2004-2009 Chair, Department of Bioengineering, University of California, Berkeley
2003-present Professor, Bioengineering and Mechanical Engineering, University of California, Berkeley
1998-2003 Associate Professor, Bioengineering and Mechanical Engineering, University of California, Berkeley
1998 Director, Berkeley Sensor and Actuator Center, University of California, Berkeley
1997 Co-Chair, Joint UCSF/UCB Bioengineering Graduate Group
1996-present Faculty Member, Applied Science & Technology Graduate Group
1992-1998 Assistant Professor, Mechanical Engineering, University of California, Berkeley
1986-1992 Research Engineer, Institute for Non-Linear Science, University of California, San Diego
1984-1992 Research Scientist, Science Applications International Corporation, Technology Research Group, San Diego, CA
1983-1984 Technical Staff, Jet Propulsion Laboratory, Pasadena, CA