Dr. Ritz is Executive Director of the Connell-O'Reilly Cell Manipulation Core Facility (CMCF) and a Professor of Medicine at Harvard Medical School. The CMCF provides hematopoietic stem cells for patients who are undergoing hematopoietic stem cell transplantation and manufactured cellular products of various types for patients enrolled on clinical trials evaluating novel cellular therapies for cancer. Dr. Ritz is a member of the Executive Committee of the Dana-Farber/Harvard Cancer Center and the Associate Director for Core Facilities at DF/HCC. He is a Co-Director of the Cancer Vaccine Center at the Dana-Farber Cancer Institute and a member of the Executive Committee of the Harvard Stem Cell Institute. Dr. Ritz's current laboratory research focuses on immune reconstitution after hematopoietic stem cell transplantation, cellular therapies and immunotherapy of cancer.