Leo Mascarenhas, MD, MS is the Deputy Director of the Cancer & Blood Disease Institute, & Section Head of Oncology within the Division of Hematology/Oncology at Children’s Hospital Los Angeles (CHLA). He is also the Director of the Sarcoma & Solid Tumor Program, the Director of the Early Phase Clinical Trials Program, & the Principal Investigator for the Children’s Oncology Group (COG) at CHLA. He serves as the Chairman of the Voting Body of COG & a member of the Bone Sarcoma & Soft Tissue Sarcoma Steering Committees. Dr. Mascarenhas is an Associate Professor of Pediatrics at the Keck School of Medicine, University of Southern California. Dr. Mascarenhas is an internationally recognized expert in pediatric sarcomas & solid tumors. His research focus is on clinical trials for sarcomas in pediatrics, adolescents, & young adults, as well as developmental therapeutics for pediatric solid tumors.