Meet the Team

Rabbi Dovid Horwitz is the founder and director of RCK, which he established in 1998. A respected posek and dayan, Rabbi Horwitz had been accepted to leading American medical schools before choosing to learn in Yeshiva Toras Moshe in Jerusalem. After ten years of intensive study, he received semicha from the Rabbanut and from Rav Zalman Nechemiah Goldberg zt"l. Together with his wife Elana, he moved to Ra'anana to fulfill his vision of opening a community kollel - a vision that has since transformed the city into a vibrant center of Torah life. Rabbi Horwitz gives shiurim multiple times a week and serves as a leading halachic authority for the Anglo community.

Rabbi Tzvi Licht has served as Rosh Kollel and Sho'el U'meishiv of RCK since its founding in 1998. His responsibilities include answering halachic questions, delivering shiurim to the avreichim, and learning with community members. Rabbi Licht's combination of Torah scholarship and accessibility has made him a vital resource for the Ra'anana community.

Rabbi Shabtai Yogel, a dayan and posek, serves as the Rosh Beis Hamidrash. He is also the rav of Kehillat Bnei HaYeshivos in Ra'anana and serves as a Rav Tzva'i. Rabbi Yogel is known for his popular shiurim, offered regularly through RCK, and for his broad extensive knowledge and sensitivity when answering shaalos for the entire community. He is the author of a two volume set of shaalos and teshuvos, Sefer B'sod Siach.

Ben Goldstein is Director of RCK, responsible for the organization's management, development, and growth: planning and executing day to day operations, recruiting and managing staff and avreichim, and developing programs and initiatives to expand the kollel, with a focus on Ra'anana's English speaking community. He previously served as a Krav Maga officer in the IDF's Yahalom unit, holds senior instructor certification from the Wingate Institute, and has managed martial arts institutes in Israel and the United States.

Rabbi Ariel Abrahams has been a member of RCK for over 27 years — having the privilege of being one of the first families to join. A close talmid of the Manchester Rosh Yeshiva, he also learned from the prominent rabbonim and roshei yeshiva of the Mir, including Rav Shlomo Volbe and Rav Nosson Tzvi Finkel. He received semicha from Rav Elimelech Kornfeld and Rav Moshe Halberstam. Rabbi Abrahams currently serves as the rabbi of Kehillas Derech Emunah, the Israeli kehilla that bridges RCK with the broader Israeli community in Ra'anana, and delivers shiurim and drashos spanning halacha, hashkafa, and a wide range of Torah topics.

Originally from Chicago, Rabbi Isaac Bernstein learned in Yeshivas Netiv Aryeh in Jerusalem and received semicha from Yeshivas Rabeinu Yitzchak Elchanan. He continued learning in the Passaic Community Kollel and was the assistant rabbi at Etz Chaim in Livingston, NJ, and NCSY director before making aliya to Ra'anana in 2024. At RCK, Rabbi Isaac is known for his push for limud haTorah and inspiring shiurim, including his popular Monday night shiur "Living Inspired", women's shiurim, and much more. He also serves on the rabbinic team at Kehillat Bnei Aharon (KBA) where he gives drashos and shiurim.

Rabbi Yosef Blaustein serves as the rav of Beit Keneset Mimamaakim in Ra'anana. At RCK, he leads a Daf Yomi shiur, facilitates chaburos in Halacha, and devotes time to learning with baalei batim and community members, both in Hebrew and Spanish. In addition, he offers Torah-based emotional counseling under the guidance of Rav Moshe Boyar.

From Netanya, Shmuel has been part of RCK for 5 years. He learned in Ohr Yisrael in Petach Tikva and later in Nesivos Chochma in Bayit Vegan. He currently gives shiurim to community members and leads top chaburos for children of the RCK community. A warm and fantastic role model, he currently teaches 4th grade boys in Siach Yitzchak in Bnei Brak.

Rabbi Guy Dvir has been a member of RCK for approximately 10 years and serves as one of its dayanim. He is the rav of Kehillat Bnei Yosef in Ra'anana and offers a wide range of shiurim, including on topics of Kabbalah.

From Ramat Gan, Rav Itamar Gibli learned at Yeshivas Darchei Torah in Far Rockaway, NY. He later learned in Ohr Sameach where he became a talmid of Rav Yitzchak Breidowitz. Rav Gibli has been a member of RCK for approximately 12 years. In the mornings he works as a special education teacher. At RCK, Rav Gibli - known for his unique, deep and engaging presentation - gives inspiring shiurim, including a daily Mishnah shiur. His Torah and special personality connect and resonate deeply with his students and broader community.

