Adjunct Associate Professor of Public Affairs at SIPA since 2013; Lamont Associate Research Professor at LDEO since 2009, Assistant Professor of Earth Sciences and Chemistry at Dartmouth College prior to 2009. Representative to National User Facility Organization (NUFO) for Synchrotron-Related Research since 2012. His research and consulting interests include Soil and Aqueous Geochemistry, Mineralogy, Tropical Soils and Soil Fertility, Environmental Health, and Environmental Remediation.