The IFLA Secretary General is the Chief Executive Officer and heads the IFLA Secretariat, located in The Hague, Netherlands. Core responsibilities of the Secretary General include maintaining the strategic and operational direction and financial management of IFLA, its foundations, and the conference holding companies within the policies determined by the General Assembly and the Governing Board.

Helen Mandl, 2022-2023 (Acting)

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Gerald Leitner, 2016-2022

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​Jennefer Nicholson, 2008-2016

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Peter Lor, 2005-2008

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Rasu Ramachandran, 2004-2005

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Ross Shimmon, 1999-2004

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Leo Voogt, 1992-1998

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Paul Nauta, 1987-1992

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Margreet Wijnstroom, 1971-1987

Anthony Thompson, 1962-1970

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Maria Razumovsky, 1962 (Interim)

Joachim Wieder, 1958-1962

Tietse Pieter Sevensma, 1929-1958

Heinrich Uhlendahl, 1928-1929

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