IIASA's first Director, Howard Raiffa, and first Council Chair, Jermen Gvishiani were first in a series of distinguished scientists who have held these posts at IIASA.
Council Chairs
Academician Jermen Gvishiani† (Oct. 1972-June 1987)
Academician Vladimir Mikhalevich† (June 1987-May 1992)
Professor Wolf Häfele† and Professor Yoichi Kaya* (June 1992-Nov. 1992)
Academician Gueorgui Golitsyn (Nov. 1992-June 1997)
Professor Kurt Komarek†** (June 1997-Nov. 1998)
Professor Arne Jernelöv (Nov. 1998-Nov. 2000)
Professor Kenji Yamaji*** (Nov. 2000-Nov. 2003)
Professor Simon Levin (Nov. 2003-Dec. 2008)
Professor Peter Lemke (Dec. 2008-Nov. 2014)
Professor Don Saari (Nov. 2014-June 2017)
Academician Alexei Gvishiani*** (June 2017-Sept. 2017)
Professor Michael Clegg (Sept. 2017-Dec. 2023)
Professor Kazuhiko Takemoto (Jan. 2024-present)
* Acting Co-Chair
** Interim Chair
*** Acting Chair
Director Generals
Professor Howard Raiffa† (1972-1975)
Dr. Roger Levien (1975-1981)
Professor C.S. Holling† (Dec. 1981-1984)
Professor Thomas H. Lee† (Sept. 1984-1987)
Dr. Robert H. Pry† (Aug. 1987-1990)
Dr. Peter E. de Jánosi† (Aug. 1990-1996)
Professor Gordon J. MacDonald† (Aug. 1996-2000)
Professor Arne B. Jernelöv* (Sept. 2000-2002)
Professor Dr. Leen Hordijk (July 2002-May 2008)
Professor Sten Nilsson* (May 2008-2009)
Professor Detlof von Winterfeldt (Jan. 2009-Jan. 2012)
Professor Pavel Kabat (Feb. 2012-Sept. 2018)
Professor Nebojsa Nakicenovic* (Sept.-Oct. 2018)
Dr. Albert van Jaarsveld (Oct. 2018-Oct. 2023)
Professor Wolfgang Lutz (Nov. 2023)**
Professor Hans Joachim (John) Schellnhuber (Dec. 2023-present)
* Acting Director
** Acting Director General