Kammala wannan jumla: Fettich ya gama makarantar sakandare a Szombathely da Budapest. A shekara ta 1921, ya kammala karatunsa daga Jami'ar Eötvös Loránd a Budapest a matsayin digiri na biyu a fannin zane-zane, tare da takaddama game da allunan alƙawari a lardin Pannonia na Roman. Daga 1921 zuwa 1923, ya kasance dalibi na sashen sarewa na Franz Liszt Academy of Music. Ya, a cikin 1926, ya yi aiki a Gidan Tarihi na Ƙasar Hungary don Numismatic da tarin kayan tarihi na cajin Lokacin Hijira. Da yake ya koyi Rasha, an tura shi a matsayin daya daga cikin masu binciken ilimin kimiyyar kimiyyar Soviet daga 1929 zuwa 1935. Shi ne editan da ya kafa Folia Archaeology a 1939. A 1941, an nada shi a matsayin darektan Gidan Tarihi na Kasa na Hungary. A shekara ta 1941, ya zama mai aikin zinariya. Ya yi zane-zane da yawa game da tarihin tarihi. Bayan ya yi ritaya a shekarar 1945, ya zama ma'aikacin jiki, amma har yanzu yana aiki a matsayin mai zinare. A cikin 1956, shi ne marubucin takardun kimiyya da yawa. Daga 1957 har zuwa mutuwarsa, ya kasance memba na Creative Union of Goldsmith Artists. A 1957, ya shiga cikin
Expo 58 a birnin Brussels. Daga 1959 zuwa 1962, ya kasance memba na Kwalejin Kimiyya ta Hungary a matsayin ma'aikacin kwangila na Archaeological Research Group. An ba shi lambar yabo ta Archaeology da Tarihin Zane-zane na Hungary na Kungiyar Kimiyya kuma ya kasance memba na Kamfanin Helsinki Finno-Ugric. Fettich ya halarci wasu ayyukan tono kayan tarihi.