Margaret Mellon is a science policy consultant in the areas of antibiotics, genetic engineering, and sustainable agriculture. She holds a doctorate in molecular biology and a law degree from the University of Virginia. In 1993, Mellon founded the Food and Environment Program at the Union of Concerned Scientists to promote the adoption of science-based farming systems that are simultaneously productive, environmentally benign, and resilient in the face of stress. The program critically evaluated products of genetic engineering for their contribution to sustainable agriculture and urged the reduction of unnecessary antibiotic use in animal agriculture. After almost 20 years, Mellon stepped down as head of the program in 2012 and, after two additional years as a senior scientist, left UCS in 2014. Mellon has published widely on the potential environmental impacts of biotechnology applications and served three terms on the U.S. Department of Agriculture’s Advisory Committee on Biotechnology and 21st Century Agriculture.