On the recommendation of Franz Seiwert, he was employed by the Gesellschafts- und Wirtschaftsmuseum, working with Gerd Arntz and Augustin Tschinkel on developing isotypes.

He travelled to Moscow with Arntz and Otto Neurath to work at IZOSTAT to help them draw up pictorial images for statistics of the Five Year Plans.

[3] A 1939 mural celebrating rail transportation covers the interior wall of one Amsterdam Amstel railway station.

A signed, undated mural of six men with machinery and tools stands in the stairwell of Stadhouderskade 68, Amsterdam (currently Hotel Aston City).

The figures bear a range of skin tones, from brown to buff, indicating interracial inclusion.