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John Callender worked as a Senior program integrity specialist at DHHS/CMS from January 1976 to June 1980. John then retired as a Senior Vice President at The Ohio Hospital Association in October 2010.

John Callender attended St. Joseph Public Highschool from 1963 to 1966. Following their high school education, they pursued a Bachelor of Arts degree in Communication Arts and Economics at Michigan State University from 1966 to 1970.