Zvi was born in Hadera 1931. His parents, Esther and Moshe Rossa, owned a bakery in the city, in which their five children worked as well. Zvi grew up in a religious family and studied at different religious educational institutions: ‘Tachkemoni School’ in Hadera, ‘Bnei-Akiva Yeshiva’ in Kfar Ha’roeh, and the ‘Hayeshuv-Hachadash Yeshiva’ at Tel-Aviv. In late 1945 he joined Lehi  aged fifteen. At first he worked  distributing information material, spying on British military bases and  transporting explosives. Later he participated in various operations such as laying down mines in various locations near Hadera.

After two years’ underground activities the British caught him on the day of the  Akko Prison escape, May 4,1947. He and his comrades had been instructed to wait for a group of prisoners who were about to escape and to delegate them to places designated earlier. While  waiting they were arrested and after  lengthy interrogation, they were placed in Latrun Detention Camp. After several months they attempted escape by digging a tunnel. The escape plan was foiled since the tunnel was discovered by the British. Zvi was only released when the British finally left the country. In 1950 he joined the IDF and served in the “Golani” Brigade.

In 1952 he married Rachel Lovshavski in Hadera and their  three children and eight grandchildren were born there. As a  civilian, he at first  worked as a journalist for the daily paper ‘Cherut’, and was active in the Cherut movement. Afterwards he moved with his family to Haifa, working there as a reporter for ‘Yediot-Acharonot’ paper 25 years. He published his book, “Boys in the Underground” 1977, recounting  his personal story of a youth fighting in  Lehi’s ranks. Zvi passed away on June 26, 1993, aged 62.