He is a Belgian artist. He has lived and worked in France since 1951. His work is related to Tachisme, Abstract expressionism, and Lyrical Abstraction.
He worked with Walasse Ting and continued to be close to Christian Dotremont. He also developed links with André Breton.
His international career continued throughout the seventies and by 1983 he became Professor of painting at the École nationale supérieure des Beaux-Arts, Paris. In 1994 he was awarded an honorary doctorate by the Free University of Brussels, and in 1995 one of his designs was used on a Belgian stamp.
His works are held in the collections of the Royal Museums of Fine Arts of Belgium, the Tate, Museum Ludwig in Cologne, the New York Museum of Modern Art, the Walker Art Center in Minneapolis, and the Museum of Art Fort Lauderdale, Nova Southeastern University in Fort Lauderdale, Florida.