He attended summer courses in Middelburg given by Morton Feldman and John Cage that were of great importance to his musical development.
His composition Thought for three soloists and orchestra (1990), written for the Residentie Orkest, was premiered during the 1991 Holland Festival by Het Trio (Harry Sparnaay, Harrie Starreveld and René Eckhardt) as soloists, Hans Vonk and Alexandru Lascae conducting.
In this work not only the musicians are placed in two spatially separated groups, but also images and texts are projected into various points in space.
His orchestral work Ventriloquist (1996–1997), dedicated to his former teacher Robert Heppener, was performed for the first time in 1996 by the Nederlands Kamerorkest with Ed Spanjaard conducting, and it was repeated the following year under Lucas Vis at the occasion of a concert to celebrate the fiftieth anniversary of Donemus.
As artistic advisor of the Prime Foundation Groningen he was involved between 1990 and 2002 in organizing festivals around internationally renowned composers such as Morton Feldman (1991), John Cage (1992), Dieter Schnebel (1993), Christian Wolff (1994), Luc Ferrari (1995), Henry Brant (1997), George Crumb (2000) and Wolfgang Rihm (2001).