Rubuta ci gaba don wannan sakin layi - A lokacin 'yancin Faransa, Zyromski ya shiga ƙungiyar National Front. Bayan taron SFIO don sanya hannu kan Yarjejeniyar Haɗin kai da PCF ta gabatar, ya shiga PCF. Ya sami wa'adin zaɓen sa na farko a cikin 1946 a matsayin Kwamishinan Jamhuriyar don sashen Lot-et-Garrone, wanda zai ci gaba har tsawon shekaru biyu, ba zai sake tsayawa takara ba a 1948. A cikin PCF, Zyromski ya nuna 'yancin kai mai ban mamaki har ma lokacin da, a cikin 1959, ya sanya hannu kan wata magana inda ya soki rashin dimokiradiyya na ciki a cikin jam'iyyar. Bayan mamayewar 1968 na Czechoslovakia
, duk da haka, ya dakatar da duk ayyukan a cikin jam'iyyar. Bayan mutuwar matarsa a 1962, ya koma Melun inda ya mutu a 1975.