Dr. Cullen is the Marlene and Stewart Greenebaum Distinguished Professor in Oncology and Director of the Program in Oncology at the UMSOM. He also serves as director of the University of Maryland Marlene and Stewart Greenebaum Comprehensive Cancer Center. In 2011, Dr. Cullen was appointed by President Obama to a five-year term as a member of the National Cancer Advisory Board, an advisory committee to the NCI. He previously served as Chairman of the Board of the American Cancer Society and is a recipient of the ACS Excellence in Research Award. Dr. Cullen received his medical degree from Harvard Medical School. He conducted his residency in internal medicine at Beth Israel Hospital in Boston, MA, and fellowship in oncology with the NCI in Bethesda, MD.