2005-present                      Southern Illinois University Edwardsville

              Department of Biological Sciences and Environmental Sciences Program

Edwardsville, IL 62026

Positions: Assistant Professor (2005-2009); Associate Professor (2009-2015); Professor (2015-present)


1999-2005                         Texas Tech University

              The Institute of Environmental and Human Health

Lubbock Texas

Position: Assistant professor, assistant section leader, Aquatic Toxicology Section


1998-1999                               Battelle Memorial Institute

                                                   Battelle Albuquerque Office

                                                   Albuquerque, NM

                                                   Position: Ecological Risk Consultant


1997-1999                               Texas A&M University

                                                   College Station, TX

                                                   Position: Postdoctoral Fellow


1994-1996                               Oak Ridge Associated Universities

                                                   Oak Ridge, TN

                                                   Position: Postdoctoral Fellow


1989-1994                               University of Tennessee

                                                   Knoxville, TN

                                                   Position: Graduate Research Associate


1988-1989                               Ohio State University

                                                   Lima, OH

                                                   Position: Instructor


1988                                          Ohio Environmental Protection Agency

                                                   Columbus, OH

                                                   Position: Field Technician


1984-1988                               Ohio State University

                                                   Columbus, OH

                                                   Position: Graduate Teaching Associate