| George S. Axelby |
May 1956 - June 1968 |
| John B. Lewis |
July 1968 - January 1971 |
| Jose B. Cruz, Jr. |
February 1971 - April 1973 |
| Jerry M. Mendel |
May 1973 - February 1975 |
| Stephen Kahne |
March 1975 - December 1978 |
| Michael K. Sain |
January 1979 - May 1983 |
| A. H. Haddad |
June 1983 - December 1988 |
| N. H. McClamroch |
January 1989 - June 1992 |
| John Baillieul |
July 1992 - June 1998 |
| C. G. Cassandras |
July 1998 - December 2009 |
