Mark Ryckman
 Mark L. Ryckman (born February 18 1970) is the City Manager of the City of Corning New York a municipal corporation founded in 1890. The City of Corning is home to the world headquarters of Corning Incorporated a Fortune 500 company.In July 1997 Ryckman's appointment as City Manager was approved by the Corning City Council. As the City's Chief Executive Officer he is responsible for all daily operations and providing the legislative body with policy advice on a variety of issues.