2007–Pr. Professor, Department of Earth, Atmospheric and Geographic Information Sciences, Western Illinois University

2002–07. Associate Professor, Department of Geography, Western Illinois University

1998–02. Assistant Professor, Department of Geography, Western Illinois University

1995–98. Assistant Professor, Department of Social Sciences, Northwestern State University

1994–95. Adjunct Instructor, Department of Geography, University of Denver

2015-Pr. Faculty Associate, Western Illinois University GIS Center

2013–18. Faculty Associate for Research, Center for Innovation in Teaching and Research, Western Illinois University

2002-04. Faculty Associate, Teaching Learning and Technology Center, Western Illinois University College of Arts and Sciences

2002–07. Chairperson, Department of Geography, Western Illinois University

1999–02. Graduate Program Coordinator, Department of Geography, Western Illinois University

1998–99. Environmental Studies Minor Advisor, Western Illinois University

1995–98. Geography Program Coordinator, Department of Social Sciences, Northwestern State University

1995. Boettcher Foundation Graduate Fellowship, College of Natural Sciences, Math, and Engineering, University of Denver

1992–94. Associated Western Universities Student Research Fellow, United States Department of Energy—Denver Support Office

1991–94. Graduate Teaching Assistant, Department of Geography, University of Denver

1991. Intern, Planning and Development District III, Yankton, South Dakota

1989–90. Graduate Assistant, Department of Geography, Western Illinois University