Wim de Ruiter (Heemstede, The Netherlands, 1943) studied organ with Piet Kee and thereafter composition with Ton de Leeuw.

From 1973 until 1995 he was a teacher at the Conservatory of Amsterdam. He taught theory of 20th century music, and later also composition of electronic music. As from 1985 he was in charge of the electronic studio.
He also taught for four years theory of 20th century music at the conservatory of Zwolle, where, in 1995, he became visiting lecturer for electronic music.
Today he is active as a  composer and as a member on various boards, including those of the International Organ Festival Haarlem and the Federation of Artist Associations. He was amongst others chairman of the Association of Dutch Composers and of the Donemus Foundation, the publisher of Dutch contemporary music. Together with others he established the Foundation Conlon, pursuing the promotion of music in which acoustical instruments are electronically controlled.
Also Wim de Ruiter is the author of Compositietechnieken in de twintigste eeuw (Composition techniques in the twentieth century), a book describing musical developments in the twentieth century.
Wim de Ruiter has been a member of various boards, including those of the International Organ Festival Haarlem, the Association of Dutch Composers and the Donemus Foundation, the publisher of Dutch contemporary music, today part of the Music Center Netherland.