Prof. Soil, Ecosystems, and Critical Zone Science; Duke University

Professor, University of Arizona

Professor of Geological Sciences, INSTAAR, University of Colorado, Boulder

Professor of Forest Soils, The University of Georgia

University Distinguished Professor, Colorado School of Mines

Professor, University of Minnesota, Twin Cities

Associate Professor, Idaho State University

Tianjin University

Lawrence Berkeley National Laboratory

Associate Professor of Environmental Science, Roanoke College