From 1923 to 1925, he was editor of the Auslandpost, the literary supplement of the Allgemeine Zeitung and the weekly radio Süddeutscher Rundfunk.
Schoenberner became an associate of Thomas Theodor Heine and from November 1929 to March 1933, the last editor of Simplicissimus, before Hitler's seizure of power.
Schoenberner and his wife, novelist Ellie Nerac, followed Heine on 20 March 1933 to exile in Switzerland and then to France where he lived in Roquebrune-Cap-Martin on the French Riviera.
During this time he published articles in Klaus Mann's exile magazine Die Sammlung and the social democratic Zurcher Zeitung.
[1] In 1951, he fell down a flight of stairs after an assault, and spent rest of his life in a wheelchair paralyzed from the waist down.