Joseph A. "Joe" Sestak, Jr. (born December 12, 1951) is the U.S. Representative for Pennsylvania's 7th congressional district, serving since 2007, and the 2010 Democratic nominee for the United States Senate seat currently held by Arlen Specter.
The district incorporates parts of the Philadelphia suburbs, including most of Delaware County.
A member of the United States Navy for over 30 years, Sestak is a former vice admiral and the highest-ranking former military officer currently serving in Congress. During his career in the Navy, he led a series of operational commands, including commanding the USS George Washington aircraft carrier battle group during combat operations in the Persian Gulf and Indian Ocean in 2002. He served as Director for Defense Policy on the National Security Council under President Bill Clinton and, following the September 11 attacks, was selected to serve as the first Director of "Deep Blue," the Navy's internal think tank to provide strategic advice to the Chief of Naval Operations. He retired from the Navy as a rear admiral.