[2] Drawn to right-wing politics, in July 1921 he joined the Deutschvölkischer Schutz- und Trutzbund, the largest, most active, and most influential anti-Semitic federation in Germany.

During an SA street demonstration in October 1931, Maass was severely injured when he was struck in the head by a hatchet, requiring the insertion of a metal plate in his skull.

On 15 March 1933, Maass was dismissed from his position in the Customs Office for his part in a violent demonstration that resulted in breaking the windows at the Social Democratic newspaper, Danziger Volksstimme.

[3] In addition to his political career, Maass was a long-serving member of the Schutzstaffel (SS) which he joined on 15 January 1933.

Maass led SS-Sturm (company-level) formations of the 36th SS-Standarte in Danzig between January 1934 and June 1937.

[4] On 1 May 1940, Maass was assigned to the SS-Sicherheitsdienst (Security Service, SD) District Office in Danzig with the rank of Sturmbannführer.

Finally, on 1 April 1943, he was transferred to the Reich Security Main Office in Berlin where it is believed he served until the end of the Second World War.