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
Valeria Termini (Italy) 2010-2012