Dr. John van Doorninck is a pediatric oncologist practicing at the Rocky Mountain Hospital for Children in Denver, Colorado, USA. A native of Denver, he studied medicine at Vanderbilt University in Nashville, Tennessee, and completed his training in pediatric hematology/oncology at Children’s Hospital Los Angeles. There, he served as an Assistant Professor of Pediatrics in the Division of Bone Marrow Transplantation prior to accepting his current position. Dr. van Doorninck’s interest in delivering pediatric cancer care in low and middle-income countries took hold in 2007, when he took inspiration from work being done by members of SIOP’s PODC (International Society of Paediatric Oncology, group for Pediatric Oncology in Developing Countries). His interest further developed through discussions with Professor Tim Eden of World Child Cancer. In 2014, he became formally involved in establishing World Child Cancer’s presence in the United States and in 2017 he joined the Global Project Committee. His wife, Dana Bryson, serves on the Board of Directors of World Child Cancer USA. They have two children.