Within Android, he is a member of a research team that works on improving positioning accuracy of mobile devices in challenging indoor and urban canyon environments. He received his PhD in Electrical Engineering with focus on "Multisensor based Positioning for Pedestrian Navigation" from the University of Ulm, Germany. Prior to his role at Google, he was a research associate at the Institute of Communication and Navigation at the German Aerospace Center (DLR) where he worked on various research projects related to positioning and navigation. Mohammed has been actively involved in the field of location and context for over 10 years. His research interests are navigation, multi-sensor fusion, mobility models, signal processing and context-aware services.