He settled in Berlin in 1815, studying at the University of Berlin and obtaining a doctorate from the University of Halle. He was ordained by the Hungarian rabbi Aaron Chorin, an early supporter of religious reform, and served for two years teaching and giving sermons in the Beer reformed synagogue in Berlin. He found the career uncongenial, and in 1840 he was appointed director of a "Lehrerseminar," a post which relieved him from pecuniary troubles. Zunz was always interested in politics, and in 1848 addressed many public meetings. In 1850 he resigned his headship of the Teachers' Seminary, and was awarded a pension. Throughout his early and married life he was the champion of Jewish rights, and he did not withdraw from public affairs until 1874, the year of the death of his wife Adelheid Beermann, whom he had married in 1822.