John F. Clark is an American law enforcement official and non-profit executive who served as the director of the United States Marshals Service, appointed to the position by president George W. Bush on March 17, 2006 and succeeded by Stacia Hylton in 2010.

[1] On January 3, 2010, Clark joined Lockheed Martin as director of security operations for information systems and global solutions.

[2] Clark began his career with the United States Marshals Service in the San Francisco and San Jose offices of the United States District Court for the Northern District of California.

On January 3, 2010, Clark joined Lockheed Martin as their director of security operations for information systems and global solutions.

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