after the national socialists took power in 1933, magill joined the ss and directed the riding instruction of an ss reitersturms. in march 1935 he became a full-time ss leader riding instructor at the ss junker school in braunschweig and made a career there. at the end of 1935 he was promoted to ss-hauptsturmführer and, after he joined the nsdap in 1937 (membership number 4.137.171), to ss-sturmbannführer on april 20, 1938.