John Seffrin retired as CEO of the American Cancer Society in 2014 after 20 years in the position and 40 years overall with the organization. In 2010, he initiated a transformation of the 100-year-old charity that led to a complete restructuring, merging 11 divisions into one central organization that unified virtually all back-office services. He joined the faculty of Indiana University’s School of Public Health as a professor of practice in October 2015 and was a professor of health education and chair of the department from 1979-92 before joining ACS. He serves on the White House Advisory Group on Prevention, Health Promotion, and Integrative and Public Health and formerly served on the Advisory Committee to the Director of U.S. Centers for Disease Control and Prevention. He also helped create the National Center for Tobacco-Free Kids (now called the Campaign for Tobacco-Free Kids), which fights to reduce tobacco use in the U.S. and around the world.