| Term | Secretary General | Term | Assistant Secretary |
| 1967-1971 | Gavin Arneil | 1967-1971 | Harmen Tiddens |
| 1971-1974 | Harmen Tiddens | 1971-1976 | Andreas Fanconi |
| 1974-1979 | Oskar Oetliker | 1976-1979 | Karel van Acker |
| 1979-1984 | Karel van Acker | 1979-1984 | Ernst Leumann |
| 1984-1989 | Ernst Leumann | 1984-1985 | Karel van Acker |
| 1985-1989 | Michael Winterborn | ||
| 1989-1992 | Michael Winterborn | 1989-1992 | Patrick Niaudet |
| 1992-1997 | Patrick Niaudet | 1992-1997 | Kate Verrier Jones |
| 1997-2000 | Kate Verrier Jones | 1997-2000 | Jochen Ehrich |
| 2000-2003 | Jochen Ehrich | 2000-2003 | Christer Holmberg |
| 2003-2008 | Christer Holmberg | 2003-2008 | Pierre Cochat |
| 2008-2012 | Pierre Cochat | 2008-2010 | Rosanna Coppo |
| 2012-2015 | Rosanna Coppo | 2010-2015 | Elena Levtchenko |
| 2015-2019 | Elena Levtchenko | 2015-2019 | Rezan Topaloglu |
| 2019-2022 | Rezan Topaloglu | 2019-2022 | Dieter Haffner |
| 2022 – | Dieter Haffner | 2022- | Francesco Emma |
| 1967-1970 | Ferdinand Demant | CSSR |
| Renēe Habib | France | |
| 1968-1971 | Nils Svenningsen | Sweden |
| Marian Wojnarowski | Poland | |
| 1969-1972 | Wolgand Hagge | FGR |
| Richard White | UK | |
| 1970-1973 | Peter Grossmann | GDR |
| Pierre Royer | France | |
| 1971-1974 | Gavin Arneil | GB |
| Niilo Hallman | Finland | |
| 1972-1975 | Karel Van Acker | Belgium |
| Mikhail Matveyev | USSR | |
| 1974-1977 | Ian Houston | UK |
| Juan Rodriguez-Soriano | Spain | |
| 1975-1978 | Stewart Cameron | UK |
| Rene Kuijten | The Netherlands | |
| 1976-1979 | Micheline Lēvy | France |
| Johannes Brodehl | FRG | |
| 1977-1980 | Claude Godard | Switzerland |
| Eva Matheova | CSSR | |
| 1978-1981 | Cyril Chantler | UK |
| Juhani Rapola | Finland | |
| 1979-1982 | Claire Kleinknecht | France |
| Karl Schärer | FRG | |
| 1980-1983 | Milana Popovic-Rolovic | Yugoslavia |
| Antonio Torrado | Portugal | |
| 1981-1984 | Willem Proesmans | Belgium |
| Ulf Jodal | Sweden | |
| 1982-1985 | Gianfranco Rizzoni | Italy |
| Michael Winterborn | UK | |
| 1983-1986 | Matthias Brandis | FRG |
| Jiri Svorc | CSSR | |
| 1984-1987 | Chantal Loirat | France |
| Leo Monnens | The Netherlands | |
| 1985-1988 | George Haycock | UK |
| Alberto Martini | Italy | |
| 1986-1989 | Anita Aperia | Sweden |
| Otto Mehls | FRG | |
| 1987-1990 | Patrick Niaudet | France |
| Sandor Turi | Hungary | |
| 1988-1991 | Martin Barratt | UK |
| Rosanna Gurmano | Italy | |
| 1989-1992 | Olli Koskimies | Finland |
| Wolfgang Rascher | Germany | |
| 1990-1993 | Raymond Donckerwolcke | The Netherlands |
| Maria Sieniawska | Poland | |
| 1991-1994 | Alberto Edefonti | Italy |
| Mercedes Vasquez-Martul | Spain | |
| 1992-1995 | Tommy Linne | Sweden |
