Abromeit joined the Nazi Party (member number 329,305) and the SS (member number 272,353). In 1937 he became an SS-Untersturmführer, in 1938 SS-Obersturmführer and in 1940 SS-Hauptsturmführer. From 1939 to 1941 he served as head of the SD-Special Section for the Evacuation of Poles and Jews that forced resettlement from Danzig and West Prussia.