Like his father, he then studied dentistry at the University of Göttingen and received his doctorate in 1933.

Because of his facilitation of abortion in 1939 he was excluded from the party until he was called to the Heer on 10 June 1940 as he worked as a dentist in Hanover.

In the fall 1943 Schatz graduated from one of the SS-Medizinischen Akademie (Medical Academies) in Graz as a SS-Untersturmführer and was used in the SS-Hauptquartier (Headquarters) in Oranienburg.

From 20 January 1944 until the fall of 1944 he became the second in charge by his superior, SS-KZ Zahnarzt Willi Frank at Auschwitz.

At the end of the war he was captured by the British and subsequently released in January 1946.