Career
In 1992 he was elected as city manager (gemeentesecretaris) of Budel. After the municipal reorganization of North Brabant on January 1, 1997, Budel was incorporated along with the municipality Maarheeze in the new municipality Cranendonck, and Postma was made city manager. In April 1998 Postma was appointed mayor of the northern Dutch town of Beemster.
During his mayoral term, he died suddenly of cardiac arrest in September 2002.
He was succeeded in his position by Harry Brinkman.
