David Claxton received his MD from McGill University in Montreal Canada in 1978 and completed an Internal Medicine Residency in 1983. He then pursued a Hematology Fellowship followed by an Oncology Fellowship, which he completed at the M.D. Anderson Cancer Center in 1990. He was subsequently a faculty member at M.D. Anderson in the Department of Blood and Marrow Transplantation until he left M.D. Anderson in the year 2000 came to Penn State Hershey Cancer Institute. At Penn State, he was promoted to full Professor. His responsibilities at Penn State have included patient care in hematological malignancies and leukemia treatments, blood and marrow transplantation, teaching, research, and administration. Currently, He is actively involved in patient care of patients with blood malignancies. His clinical focus is on leukemia myelodysplastic syndrome and bone marrow transplantation. He teaches medical students, residents, and sub-specialty fellows. He has numerous publications in the field of leukemia molecular biology and therapeutics. He has active clinical research interests in leukemia therapeutics and is also active in translational and bench research and leukemia therapeutics.