Mahmoud El-Tamer, MD is trained as a breast surgeon with 25 years of experience caring for patients with breast cancer, and works collaboratively with other breast cancer specialists on Memorial Sloan-Kettering Cancer Center’s multidisciplinary breast cancer disease management team. Dr. El-Tamer received his MD from the American University of Beirut in 1981. He completed his residency at the American University of Beirut Medical Center in 1985, followed by four years of surgical oncology and reconstructive surgery at Memorial Sloan-Kettering Cancer Center. After his training, Dr. El-Tamer became interested in joining these two disciplines to provide improved care to breast cancer patients, and has developed a special expertise in this growing field of oncoplastic surgery. Dr. El-Tamer’s research interests have covered different aspects of breast cancer and quality of care in surgery. He has been the principal or co-principal investigator on research grants from the Avon Breast Cancer Foundation, the United States Veterans’ Administration and the American College of Surgeons. His current research interests are focused on tumor micro-environment post mastectomy radiation in 1–3 positive nodes and breast conservation. Dr. El-Tamer has published “Principals & Techniques in Oncoplastic Breast Cancer Surgery”, a textbook to help other surgeons enhance cosmetic results while performing surgery to treat breast cancer. He is currently collaborating with international oncoplastic surgeons to publish a second edition. Dr. El-Tamer holds the patent to a new agent for sentinel node detection.