[1] Oxenaar was a student at the Royal Academy of Art, The Hague and graduated in 1953 with honours.
[2] He later was a lecturer at the Royal Academy of Fine Arts in The Hague between 1958 and 1970[2] and taught as Professor of Visual Communication at the Delft University of Technology between 1978 and 1992.
[4] His influence on the next generation of designers was extensive as a commissioner, teacher, and international lecturer, in the Netherlands, Europe, and the US.
Oxenaar was also a prolific designer of acclaimed posters, books, and postage stamps.
[citation needed] Oxenaar's work is preserved in the Nederlands Archief Grafisch Ontwerpers, Utrecht (NAGO).