Momenta Pharmaceuticals, Inc. announced the appointment of Santiago Arroyo, M.D., Ph.D. as Chief Medical Officer and Senior Vice President, Development. Dr. Arroyo joins Momenta from Boston Pharmaceuticals, where he was Chief Medical Officer. Previously he was Senior Vice President, Head of Clinical Research and Chief Medical Officer of Biotherapeutics and Pharmatherapeutics at Pfizer Inc. in the areas of Cardiovascular and Metabolism, Pain, Neuroscience, Regenerative Medicine and Rare Diseases. He was previously Therapeutic Area Head for Neurosciences, Discovery Medicine and Clinical Pharmacology at Bristol-Myers Squibb and Neurology Global Therapeutic Area Head for Eisai Global Clinical Development.