In 1934, Darwish returned to Egypt and started his career as a labour lawyer and political organizer. Together with two other Egyptian Jewish activists - Ahmad Sadiq Sa'd and Raymond Douek- he cofounded a new secret Egyptian communist organization and a magazine known as
Al Fajr Al Jadid () or the New Dawn, that was linked to many
trade unions. By the mid-1940s, Darwish had become the legal representer to 67 of Egypt's then 170
labour unions, WCNL later turned to the "
Workers and Peasants Communist Party (WPCP)" and then fused with other communist organizations at the time in the "Communist Party of Egypt (CPE)" (), which then split into CPE and
HADETU. In 1958, the former Egyptian president
Gamal Abdel Nasser arrested and jailed all known communist activists, including Darwish. He remained in prison for 6 years, during which he was frequently beaten and tortured. ==Views on Zionism, Jews in Egypt, and Jewish exodus==