| Year | Name | Affiliation | Nationality |
| 1976 | Dr Trijntje Hof | TNO | The Netherlands |
| 1976 | Dr Günther Becker | BAM | Germany |
| 1976 | Dr Viktor Butovitsch | Retired | Sweden |
| 1976 | Dr Clement Jacquiot | Lab. de Biologie Végétale | France |
| 1982 | Dr Takeo Shibamoto | Tokyo Univ. of Agriculture | Japan |
| 1983 | Dr Oscar Wälchli | EMPA | Switzerland |
| 1984 | Dr Walter Findlay | Consultant | United Kingdom |
| 1986 | Dr Martin Gersonde | BAM | Germany |
| 1986 | Dr John Levy | Imperial College | United Kingdom |
| 1986 | Mr John Savory | Retired | United Kingdom |
| 1988 | Mr Ronald Cockcroft | IRG Secretariat | Sweden |
| 1990 | Mr Henning Friis-Hansen | Svenska Reimpreg AB Cobra | Sweden |
| 1995 | Mr Carl Bechgaard | Wood - Slimp GmbH | Denmark |
| 1995 | Dr Koichi Nishimoto | Architectural Research Assn | Japan |
| 1999 | Dr Björn Henningsson | Swedish Univ Ag.Scis | Sweden |
| 1999 | Dr Hubert Willeitner | Bund.für Forst- und Holz. | Germany |
| 2002 | Dr Tony Bravery | Bildg Res.Establishment | United Kingdom |
| 2002 | Mr Gérald Ozanne | Ozanne Sci & Services | France |
| 2003 | Dr David Dickinson | Imperial College | United Kingdom |
| 2003 | Dr Harry Greaves | Harry Greaves Consulting | Australia |
| 2005 | Dr Rod Eaton | University of Portsmouth | United Kingdom |
| 2006 | Dr John Ruddick | Univ British Columbia | Canada |
| 2006 | Dr Rolf-Dieter Peek | Bund.für Forst- und Holz. | Germany |
| 2007 | Dr Jerzy Wazny | Warsaw Agricultural Univ | Poland |
| 2007 | Dr Kunio Tsunoda | Kyoto University | Japan |
| 2011 | Dr Michael Hedley | Scion | New Zealand |
| 2014 | Mr Joran Jermer | IRG Secretariat/SP | Sweden |
| 2014 | Dr Alan Preston | FRI/MTU/CSI/Viance | New Zealand |
| 2016 | Dr Jeff Morrell | Oregon State University | USA |
| 2018 | Dr Paul Morris | FPInnovations | Canada |
| 2019 | Dr Peter Hayward | Zelam | New Zealand |
| 2022 | Dr Koichi Yamamoto | FFPRI/JWPA | Japan |
| 2023 | Mr Jack Norton | Queensland Gov't DAF | Australia |
| 2023 | Dr Holger Militz | University of Göttingen | Germany |
| 2025 | Dr Joris Van Acker | Ghent University | Belgium |