Johann Georg was a Catholic and loyal to the Emperor's side. From 1603 to 1605, he was president of the
Reichskammergericht and later he was president of the
Aulic Council. The latter post proved helpful when during a military confrontation with Georg Dietrich of Westerstetten, Johann Georg's army had inadvertently strayed into Württemberg territory. He represented Austria at the
Imperial Diet. Together with
Johann Pistorius, the tried, in vain, to persuade margrave
Georg Friedrich of Baden-Durlach to revert to
Catholicism. In 1609, the emperor sent him as a special envoy to the French court. On his return, he met Archduke
Albrecht VII in Brussels. He would correspond with the Archduke ever after. Because of the low pay and several disputes with
Melchior Klesl, he tried to resign three times in 1612 and 1613. The Emperor, however, did not accept his resignation. In 1614, he was again sent on a successful mission to France. In 1620, Emperor
Ferdinand II made Johann Georg a Knight of the
Order of the Golden Fleece and in on 23 March 1623, he was made an
Imperial Prince, together with 22 other
imperial counts, including the counts of
Hohenzollern-Sigmaringen and
Hohenzollern-Haigerloch. With this elevation, Ferdinand attempted to restore the balance between Catholic and Protestant princes. Johann Georg was described as a talented and scientifically formed. In 1623, he added
bastions to his
hohenzollern Castle. ==Marriage and issue==