 Thurman Horney1968 – 1970 |
 Charles B. McIntyre1970 – 1994 |
 Dr. Hartwell Fuller1994 – 2004 |
 Dr. Deborah L. Lamm2004 – 2018 |
| Thurman Horney 1968 – 1970 |
| Charles B. McIntyre 1970 – 1994 |
| Dr. Hartwell Fuller 1994 – 2004 |
| Dr. Deborah L. Lamm 2004 – 2018 |