Hirsch was one of the founders of the Reichsvertretung der Deutschen Juden and was named to its board of directors; the president was Leo Baeck.
Hirsch moved to Berlin to devote himself to his duties, first taking a leave of absence and later resigning as president of the Württemberg Jewish Community's high council.
In 1938, he represented German Jews at the international Évian Conference in France, convened at the initiative of Franklin D. Roosevelt.
[1] In July 1939, the security police named Hirsch, Baeck and others to the board of the newly formed Reichsvereinigung der Juden in Deutschland, with which the Reichsvertretung was forced to merge.
Since 1985, a medal in Hirsch's name is awarded annually by the city, along with a Judaeo-Christian organization and the Jewish Religious Community.