Complex sentence: In December, 1943 Bischoff was reassigned to the SS-Main Economic and Administrative Office in Berlin, joining the staff of SS-Obergruppenführer Hans Kammler, as the chief of counter-intelligence and counter-sabotage for Germany's V-weapons program.
Split into simpler sentences: In December, 1943 Bischoff was reassigned to the SS-Main Economic and Administrative Office. He joined the staff of SS-Obergruppenführer Hans Kammler, as the chief of counter-intelligence and counter-sabotage for Germany's V-weapons program.