He obtained a job as a business manager and editor for the Deutschvölkischer Schutz- und Trutzbund, the largest, most active and influential anti-semitic organization in Germany.

He devoted himself to the military training of the SA to support Hitler's Bavarian forces in preparation for the expected putsch against the Weimar Republic.

From October 1926 to May 1929 he and Hellmuth von Mücke sat in the Landtag of Saxony; they were the first two members of the Nazi Party in a German parliament.

From September 1933 to May 1936 he was the Reich Representative of the Party for Gaue Berlin, Kurmark and Silesia, and from May 1934 served on the staff of Deputy Führer Rudolf Hess.

On 7 October 1939, Himmler was named Reich Commissioner for the Consolidation of German Nationhood (RKFDV) and created a new SS office for this function.

On 9 November 1940, Tittmann was promoted to SS-Brigadeführer and, on 1 July 1941, Himmler charged him with responsibility for representing the ethnic German interests of both VoMi and RKFDV to Ley's office.

[10] On 22 August 1942, Tittmann was replaced in Nikolajew by SS-Brigadeführer Waldemar Wappenhans, and was reassigned to the staff of the Higher SS and Police Leader (HSSPF) for "Russland-Süd," SS-Obergruppenführer Hans-Adolf Prützmann, in Kiev.

[11] Although Tittmann’s tenure in Nikolajew only began after the Nikolaev massacre of September 1941, it coincided with the so-called “second wave” of Holocaust murders.

As a result, the murder of women and children intensified … In Volhynia, Podilia, and the Mykolaiv region, mass executions were restarted at almost the same time.

Almost every day German police, aided by Ukrainian auxiliary policemen, killed thousands of Jews, especially in August and September 1942.

[12]In September 1944, however, Tittmann's career was derailed when he received a severe reprimand from Himmler for having diverted three Waffen-SS personnel away from their official duties to assist him with personal matters.