Rabbi Yossi Marrus brings close to three decades of educational, administrative, and rabbinic knowledge and experiences to our school. Rabbi Marrus began teaching Judaic Studies at the Oholei Torah Day School in Brooklyn, NY and upon his arrival to San Antonio began teaching in the local Jewish Day School (JNA/EKA). In 2009 Rabbi Marrus became the Judaic Studies Director and part of the administrative team until its closing.

In 2013, Rabbi Marrus, together with Rabbi Chaim Block and Rabbi Aryeh Scheinberg of blessed memory founded the Starr Family Jewish Day School (formally TASA,Shmuel Bass Torah Academy) and has been part of the administrative team, directing the Judaic and Hebrew studies department. In 2018 Rabbi Marrus was appointed Dean of Students. He serves as a liaison to the parents, mentor to the faculty, and works closely with the community leadership and rabbis in ensuring the long-term vitality and growth of our Jewish Community Day School.

Rabbi Marrus has been active in Jewish education in many positions including; associate rabbi/ administrator of the Chabad Center for Jewish Life, director of Camp Gan Israel, Chai High instructor, founder and director of Torah Teens, C-Teen advisor, and has served on multiple national educational and youth education boards. He is the founder and executive director and rabbi of Chabad of Boerne.

Rabbi Marrus received his BA of Religious Studies from the Rabbinical College of America and after studying abroad in Israel, received his Rabbinical Ordination from Central Yeshiva Tomchei Tmimim Lubavitch, as well as the Yeshivat Chabad of Safed, Israel.

Rabbi Marrus is actively involved in Israel advocacy and education and leads yearly trips for young adults from throughout the United States with the Taglit-Birthright Israel organization. In 2020 he was nominated as a Birthright Fellow and senior leader.