Thompson Chair of Invertebrate Paleontology, Florida Museum of Natural History, U. Florida

Professor of Geosciences, Penn State

University of Vienna

Curator, Museo di Storia Naturale, Università di Firenze

Department of Earth Sciences, Utrecht University

University of Wyoming Geological Museum

University of California, Los Angeles

NSF postdoctoral fellow, University of California Davis

PhD Candidate, North Dakota State University

PhD candidate, Utrecht University