Professor and Associate Head, University of Georgia, 2004 - 2006 & 2000 - 2002. Professor, University of Georgia, 1999 - Present. Associate Professor, University of Georgia, 1992 - 1998. Visiting Assoc. Professor, Univ. North Carolina at Chapel Hill, Fall 1992. Assistant Professor, University of Georgia, 1987 - 1992. Visiting Assistant Professor, Purdue University, 1986 - 1987.