 From 1929 on he worked as a teacher, at first in Salzburg, from 1931 to 1933 in Ried im Innkreis and from 1933 on in St. Pölten.In 1944 Petsche was an officer of the Wehrmacht in the city of Novi Sad where he was accommodated by the Jewish family Csarneyi.The Jewish attorney Dr. Tibor, his wife Vera and their five-year-old twin daughters also lived in the same house.