Born in the
Russian Empire in 1913, Zak made
aliyah to
Mandate Palestine, where he joined the
Haganah. On 17 March 1948 future Prime Minister
David Ben-Gurion (and at the time the leader of the
Haganah) gave the order to create a Jewish naval service. He remained as head of the Sea Service that became the Israeli Navy until April 1949 when he resigned in order to pursue a career in teaching. The following year he established the
HaKfar HaYarok youth village. Zak was a member of the executive board at
Yad Levi Eshkol. He was also responsible for renaming HaKfar HaYarok after
Levi Eshkol after he died. ==Awards and honours==