Thiessen (born March 11, 1951 in Goessel, Kansas) is a retired Lieutenant General in the United States Marine Corps, and is the past commander of the United States Marine Corps Forces Pacific, serving from September 2, 2010, until his retirement on August 7, 2012.
Lt.
General Thiessen is currently serving as President and CEO of the National Naval Aviation Museum Foundation located on Naval Air Station Pensacola.