Executive Management Team

• Daniel G. Welch
  Chairman, Chief Executive Officer and President



• Williamson Bradford, M.D., Ph.D.
  Senior Vice President, Clinical Science and Biometrics



• Alan H. Cohen, M.D., FAAP, FCCP, FAAAAI, FCAAI
  Senior Vice President, Medical Affairs



• Giacomo Di Nepi
  Senior Vice President and Managing Director, Europe



• John Hodgman
  Senior Vice President and Chief Financial Officer



• Jonathan A. Leff, M.D.
  Executive Vice President, Research and Development



• Marianne A. Porter, Ph.D.
  Senior Vice President, Chief Regulatory and Drug Safety Officer



• Steven Porter, M.D., Ph.D.
  Chief Medical Officer and Senior Vice President, Clinical Affairs



• Scott Seiwert, Ph.D.
  Senior Vice President, Research and Technical Development



• Robin Steele, Esq.
  Senior Vice President, General Counsel and Corporate Secretary