Leutnant Biederbick returned 14 victories with JG 54. He returned his first victory, an SB-2 on 23 June, 1941, the second day of Barbarossa. On July 6, 1941 flying ‘white 11’ he collided with ‘white 3’ flown by Uffz. Theodor Steinwendtner during a hard fight with SB-2s of 41 SAD. Both pilots were able to jump clear. Biederbick downed two Soviet aircraft on July 10, 1941; an SB-3 and an I-18 and scored two Soviet P-40s on July 19, 1942.
He moved back to the West in October 1942, posted to IV./JG 1. He served as an instructor from December 1942. He flew as Staffelführer with 2./JG 1 from February to June 1944. His 15th victory was a B-24 (HSS) on April 8, 1944. His 16th was a P-51 five km north-west of Klötze on April 8, 1944. His 17th was a B-17 (HSS) on April 13, 1944, no location. On April 22, 1944 he downed a B-17 west of Rothaargebirge. He moved to JG 101 in July 1944.
In February 1945 he was appointed Staffel kapitän of 5./JG 101 in February 1945 and survived the war credited with 19 victories. He died on January 10, 1996.