young Scientists, the 2012 Egyptian State Award, the 2014 COMESA Innovation Award, among others. He is also an ACM Distinguished Speaker.