| Peter Hoyer | Germany | |
| 1993-1996 | Laszlo Kovacs | Czech Republic |
| Jean Pierre Guignard | Switzerland | |
| 1994-1997 | Helena Jardim | Portugal |
| Francesco Perfumo | Italy | |
| 1995-1998 | Christer Holmberg | Finland |
| Jochen Ehrich | Germany | |
| 1996-1999 | Jan Janda | Czech Republic |
| Mario Bianchetti | Switzerland | |
| 1997-2000 | Fernando Santos | Spain |
| Rosanna Coppo | Italy | |
| Pierre Cochat | France | |
| 1998-2001 | Bert van der Heijden | The Netherlands |
| 1999-2002 | Eric Girardin | Switzerland |
| Constantinor Stefanidis | Greece | |
| Aleksandra Zurowska | Poland | |
| 2000-2003 | Michael Fischbach | France |
| Sue Rigden | UK | |
| Hilal Mocan | Turkey | |
| 2001-2004 | Giuliana Lama | Italy |
| 2002-2005 | Mercedes Navarro Torres | Spain |
| Jean-Claude Davin | The Netherlands | |
| György Reusz | Hungary | |
| 2003-2006 | Franz Schaefer | Germany |
| Necla Buyen | Turkey | |
| Alan Watson | UK | |
| 2004-2007 | Francesco Emma | Italy |
| 2005-2008 | Thomas Neuhaus | Switzerland |
| Alfonso Caldas | Portugal | |
| Svetlana Paunova | Russia | |
| Ryszard Grenda | Poland | |
| 2006-2009 | Nicholas Webb | UK |
| A Gur Guven | Turkey | |
| Dieter Haffner | Germany | |
| 2007-2010 | Elena Levtchenko | The Netherlands |
| 2008-2011 | Tatjana Nastausheva | Russia |
| Tim Ulinski | France | |
| Tomas Seeman | Czech Republic | |
| Sverker Hansson | Sweden | |
| Empar Lurbe | Spain | |
| 2009-2012 | Velibor Tasic | Macedonia |
| Rezan Topaloglu | Turkey | |
| 2011-2014 | Johan Vande Walle | Belgium |
| Detlef Böckenhauer | UK | |
| Giovanni Montini | Italy | |
| Marijan Saraga | Croatia | |
| Anna Bjerre | Norway | |
| Eric Girardin | Switzerland | |
| 2012–2015 | Stefanie Weber | Germany |
| Fatoş Yalçınkaya | Turkey | |
| 2014–2017 | Soren Rittig | Denmark |
| Rukshana Shroff | UK | |
| Justine Bacchetta | France | |
| Carmine Pecoraro | Italy | |
| Ali Düzova | Turkey | |
| Helena Pinto | Portugal | |
| 2015–2018 | Larisa Prikhodina | Russia |
| Gema Ariceta | Spain | |
| 2017–2020 | Ana Teixeira | Portugal |
| Jun Oh | Germany | |
| Kjell Tullus | UK | |
| Marina Vivarelli | Italy | |
| Olivia Boyer | France | |
| Sevcan Bakkaloğlu Ezgü | Turkey | |
| 2018-2021 | Augustina Jankauskiene | Lithuania |
| Max Liebau | Germany | |
| Martin Christian | UK | |
| 2020 – 2023 | Aysun Karabay Bayazıt | Turkey |
| Michiel Schreuder | The Netherlands | |
| Dorota Drozdz | Poland | |
| George Reusz | Hungary | |
| Evgenia Preka | UK | |
| 2021-2024 | Stella Stabouli | Greece |
| Fabio Paglialonga | Italy | |
| Jerome Harambat | France |
| 1998-2008 | Peter Hoyer | Germany |
| 2008-2018 | Dieter Haffner | Germany |
| 2018- | Jun Oh | Germany |