 He took command of USPACOM on May 27, 2015, and retired from Naval service on June 1, 2018.Harris is a 1978 graduate of the United States Naval Academy at Annapolis.He was the U.S. Navy's "Old Goat" – the longest-serving Naval Academy graduate still on active duty – from January 2017 until April 2018, when he passed the title on to his classmate, Admiral Kurt W. Tidd, in a private ceremony at the Pentagon.