| Donald C. Stone (United States) |
1974-1982 |
| Sam Scruton Richardson (United Kingdom) |
1982-1986 |
| Wendell Schaeffer (United States) |
1986-1989 |
| Morton Davies (United Kingdom) |
1989-1992 |
| Joan Corkery (Ireland) |
1992-1995 |
| Gabriel William (Malaysia) |
1995-1998 |
| Mohan Kaul (The Commonwealth) |
1998-2001 |
| Allan Rosenbaum (United States) |
2001-2004 |
| Turgay Ergun (Turkey) |
2004-2007 |
| Allan Rosenbaum (United States) |
2007-2010 |