He was in 1992 guest artistic director of the Aldeburgh Festival and from 1994–1998 artistic director of Tanglewood Festival of Contemporary Music.
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De Leeuw was artistic advisor for contemporary music with the Sydney Symphony Orchestra and from 2001 to 2010 he served as artistic leader at the Nederlandse Orkest- en Ensemble-Academie (NJO; Dutch Orchestra and Ensemble Academy).
Ton de Leeuw | Reinbert de Leeuw | Paul de Leeuw | Mooi! Weer De Leeuw | Jan de Leeuw | Gerard van der Leeuw | De Leeuw van Vlaanderen (novel) | De Leeuw van Vlaanderen (film) | De Leeuw van Vlaanderen (disambiguation) | De Leeuw van Vlaanderen |
Amongst the musicians and conductors she worked with are: Suzanne Stephens, Reinbert de Leeuw, Stephan Asbury, Jonathan Nott, Riccardo Chailly, Roscoe Mitchell, Michael Riessler, Cuarteto de Cuerdas "José White", Simon Stockhausen and Alain Damiens.