Dean of the Hajim School of Engineering and Applied Sciences at the University of Rochester since 2008. Dean of the Pratt School of Engineering from 2007-2008. Senior Associate Dean at Duke University from 2002 to 2007. Chair of the Mechanical Engineering and Materials Science Department in 2007. Assistant Professor, Duke University 1992 to 2002. Vice President and Senior Research Scientist at Adaptive Technologies 1993 to 1996.