Director, UF/IFAS Research Center for Food Distribution & Retailing, University of Florida, (2004 to present) University of Florida Research Foundation Professor, Postharvest Physiology and Horticulture, Horticultural Sciences Department, University of Florida (2002-05 and 2008-11) Professor, Postharvest Physiology and Horticulture, Horticultural Sciences Department, University of Florida (1995 to present) Associate Professor, Postharvest Physiology and Horticulture, Horticultural Sciences Department, University of Florida (1989 to 1995) Assistant Professor, Postharvest Physiology and Horticulture, Vegetable Crops Department, University of Florida (1984 to 1989)