"Principal Research Scientist - Illinois State Geological Survey/Prairie Research Institute"

California State University, Northridge

University of Colorado at Boulder

University of Wisconsin - Madison

University of Illinois at Urbana-Champaign

Dartmouth College

Pensacola State College

University Of Georgia

Tarleton State University

Northern Kentucky University

Santa Barbara City College

George Mason University

Harper College

Mississippi State University

Ventura County Community College District

University of North Carolina Wilmington

Shenandoah University

University of Missouri - Kansas City

Rice University

University of Oregon

Metro State University of Minnesota