SecretaryTreasurer (formertitle)
Professor Samuel J. Record (1931--1938)
School of Forestry, Yale University, New Haven,USA
Dr. Laurence Chalk (1938-1939)
Imperial (Commonwealth) Forestry Institute, University of Oxford, England
Professor Ellwood S. Harrar (1939-1945)
School of Forestry, Duke University, USA
Dr. Laurence Chalk (1945-1946)
Imperial (Commonwealth) Forestry Institute, University of Oxford, England
Professor Harold E.Dadswell (1947-1957)
Division of Forest Products, SouthMelbourne, Australia
A. Frey -Wyssling (1957-1969)
Eidgenössische Technische Hochshule E.T.H., Zürich, Switzerland
Executive Secretary (ES)
Wilfred A. Côté (1970-1976)
College of Forestry,State University of New York, Syracuse, New York,USA.
Pieter Baas (1976-1981)
Rijksherbarium, Schelpenkade 6, Leiden, The Netherlands
Ben J. H. ter Welle (1982-1997)
Institute of Systematic Botany, Heidelberglaan 2, Utrecht, The Netherlands
Regis B. Miller(1997-2011)
US Forest Products Laboratory, Madison, WI, USA
Frederic Lens (2011-2016)
Naturalis-Nationaal Herbarium Nederland, Leiden, The Netherlands
