Keough-Hesburgh Professor of Global Affairs, University of Notre Dame, Keough School of Global Affairs, Notre Dame, IN. September 2020 to present.

Executive Director, Agricultural Innovation Mechanism for Scale (AIM for Scale). January 2025 to present.

Visiting Scholar, School of Global Policy and Strategy, University of California San Diego, San Diego, CA. July 2025 to present.

Associate Dean for Academic Affairs, University of Notre Dame, Keough School of Global Affairs, Notre Dame, IN. January 2023 to June 2025.

Executive Director, Innovation Commission for Climate Change, Food Security and Agriculture, Development Innovation Lab, University of Chicago, Chicago, IL. November 2022 to June 2025.

Associate Vice-President, Strategy and Knowledge Department, International Fund for Agricultural Development (IFAD), Rome, Italy. September 2016 to August 2020.

Director, Research and Impact Assessment Division, International Fund for Agricultural Development (IFAD), Rome, Italy. September 2015 to August 2018.

Professor, American University, Department of Economics, Washington, DC. August 2004 to August 2015 (Associate Professor 2004-2013, tenured 2010).

Technical Consultant, Inter-American Development Bank, Office of Strategic Planning and Development Effectiveness, Washington, DC. October 2008 to August 2015 (sabbatical August 2010-July 2011).

Agricultural and Resource Economist, Inter-American Development Bank, Department for Mexico, Central America, Dominican Republic and Haiti, Environment and Natural Resources Division, Washington, DC. October 2002 to July 2004.

Lecturer, University of New England, Graduate School of Agricultural and Resource Economics & School of Economics, Armidale, Australia. January 1999 to September 2002 (tenured 2001).

Visiting Expert, Food and Agriculture Organization of the United Nations, Economic and Social Division, Rome, Italy. January 2002 to July 2002. (Study leave from the University of New England).

Economist/Rockefeller Foundation Research Fellow, International Potato Center (CIP), Lima, Peru. January 1997 to December 1998.