Tzvi was born on 5 December 1928, to Yaakov Shmuel and Malka Schumer, in the city of Khust in Zakarpattia (now part of Ukraine, then part of Czechoslovakia), oldest of four children. The family was religious, traditional and Zionist. Yaakov Shmuel made aliyah in 1935, while the mother Malka and their four children did so in 1937.
Tzvi studied in the Talmud Torah and Yeshivat HaYishuv HeHadash. He was a member of Brit Hashmona’im in Tel Aviv, a Religious Zionist youth movement. He then easily moved on to Lehi. In the summer, at age sixteen, he joined Lehi and worked in the youth department. His sister Leah (Ariella), who became a legend in her own right, followed in his footsteps, and his sister Shoshana (Esther) did the same. Finally the youngest brother Moshe (Boaz) joined.
In March 1946, he was imprisoned by the British, tried and sentenced to three years of imprisonment. He sat in Jaffa Prison and Jerusalem Central Prison. Two months before the State was established, in March 1948, he was released, and he immediately returned to full duty in Lehi.
When the War of Independence began and the Arab armies invaded, he joined the IDF’s 8th Brigade under the command of Yitzhak Sadeh. He was assigned to Battalion 89, as the communications sergeant of the famous Company A under Yaakov “Blond Dov” Granek.
He married Sarah Zitanick, from the settlement of Atarot. They have a son, Ittai, and two daughters, Leah and Merav.
After his demobilization, he studied at the Technion and completed, with honors, his degree in civil engineering.
After a decade working in this field in Israel and aboard, he joined the family business established by his father, Yaakov Shmuel.
He took early retirement and devoted himself to agriculture.