Rubuta ci gaba don wannan sakin layi - Dulles yana cikin hulɗa da ƙungiyar juriya ta Austriya a kusa da firist Heinrich Maier, wanda ya tattara bayanai ta hanyar sadarwa daban-daban tare da masana kimiyya da sojoji. Daga 1943 zuwa gaba, ya sami bayanai masu mahimmanci daga wannan rukunin juriya game da V-1, rokoki V-2, tankunan Tiger, Messerschmitt Bf 109, Messerschmitt Me 163 Komet da sauran jiragen sama da masana'antun da ke da alaƙa. Saboda haka, jirage masu saukar ungulu na Allied sun sami damar kai wa masana'antun makamai masu muhimmanci hari. Musamman, Dulles a lokacin yana da muhimmiyar bayani ga Operation Crossbow da Operation Hydra
Ka yi haƙuri. Ƙungiyar ta ba shi rahoto game da kisan kiyashi a Auschwitz. Ta hanyar Maier Group da Kurt Grimm, Dulles kuma ya sami bayanai game da yanayin tattalin arziki a cikin tasirin tasirin Nazi. Bayan da Gestapo ta gano kungiyar ta juriya, Dulles ya aika da jami'an Amurka zuwa Austria don tuntuɓar duk wani memba da ya tsira.