General der Nachrichtentruppe Erich Fellgiebel, was Director of the Code and Cipher section of the Defense Ministry from 1931 to 1932 and held the dual combined office of Chef HNW and Chief Signal Officer Armed Forces (Chef WNF) from 1939 until 20 July 1944. Fellgiebel was executed in July 1944 after an attempt on Hitler's life in the failed 20th July plot.