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other events coming up:

Evening Course

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Shabbat in the Park

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Rabbi Hanniel Levenson

head rabbi

Rabbi Hanniel Levenson was born in Haifa, Israel and his formative years were shaped in Manhattan, NYC. Hanniel received a B.A. in Religion & Art from New York University, a Master of Science in Environmental Policy from Bard College, and Rabbinical Ordination from The Academy for Jewish Religion.

  Hanniel was a competitive gymnast for 15 years and is now a yoga teacher and personal trainer.


Founder of The House of Surf and Prayer; Hanniel asks all free seekers and spiritual warriors to join him on the body-mind-soul train.  

Life is a journey in practices of playfulness, liberation, and cosmic wonder. Drawing upon the wisdom masters of the world's traditions and cultivating the ritual architect potential in all. 

Rabbi Joseph Potasnik

rabbi emeritus

Rabbi Potasnik served as spiritual leader at Congregation Mount Sinai for 42 years. He is currently Executive Vice-President and former President of the New York Board of Rabbis, the largest interdenominational body of its kind. He is also co-host of Religion on the Line, WABC 770 AM’s longest running talk radio program, which airs every Sunday from 7:30am-10:30am. Rabbi Potasnik has served as Chaplain of the New York City Fire Department, the Fraternal Order of Police, and the New York Press Club, maintaining a high profile in public affairs in the City. A native of Lynn, Massachuetts, Rabbi Potasnik received a BA from Yeshiva College and an MS from the Bernard Revel Graduate School of Yeshiva University. He received rabbinic ordination from the Rabbi Isaac Elchanan Theological Seminary at Yeshiva University in 1972, and a JD from Brooklyn Law School. He is the proud father of Harrison Potasnik.

Marlene Antebi

director of education

Marlene is a talented and energetic educational leader who is dedicated to the continuity of Jewish education and community. As a veteran director of youth programming, she is committed to creating a positive experience for students in Hebrew school and in a Jewish environment. She strives to provide students with engaging, enriching, and interesting programs and curriculum, giving them the opportunity to create art projects, develop family events and listen to students needs. She is the mother of four and lives in Brooklyn.

Bob Kahan

administrative director

Bob comes to CMS with a diverse background. He was the first Executive Director of Temple Am Echad in Lynbrook, Long Island, where he was responsible for establishing administrative procedures for two newly-merged congregations; Event Coordinator/Office Manager for Temple Israel of the City of New York, where he coordinated facility use and scheduling among other duties;  Director of Event Programming for the Williams and Princeton (Alumni) Clubs, establishing and coordinating event and social calendars; and an editor for DC Comics, where he grew a collected edition publishing program to lead the industry. He was also a lighting designer and stage manager for modern dance and theater, and is currently very active in alumni affairs for his alma mater Purchase College. He is also a fledgling writer, a longtime resident of Park Slope, has two cats called Buffy and Knightly.

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