A career diplomat in the Hungarian Diplomatic Service from the age of 25, Antal Ullein-Reviczky served in Vienna, Paris, Istanbul, and Zagreb from 1919-1938, when he became head of the Press Department at the Hungarian Ministry of Foreign Affairs until August 1943, obtaining the rank of Minister Plenipotentiary in December 1940. He was the right hand man of Prime Minister Miklos Kallay and enemy of the Nazis. from September 1943 through March 1944 he served as Hungarian Minister in Sweden, and then Representative of 'Free Hungary' until July 1945. He spent the remainder of his life in exile and passed away in London in 1955.