· Associate Professor, Michigan State University (Current)2004–
· Assistant Professor, Michigan State University1998–2004
· Senior Research Scientist, University of Illinois at Urbana-Champaign1993–1998
· Postdoctoral Fellow, University of Illinois1990–1993
· Postdoctoral Fellow, University of Missouri1988–1990
· Graduate Student, University of Guelph1983–1988
· Ph.D., Honey Bee Biology, University of Guelph1983–1988
· Ph.D., Honey Bee, Biology, University of Guelph1983–1988
· B.Sc, Entomology and Phytopathology, Hunan Agricultural University1977–1981