Bachelor of Science summa cum laude, Technion Haifa, 1977. Master of Science, Stanford University, 1981. Doctor of Philosophy, Stanford University, 1985.
Principal engineer Compaq Systems Research Center, Palo Alto, California. Vice president research, chief scientist AltaVista Company, 1999—2002. International Business Machines Corporation distinguished engineer, Chief Technology Officer Institute for Search & Text Analysis International Business Machines Corporation Research, 2002—2005.
Yahoo! fellow, vice president computational advertising Yahoo! Research, since 2005. Instructor Stanford University, 2010.
Fellow: Institute of Electrical and Electronics Engineers (chairman Technology Committee on Mathematics Foundations of Computing), Association Computing Machinery. Member: National Academy Engineering, American Mathematics Society, Society Industrial and Applied Mathematics.