Senior Lecturer Geological Sciences, University of Florida

Temple University

Professor of Geology, Dept. of Earth Sciences, Montana State University

Professor, School of Geosciences, University of South Florida

Texas A&M University

Professor of Science Education and Gifted Education, University of Northern Iowa

Professor, School of Earth & Space Exploration, Arizona State University

University of Texas at Arlington

Professor of Geophysics and Planetarium Director, Old Dominion University

University of Northern Colorado