[1][2][3] Born in Rotterdam, Van Os studied at the Academie voor Beeldende Kunsten (now Willem de Kooning Academy) from 1958 to 1962.
[1] After graduation, he settled as independent artist in Rotterdam.
From 1994 to 2001 he was lecturer at the ArtEZ Institute of the Arts in Arnhem.
In the 1970s his work became more abstract and he started to visualize shadings.
[4] In the 1970s he started to receive international attention for his work.