Stetter's pioneering work in the use of electronics to measure the energy of nuclear particles earned him the Haitingerpreis (Haitinger Prize) of the ÖAW in 1926.
In 1937, he became Vertreter des Gauvereins Österreich im Vorstand der Deutschen Physikalischen Gesellschaft (Austrian District Association representative of the Board of the German Physical Society).
He was also the Director of the Vereins zur Förderung des physikalischen und chemischen Unterrichts (Association for the Promotion of Teaching Physics and Chemistry).
The Heereswaffenamt (HWA, Army Ordnance Office) soon squeezed out the RFR and started the formal German nuclear energy project under military auspices.
The invitees included Walther Bothe, Siegfried Flügge, Hans Geiger, Otto Hahn, Paul Harteck, Gerhard Hoffmann, Josef Mattauch, and Georg Stetter.
A second meeting was held soon thereafter and included Klaus Clusius, Robert Döpel, Werner Heisenberg, and Carl Friedrich von Weizsäcker.
Circa 1942, Stetter led a group of six physicists and physical chemists in measuring atomic constants and neutron cross sections, as well as investigating transuranic elements.
[13][14][15][16][17] In 1945, during the occupation of Austria by the Allied powers, Stetter was dismissed from his positions at the University of Vienna, because of his membership in the Nationalsozialistische Deutsche Arbeiterpartei (National Socialist Workers Party).
In 1949, he did pioneering work on an optical dust measuring device (optisches Staubmessgerät) for the German Coal Mining Association (deutschen Steinkohlenbergbauverein).
From 1955 to 1957, he was appointed head of the Österreichischen Staub-(und Silikose) Bekämpfungsstelle (Austrian Dust and Silikosis Prevention Agency).
In that same year, the Austrian Academy of Sciences established their Kommission für Reinhaltung der Luft (Commission for Clean Air), and Stetter served as chairman from 1962 to 1985.
The reports were confiscated under the Allied Operation Alsos and sent to the United States Atomic Energy Commission for evaluation.