On June 7, 2017, Mustang Bio Inc. announced that Michael J. Zelefsky, M.D., 57, has been appointed to the company's Board of Directors. Dr. Zelefsky has not yet been appointed to any committees of the company's Board of Directors. Dr. Zelefsky has served as a Member at Memorial Sloan-Kettering Cancer Center Department of Radiation Oncology since 2005. He has served as Chief of Memorial Sloan-Kettering's Brachytherapy Service since 2000, and has been a Professor of Radiation Oncology at Weill Cornell Medical College, Cornell University since 1994.