 From 1915 to 1918 he served in the Austro-Hungarian Army and was deployed to the front in the South of the County of Tyrol.After the First World War, in 1919 he gained a doctorate in Vienna and then worked in the Austrian banking system.In March 1938, after the Anschluss of Austria by Germany, Fischböck was appointed economics minister and in May 1938 he was appointed Minister of finance and took measures for the expropriation of Jewish property.