Injuries sustained in a midair collision on 17 January 1943 grounded him from further combat flying. He surrendered command of JG 51 on 1 April 1944 and was appointed Jagdfliegerführer Ostpreussen (fighter leader Eastern Prussia). Nordmann then served further fighter command positions with Jagdabschnittsführer 6 (leader of the 6th fighter sector) and the 1st Fighter Division, a position he held until the end of World War II.