- Program Director, National Science Foundation, Geography and Spatial Sciences Program, Behavioral and Cognitive Sciences Division, Social, Behavioral and Economic Sciences Directorate, Arlington, VA, 2010-2013 (rotator); 2016-present (permanent).
- Director of Environmental Programs, Advanced Academic Programs, Krieger School of Arts and Sciences, Johns Hopkins University, Washington DC, 2013-2016. Here I directed three M.Sc. degree programs, Environmental Sciences & Policy, Energy Policy & Climate, and Geographic Information Systems.
- Associate Professor, Michigan State University, Department of Geography, 2006-2013. Core faculty in the Center for Latin American and Caribbean Studies, the Center for Advanced Study of International Development, the Center for Gender in Global Context (GenCen), and the Environmental Science and Policy Program.
- Graduate Program Coordinator, Michigan State University, Department of Geography, 2005-2010.
- Assistant Professor, Michigan State University, Department of Geography, 2000-2006.
- Post-Doctoral Fellow, ITC - International Institute for Aerospace Survey and Earth Sciences (now part of the University of Twente), Enschede, The Netherlands, 1999-July 2000.
- Lecturer, University of Wisconsin-Madison, Department of Geography, Spring 1995 and Fall 1997, Geography 120: Global Physical Environments.
- Consultant, Projeto Várzea/IPAM, Santarém, Pará, Brazil, July 1995-June 1996.