Editas Medicine, Inc. announced that its Board of Directors has appointed Dr. Gilmore O'Neill, M.B., M.M.Sc., as President. James C. Mullen will serve as Executive Chairman of the Company's Board of Directors. These changes are effective June 1, 2022.

Dr. O'Neill brings to Editas nearly 20 years of experience in genetic medicine, neurobiology, and clinical development. Dr. O'Neill also has a track record of driving and leading several of biotech's most successful clinical programs and achieving marketing approvals for several medicines, including Amondys®, Vyondys®, Spinraza®, Plegridy®, and Tecfidera®. He most recently served as Executive Vice President of R&D and Chief Medical Officer at Sarepta Therapeutics.

During his tenure at Sarepta, he led the R&D leadership team accountable for creating and driving discovery, preclinical and clinical development, and global regulatory strategy of its RNA and gene therapeutic portfolio. Prior to that, Dr. O'Neill held several leadership roles at Biogen over a 15-year period, most recently serving as Senior Vice President responsible for all late-stage clinical development. During his tenure at Biogen, Dr. O'Neill oversaw development programs for rare disease, gene and cell therapy, neuromuscular disease, pain, multiple sclerosis, acute neurology, movement disorders, and Alzheimer's disease.