Ха-Поэль ха-Цаир
Born in Kraków in Austria-Hungary (today in Poland), Feldman was educated at a yeshiva, and later studied at the Institute for Commerce and Economics Studies in Kraków, and was certified as a rabbi. In 1920 he joined the Hapoel Hatzair Tzeiri Zion federation. He also served as chairman of the local branch of Tarbut.