Professor, Southern Illinois University 2007 to present.
Associate Professor, Southern Illinois University 2004 to 2007.
Assistant Professor, Southern
Illinois
University
, 2001 to 2004.
Associate Professor,
Wichita
State
University
, 1999 to 2001.
Assistant Professor,
Wichita
State
University
, 1995 to 1999.
Hydrologist/Aquatic Biologist (GS 13),
U.S.
Geological Survey, 1992 to 1995.
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