Rabbi Binyamin Yosef Kalmanzon was born in Chaifa, Neve Shaanan. Deciding to strengthen his relationship with Judaism, he left public high school to graduate in Yeshiva High School of Netanya. He then started studying at Yeshivat Hakotel, learning under Harav Yeshayahu Hadari, Harav Chagai Izirir and Harav Shagar z”l. For a significant amount of time Rav Benny served as a rabbi for Yeshivat Hakotel and then in Yeshivat Kiryat Shmone. After some time, together with his friend Rav Ami Olami z”l, Rav Benny established a kollel for Jewish law and Halacha in the yeshuv Otniel. This Kollel eventually evolved into what is Yeshivat Otniel of today.