Rabbi Harcsztark is the Founding Principal of SAR High School and Dean of Machon Siach honoring the memory of Belda Kaufman Lindenbaum z”l, a research arm of SAR High School. He previously served as Rabbi of Congregation Keter Torah in Teaneck, New Jersey, and as the Associate Principal of Judaic Studies at SAR Academy. He was a Fellow at the Tikvah Center for Law and Jewish Civilization at NYU Law School in 2010-11. He is the recipient of the 2017 Covenant Award for Excellence in Jewish Education.