· Director, International Computer Science Institute (ICSI)2024–
· Research Scientist, Google2014–2023
· Affiliate Professor, University of Washington2014–
· Senior Research Scientist, Microsoft Research2012–2014
· Senior Research Scientist, Yahoo! Research2005–2012
· Research Staff Member, IBM Research - Almaden2000–2005
· Member of the Research Staff, Interval Research1994–2000
· Senior Research Scientist, Apple Computer1988–1994
· Adjunct Professor / Consulting Professor, CCRMA, Stanford University1988–
· Member of the Research Staff, Schlumberger Palo Alto Research1985–1988
· Intern, Bell Laboratories1978–1980
· M.S.E.E., Electrical Engineering, Purdue University1977–1981
· Ph.D., Electrical Engineering, Purdue University1977–1985