Rav Eli Isaacs was born and raised in Los Angeles. He attended YULA for high school and afterward proceeded to study in Yeshivat Kerem B'Yavneh. After two years in Kerem B'Yavneh he spent four years as a madrich in Yeshivat Torat Shraga, while simultaneously learning in Gruss Kollel. At the same time, he pursued a degree in computer science at Machon Lev. After getting married to his wife Talia, he then spent the next several years learning in the Mir yeshiva, while first residing in French Hill and then moving to Ramat Beit Shemesh. He now lives in Ra'anana, along with his wife and daughter, and is a budding member of RCK.

Originally from Beit Shemesh, Rav Itai Iskovitch learned in Yeshivas Chevron in Jerusalem. He joined RCK in 2021 and devotes time to learning with baalei batim and children. In addition to his Torah learning and teaching, he oversees RCK's logistical coordination and manages its otzar seforim.

Originally from Santa Monica, California, Rav Baruch Lipman joined RCK in 2023. A steadfast presence in the beis midrash, he dedicates his time to delving into the depths of Torah and learning with adults and children from the community.

Rav Avraham Aharon Mandelbaum learned in Yeshivas Tifrach and Mir Yerushalayim. He joined RCK in 2024. He oversees RCK's Matmidim program for kids, gives chaburos to children, and learns with baalei batim. Exuding life and energy, Rav Avraham Aharon brings love and excitement for Torah to every person he learns with and is dedicated to nurturing the Torah growth of every community member he encounters. In addition, he's a talented musician and singer, always ready to whip out his guitar whether for a kumzitz, simcha or program.

Rabbi Moshe Ariel Margi studied at Yeshivas Soloveitchik and Yeshivas Toras Zev and is known for his sharp and clear approach to Torah learning. He currently serves as a Daf Yomi Maggid Shiur at RCK, giving regular shiurim to the community since joining RCK six years ago. Rabbi Margi also writes a weekly Torah column in the RCK newsletter, sharing insights on the weekly parsha and Torah thought.

Rabbi Yaakov Nadav, originally from Tel Aviv, learned in Ohr Yisroel in Petach Tikva before continuing his learning at Yeshivas Rav Chaim Berlin in New York. He received Rabbanut semicha from Israel and has served as a maggid shiur for Daf Yomi for many years. Rabbi Nadav has been a member of RCK for approximately 18 years, and in addition to being part of RCK, serves as the rav of Beit Keneset Admon Safra in Ra'anana.

Rabbi Yosef Postelnek received semicha from Yeshivas Rabeinu Yitzchak Elchanan and learned in Kollel Zichron Amram of Yeshiva of Greater Washington. Prior to making aliya in 2025, he served as the assistant rabbi of Young Israel Shomrai Emunah in Silver Spring, Maryland. At RCK, Rabbi Yosef delivers a wide range of shiurim from Penimiyus HaTorah to Halacha - including a dedicated Halacha shiur for women - directs programming and creates much of RCK's Torah content such as source sheets, the Dor L'Dor Parshalink, and the RCK Pesach guide. He also serves on the rabbinic team at Kehillat Bnei Aharon (KBA) where he delivers drashos and shiurim.

Originally from Australia, Rav Aharon Rabi learned in Yeshivas Mir before joining RCK, where he has been an esteemed and valued member for approximately 20 years. He leads a daily Daf Yomi shiur in English and devotes time to learning one-on-one with adults and children throughout the week. Known for his warm personality, Rav Rabi is a welcoming and familiar presence in RCK's beis midrash.

Originally from New York, Rav Binyomin Rosenberg studied in Lakewood and at the Palo Alto community Kollel. He joined RCK in 2024, bringing his depth and sharp analytical learning to the beis midrash. Rav Binyomin regularly learns with baalei batim and community members.

Rabbi Yitzchok Wilk has been a member of RCK since its very founding — one of the original families who came with Rabbi Horwitz when he established the Kollel 27 years ago. In the mornings he serves as a rebbe at Chorev School.

Rav Shlomo Zak, originally from Kfar Chasidim, has been learning at RCK for approximately seven years. Before that, he learned in Yeshivas Toras Zev under HaRav Baruch Soloveitchik. He learns with children and members of the community.

Originally from Elkins Park, Pennsylvania, Rabbi Yisroel Zaslow learned in Yeshivas HaKotel in Jerusalem and received semicha from Yeshivas Rabeinu Yitzchak Elchanan. He was also a fellow of the prestigious Kollel Elyon. Rabbi Yisroel made aliya to join RCK in 2025 and now gives a well-attended daily Kitzur Shulchan Aruch shiur and learns regularly with baalei batim. He was actively involved with NCSY and uses that experience to connect and learn with teenagers at RCK. He is currently completing a Master's degree in Education from the Azrieli Graduate School of Jewish Education.