 He worked for the architect Willrath in Flensburg in 1907 and 1908, and then for the architect Thaysen in Tondern.In 1910, he started studying at the Kunstgewerbeschule (school of arts and crafts) in Düsseldorf, where Wilhelm Kreis was professor at that time.Having graduated in 1913, Munzer planned several buildings in Düsseldorf, and during the First World War he also did planning for industry buildings.