Operation Reinhard
After the termination of Operation Reinhard and the closure of Belzec in June 1943, Hering remained the commander of the Poniatowa concentration camp reassigned as subcamp of Majdanek from the forced labor camp supporting the German war effort. On 3–4 November 1943, German police killed the remaining Jews at Poniatowa during Aktion Erntefest (). Hering then joined fellow SS men from the Operation Reinhard staff in Trieste, Italy. On 9 October 1945, Hering died of mysterious complications in the waiting room of St. Catherine's Hospital in Stetten im Remstal.