Dr. Harrison is a clinical researcher and nationally and internationally recognized expert in bone and soft tissue sarcomas, with a focus on clinical trial design for patients with rhabdomyosarcoma. Dr. Harrison graduated from medical school in 2000 from UMDNJ - Newark campus and completed his pediatric residency at New York Columbia Presbyterian - Babies and Children's Hospital of New York in 2003. Dr. Harrison then pursued fellowship at Memorial Sloan Kettering Cancer Center in New York City where he served as Chief Fellow, completing fellowship in 2007. From 2007-2014, he was a faculty member at the Warren Alpert Medical School of Brown University where he led the programs in pediatric neuro-oncology and pediatric solid tumors and served as the Children’s Oncology Group P.I. Dr. Harrison then moved to Houston, Texas where he served as the Center Medical Director of the Children's Hospital of MD Anderson Cancer Center. At MD Anderson, he chaired the Pediatric Sarcoma and Solid Tumor Teams in the Division of Pediatrics where he served in a leadership capacity of the clinical research infrastructure of the division and played an active role in the design and implementation of multiple phase I and phase II clinical trials in pediatric sarcomas and solid tumors. Dr. Harrison is an invited member of the Children’s Oncology Group (COG) Soft Tissue Sarcoma Steering Committee and the Adolescent and Young Adult Steering Committee and due to his work with the COG, was recently asked to join the COG Hematology Oncology Steering Committee along with the Young Investigator Mentoring and Membership Committees. Dr. Harrison has served as Study Chair of two national multi-institutional COG studies in refractory soft tissue sarcomas - ADVL2021 A and B, the high risk rhabdomyosarcoma study - ARST08P1, and as Vice-Chair of the phase 3 intermediate risk rhabdomyosarcoma clinical study - ARST1431. Dr. Harrison has had extensive training and coursework in clinical trial design, having completed a Masters in Clinical Science from Weill Cornell Medical Center in New York City in the summer of 2016. In 2025, Dr. Harrison joined the faculty at Nemours Children's Hospital as Division Chief of Pediatric Hematology and Oncology and the Director of The Lisa Dean Moseley Foundation Institute for Cancer and Blood Disorders.