John Casey(2010 - Present)
Richard Barclay(2002 - 2010)Bill Mason(2000 - 2002)Peter Gomm(1999 - 2000)Peter Wallace(1994 - 1999)John Fairfield(1992 - 1994)Charles Searby(1990 - 1992)Peter Wallace(1987 -1990)Simon Israel(1986 - 1987)David Bonney(1984 -1986)J. Marcus Cooney(1981 - 1984)