Von Alvensleben became a member of the German Reichstag in 1933; on April 5 1934, he became commander of the 46th SS-standard in Dresden. Later on, von Alvensleben was made first adjutant of the Reichsführer SS, as well as chief of the German police; his career continued with appointments to commander of the SS and police in Crimea and commander of the Selbstschutz (self-defense) of the Reichsgau Danzig-West Prussia.
After the war, he fled to Argentina, never being brought into account for his role in murdering Poles in West Prussia.