Positions Held:
July 2012 – Present: Professor, Department of Biology, University of Oklahoma (OU)
July 2005 – June 2012: Professor, Department of Zoology, OU; Director, The University of Oklahoma Biological Station (UOBS).
January 1999 – June 2005: Associate Professor, OU Department of Zoology; Director, UOBS.
September 1990 – December 1998: Associate Research Scientist (tenured), Max-Planck-Institut (MPI) für Limnologie, Plön, Germany.
September 1988 – August 1990: Assistant Professor (limited-term), Department of Biological Sciences, Great Lakes Institute, University of Windsor, Windsor, Ontario, Canada.
June 1987 – August 1988: Postdoctoral Fellow, MPI für Limnologie, Plön.
June 1984 – June 1987: Postdoctoral Fellow, Department of Biological Sciences, University of Windsor, Ontario, Canada.
January – May 1984: Graduate Research Assistant, University of Illinois at Urbana-Champaign (UIUC).
October – December 1983: Research Fellow, MPI für Limnologie.
January – October 1983: Graduate Research Assistant, UIUC.
October – December 1982: Research Fellow, MPI für Limnologie.
August 1981 – December 1981; Visiting Lecturer, UIUC.
January 1980 – October 1982: Graduate Research Assistant, UIUC.
August 1978 – December 1979: Graduate Teaching Assistant, UIUC.
