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William Sibold

Current Role(s): Senior Vice President; Head of Multiple Sclerosis

Joined Genzyme: 2011

Bill Sibold is responsible for Genzyme’s Multiple Sclerosis franchise. With a portfolio of two products and promising programs in the pipeline, the franchise is growing rapidly with the goal of becoming the leader in MS. Bill oversees the development of the MS strategy and global commercialization of Genzyme’s MS products, which currently serve patients in more than 50 countries.

Prior experience:

  • Senior Vice President and Chief Commercial Officer, Avanir Pharmaceuticals
  • President and Chief Executive Officer, Lycera Corporation
  • Senior Vice President of U.S. Commercial and various leadership positions for MS products, Biogen Idec


  • M.B.A., Harvard University
  • B.A., Yale University
Last Updated: 4/7/2015