His work as a concert pianist took him to several large cities in Germany, especially to Dresden, where Immisch settled in the early 1930s. He acquired a very good reputation as an intelligent interpreter of modern piano music. Later he increasingly accompanied singers and instrumental soloists, also in broadcasting. From 1936 Immisch taught at the orchestra school of the Staatskapelle Dresden and at the Hochschule für Musik Carl Maria von Weber in Dresden. A scoliosis, which was caused by an accident during gymnastics lessons at the age of thirteen and which, according to his sister, Immisch had to "bear with difficulty throughout his life", saved him from a wartime deployment. However, Immisch was pressed to join the NSDAP, which he refused to do. This led to his dismissal without notice in 1943. As a result of the Bombing of Dresden in World War II he gave up the city as his sphere of activity in 1945. After the end of the war, the Dresden Academy of Music and Theater renewed the offer to appoint him as lecturer at its institute. Immisch declined because of his poor state of health. He died in January 1949, shortly after reaching the age of 46, in his home town of Bautzen.