Professor, Medical Sciences Program, School of Medicine, Indiana University Bloomington
Fellow, Indiana Molecular Biology Institute, College of Arts and Sciences, Indiana University Bloomington
Associate Professor, Department of Biology, College of Arts and Sciences, Indiana University Bloomington
Program Director, IBN/Integrative Plant Biology
1998 - 1999
Associate Professor, Ohio State University
1992 - 1995
Assistant Professor, Ohio State University
1986 - 1992
Research Associate, Michigan State University
1981 - 1983
Research Associate, University of Illinois at Chicago
1983 - 1986