Following his graduation from the U.S. Army War College in 1986, he was selected to serve as the Staff Judge Advocate of the United States Military Academy at West Point, New York.

That assignment was followed by another selection as Staff Judge Advocate at Fort Leavenworth, Kansas, with duties that also included legal oversight of the Armed Forces' maximum security prison.

On November 7, 1997, Greene was appointed by President Bill Clinton to a fifteen-year term as a Judge of the United States Court of Appeals for Veterans Claims.

They have two sons: William Robert, who has worked as a manager with Dun and Bradstreet, and Jeffery, who has served as an officer and physician in the United States Army Medical Corps.

Material on this page was adapted from the United States Court of Appeals for Veterans Claims biography of Chief Judge William P. Greene, Jr., a source in the public domain.