David L. Gunn is a transportation system administrator who has headed several significant railroads and transit systems in North America. He was director of operations of the Massachusetts Bay Transportation Authority (MBTA) from 1975 to 1979, general manager and chief operations officer of the Southeastern Pennsylvania Transportation Authority (SEPTA) from 1979 to 1984, president of the New York City Transit Authority from 1984 to 1990, the general manager at WMATA from 1991 to 1994, and chief general manager of the Toronto Transit Commission in Canada from 1995 to 1999. Gunn assumed the presidency of Amtrak on May 15, 2002, and held the position until political upheaval at the company in 2005. A dual citizen of the U.S. and Canada, Gunn retired to his family home on Cape Breton Island in Nova Scotia, Canada. He is currently associated with the Free Congress Foundation and the board of the Strait Area Transit Cooperative transit service in rural Richmond County, among other roles.

The Southeastern Pennsylvania Transportation Authority (SEPTA) is a regional public transportation authority that operates bus, rapid transit, commuter rail, light rail, and electric trolleybus services for nearly four million people in five counties in and around Philadelphia, Pennsylvania. It also manages projects that maintain, replace and expand its infrastructure, facilities and vehicles.