Koch   (August 2, 1897 – April 5, 1945), a  Standartenführer  (Colonel) in the German  Schutzstaffel  (SS), was the first commandant of the  Nazi   concentration camps  at  Buchenwald  and  Sachsenhausen , and later also served as a commander at the  Majdanek concentration camp .   Koch served with several  SS-Standarten  until