He would become a member of the Freien deutsche Jugend (Free German Youth) in 1918, then the Communist Party of Germany (KPD) in 1921 and then a co-founder of the Association of Proletarian-Revolutionary Authors in 1928.
He wrote for the KPD newspaper Klassenkampf (Class Struggle) in Halle and Die Rote Fahne after 1927.
Because of anti-fascist resistance and contacts to the group Weise, he would be in a concentration camp in 1933 and 1934, then the Zuchthaus and Emslandlager, after which he was a laborer under Gestapo supervision.
A representative selection of Lorbeer's poetic writings offered in the volume Chronik in Versen.
Gedichte aus fünf Jahrzehnten had appeared in the 1971 Mitteldeutschen Verlag as a piece of Lorbeer's Gesammelten Werken in Einzelausgaben.