Dr. Ellen serves as President, CEO and Physician-in-Chief of Johns Hopkins All Children’s Hospital in St. Petersburg, Florida and Vice Dean and Professor of Pediatrics with Johns Hopkins University School of Medicine. He is a professor of pediatrics at the JHU School of Medicine and a professor of epidemiology and population, family and reproductive health in the Bloomberg School of Public Health. Dr. Ellen has expanded Johns Hopkins All Children’s population health efforts with a focus on structural change to impact asthma, obesity and infant mortality. As a pioneer of this type of approach and a leader of the Adolescent Medicine Trials Network for HIV/AIDS Intervention, he serves as principal investigator for Connect to Protect®, a community coalition-based program. His past research focused on preventing sexually transmitted infections, including HIV, in adolescents and the structural and environmental factors associated with disease transmission. Throughout his career he has received more than $25 million in research awards from the CDC, NIH and other agencies. Dr. Ellen has trained more than 40 pre- and postdoctoral fellows in adolescent medicine and public health and authored more than 200 peer-reviewed scientific articles, reviews and editorial and book chapters.