Management Team

David J. Mazzo, PhD
President and Chief Executive Officer

Kristen K. Buck, MD
Executive Vice President of R&D and Chief Medical Officer

Gregory S. Berkin
Chief Information Officer and Data Protection Officer

John D. Menditto
Vice President, Investor Relations and Corporate Communications

James Nisco
Senior Vice President, Finance and Treasury and Chief Accounting Officer

William K. Sietsema, PhD
Vice President, Global Regulatory Affairs

Ryan Quick
Vice President, Chemistry, Manufacturing and Controls

Tariq Imam
Senior Vice President, Business Development and Operations and General Counsel