Dr. Ernesto Ruiz-Tiben is a world-respected epidemiologist who has been at the helm of The Carter Center’s Guinea Worm Eradication Program for more than three decades. He works in conjunction with the World Health Organization's Collaborating Center for Dracunculiasis Eradication, housed at the U.S. Centers for Disease Control and Prevention (CDC). Prior to joining The Carter Center in 1998, Dr. Ruiz-Tiben spent 27 years at the CDC. There he headed the Helminthic Disease Branch, Division of Parasitic Disease at the National Center for Infectious Diseases. In 1990, the CDC awarded him the U.S. Public Health Service's Outstanding Service Medal in recognition of his contributions to the global initiative to eradicate Guinea worm disease. Dr. Ruiz-Tiben holds a Bachelor of Science from the Catholic University in Puerto Rico, a Master of Science from the University of Puerto Rico and a doctorate in epidemiology from the University of Texas.