In 1957 he was one of the founder-members of the Nederlandse Informele Groep (Informelen), with the Dutch painters Kees van Bohemen, Jan Henderikse, Henk Peeters, Jan Schoonhoven and others.
By 1959 he had joined the Situationist International (SI) and attended their Third conference held in Munich April 17 - 20, 1959. With Anton Alberts, Constant and Har Oudejans he wrote First proclamation of the Dutch Section of the SI.
However he was expelled from the SI in the Spring of 1960. However he participate din other Situationist activity, contributing to the Situationist Times.
He has also contributed to Podium , Gard Sivik, De Nieuwe Stijl, Barbarber.