2017 – 2021  Christina Gitsaki

2014 – 2017  Christina Gitsaki

2011 – 2014  Daniel Perrin

2008 – 2011  Daniel Perrin

2005 – 2008  Karlfried Knapp

2002 – 2005  Karlfried Knapp

1999 – 2002  Andrew Cohen

1996 – 1999  Andrew Cohen

1993 – 1996  David Singleton

1987 – 1993  Marc Spoelders

1984 – 1987  Albert Valdman

1981 – 1984  Jos Nivette

1978 – 1981  Alan Davies

1975 – 1978  Gerhard Nickel

1972 – 1975  Gerhard Nickel

1969 – 1972  Bertil Malmberg

1964 – 1969  Peter Strevens/Max Gorosch