| Michael D. McKinney |
November 2006-Present |
| Robert McTeer |
November 2004-November 2006 |
| Howard D. Graves |
August 1999-August 2003 |
| Barry B. Thompson |
September 1994-August 1999 |
| William H. Mobley |
September 1993-August 1994 |
| Herbert H. Richardson |
September 1991-August 1993 |
| Perry L. Adkisson |
June 1986-December 1990 |
| Arthur Hansen |
July 1982-June 1986 |
| Frank W.R. Hubert |
October 1979-June 1982 |
| Jack Kenny Williams |
September 1970-January 1979 |
| James Earl Rudder |
August 1965-March 1970 |
| Marion Thomas Harrington |
September 1953-August 1965 |
| Gibb Gilchrist |
September 1948-August 1953 |
