While at UT, he was a member of the Texas Cowboys service organization.
He then served in the United States Navy as a Lieutenant Commander from 1942 to 1946, working in the Veterans Administration and graduated from the Naval Justice School in 1948.
[1] On June 28, 1966, President Lyndon B. Johnson nominated Singleton to a new seat on the United States District Court for the Southern District of Texas created by 80 Stat.
He was confirmed by the United States Senate on July 22, 1966, and received his commission the same day.
He served as Chief Judge from 1979 to 1988 and assumed senior status on April 1, 1988.