He studied law at the universities of Breslau and Kiel.[1] After his study he worked as a lawyer in Breslau[2] In 1930, he joined the Communist Party of Germany. After the Nazis came to power in 1933 he was no longer allowed to work as a lawyer because of his political affiliation.[2] Bolz went to Moscow, finding work as a teacher at the Marx–Engels–Lenin Institute. From 1941 to 1945 he was headteacher of the anti-fascist school, which aimed to indoctrinate German prisoners of war against fascism. During his stay in the Soviet Union, he became a Soviet citizen and retained dual citizenship.[3]