ケルンテン公国
Like all his ancestors, Ferdinand Joseph was in the service of the House of Habsburg. He received the court offices ("Hofamt") of "Oberst-Erblandmundschenk" in the Duchy of Carinthia and hereditary "land-Jägermeister" in the Duchy of Styria and later was appointed "Kämmerer" of Emperor Leopold I and member of the Privy Council.