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Executive Biography

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Biography PhotoJohn M. Duffey
President and Chief Executive Officer

John M. Duffey was named President and Chief Executive Officer, and a Director of Six Flags in February 2016. From September 2010 to February 2016, he served as Chief Financial Officer of the company. Mr. Duffey previously served as Executive Vice President and Chief Integration Officer of Siemens Healthcare Diagnostics from November 2007 to January 2010, and was responsible for leading the integration of Siemens Medical Solutions Diagnostics and Dade Behring. Prior to Dade Behring’s acquisition by Siemens AG, from 2001 to November 2007, Mr. Duffey served as the Executive Vice President and Chief Financial Officer of Dade Behring Inc., where he negotiated and led the company through a debt restructuring and entry into the public equity market. Prior to joining Dade Behring, Mr. Duffey was with Price Waterhouse in the Chicago and Detroit practice offices as well as the Washington D.C. National Office. Mr. Duffey holds a B.A. degree in Accounting from Michigan State University.