The administration of Neuengamme was headed by SS-Sturmführer Alfons Bentele (16 September 1942 – 16 March 1943). Alfred Trzebinski (1902 – 1946) was the SS-physician for the Neuengamme subcamps. Most SS officers had direct contact with the prisoners, and their harassment and mistreatment were daily markers of camp routine. In Neuengamme, there were three or four guard forces that would form a Sturmbann to guard the camp and the work details outside the camp. The prisoners’ barracks were surrounded by a barbed wire fence electrically charged at night.