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The year indicates the first year in office.
President
- 2024 Rupert Ridgewell, United Kingdom
- 2021 Pia Shekhter, Sweden
- 2017 Stanislaw Hrabia, Poland
- 2013 Barbara Dobbs Mackenzie, United States
- 2010 Roger Flury, New Zealand
- 2007 Martie Severt, Netherlands
- 2004 Massimo Gentili-Tedeschi, Italy
- 2001 John Roberts, United States
- 1998 Pamela Thompson, United Kingdom
- 1995 Veslemöy Heintz, Sweden
- 1992 Don L. Roberts, United States
- 1989 Catherine Massip, France
- 1986 Maria Calderisi Bryce, Canada
- 1983 Anders Lönn, Sweden
- 1980 Brian Redfern, United Kingdom
- 1977 Barry S. Brook, United States
- 1974 Harald Heckmann, Germany
- 1972 Thor Wood, United States
- 1971 John Davies, United Kingdom
- 1968 Vladimir Fédorov, France
- 1965 André Jurres, Netherlands
- 1962 Vladimir Fédorov, France
- 1959 Folke Lindberg, Sweden
- 1955 Alec (Alexander) Hyatt King, United Kingdom
- 1951 Richard S. Hill, United States
- 1950 Valentin Denis, Belgium
Secretary General
- 2018 Anders Cato, Denmark/Sweden
- 2010 Pia Shekhter, Sweden
- 2003 Roger Flury, New Zealand
- 1995 Alison Hall, Canada
- 1987 Veslemöy Heintz, Sweden
- 1983 Neil Ratliff, United States
- 1974 Anders Lönn, Sweden
- 1959 Harald Heckmann, Germany
- 1955 Frits Noske, Netherlands
- 1951 Vladimir Fédorov, France
Treasurer
- 2022 Kimmy Szeto, USA
- 2013 Thomas Kalk, Germany
- 2007 Kathryn Adamson, United Kingdom
- 1998 Martie Severt, Netherlands
- 1993 Pamela Thompson, United Kingdom
- 1984 Don L. Roberts, United States
- 1959 Wolfgang Rehm, Germany
- 1955 André Jurres, Netherlands
- 1951 Renée Paul-Marie Masson, France