Margaret (Peggy) Hamburg is an internationally recognized leader in public health, medicine, and science. She currently is foreign secretary for the National Academy of Medicine and president of the American Association for the Advancement of Science. Dr. Hamburg was the 21st Commissioner of the U.S. Food and Drug Administration, known for advancing regulatory science, modernizing regulatory pathways, and globalization of the agency. Before this, she was founding vice president and senior scientist at the Nuclear Threat Initiative, a foundation dedicated to reducing nuclear, chemical, and biological threats. Other positions have included assistant secretary of health and human services for planning and evaluation, health commissioner for New York City, and assistant director of the National Institute of Allergy and Infectious Disease. Dr. Hamburg now serves on numerous non-profit boards and advisory councils. She is based in Washington, DC.