John Krumm graduated from Carnegie Mellon University in 1993 with a PhD in robotics and a thesis on texture analysis in images. He worked at the Robotics Center of Sandia National Laboratories in Albuquerque, New Mexico for the next four years. His main projects there were computer vision for object recognition for robots and occupant detection for cars. Since 1997 he has been a researcher at Microsoft Research in Redmond, Washington, USA concentrating on location tracking of people and devices and on ways of using location data to benefit the user. He holds 28 U.S. patents and serves on the editorial boards of IEEE Pervasive Magazine and the Journal of Location Based Services. He recently served as a PC chair for the 9th International Conference on Ubiquitous Computing (UbiComp 2007).