Susan M. O’Brien, M.D., is a professor in the department of leukemia and clinical consultant and special assistant to the physician-in-chief at MD Anderson Cancer Center. Dr. O’Brien received her medical degree from the University of Medicine and Dentistry of New Jersey in Newark. She went on to complete a residency in internal medicine at the University of Medicine and Dentistry of New Jersey. She served there as an instructor in medicine before moving to California, where she served as an instructor in the San Fernando Valley Program in the University of California, Los Angeles School of Medicine and an internist in the University of Southern California Student Health Service. During her time at MD Anderson, Dr. O’Brien has been the principal investigator or a co-principal investigator for 5 funded research projects and the primary investigator for more than 20 funded protocols. In addition, she has served on the Translational Research Study Section for the Leukemia and Lymphoma Society since 2001.