1928-59 Dr Walter R Bett

1959-69 Dr D Geraint James

1969-72 Dr John H Cule

1972-74 Dr Neil McIntyre

1974-76 Patricia Allderidge

1976-78 Dr Harvey White

1978-80 William J Dinning

1980-83 Dr Michael D Zatouroff

1983-86 Dr Nicholas A Cambridge

1986-91 David Cooke

1991-93 Dr Gordon C Cook

1993-94 Dr Ian Bailey

1994-99 Dr John Wk Ward

1999-04 Dr David Green

2004-09 Dr Adrian Thomas

2009-11 Dr Daniel Sokol

2011-14 Dr Nicholas Lelos

2014-17 Prof Mark Gardiner

2017- Mr Richard Osborn