After his studies in 1957 he became curator of the Princessehof Ceramics Museum in Leeuwarden. In 1963 he returned to Amsterdam to write his dissertation on Karel van Mander.
After completing his education in 1957, he took up a position as curator at the Princessehof Ceramics Museum in Leeuwarden. Two years later, in 1963, he relocated to Amsterdam to conduct further research and eventually write his thesis on Karel van Mander.