Mayer Alter Horowitz

Mayer Alter Horowitz
Bostoner Rebbe of Jerusalem
Rabbi Horowitz at a Hachnasat Sefer Torah in Har Nof, 2013
Term	December 2009–
Full name	Mayer Alter Horowitz
Born	Boston, Massachusetts
Predecessor	Rabbi Levi Yitzchak Horowitz
Father	Rabbi Levi Yitzchak Horowitz
Mother	Raichel Ungar

Mayer Alter Horowitz is an American Hasidic rabbi. Since 2009, he has been the Bostoner Rebbe of Jerusalem.

Rabbi Mayer Alter Horowitz was born in Boston, Massachusetts, to Rabbi Levi Yitzchak Horowitz, the second Bostoner Rebbe, and Raichel Unger Leifer. He is a ninth-generation descendant on the male line of Rabbi Shmuel Shmelke Horowitz, the Nikolsburger Rebbe (1726–1778). His older brother, Rabbi Pinchos Dovid Horowitz, is the Bostoner-Chuster Rav of Borough Park, Brooklyn, and his younger brother, Rabbi Naftali Yehuda Horowitz, is the Bostoner Rebbe of Brookline, Massachusetts. His sister Shayna Gittel is married to the Vialopola Rebbe of Flatbush, and his sister Toba Leah is married to Dayan Rabbi Moshe Chaim Geldzheler of Jerusalem.

Horowitz received his rabbinic ordination at the Ponevezh Yeshiva in Bnei Brak and Beth Medrash Govoha in Lakewood, New Jersey.

In the 1960s, after receiving his ordination, Horowitz returned to the United States and expanded the pioneering work of his father, the Bostoner Rebbe, in medical referral, by establishing Project ROFEH, which later evolved into what is currently known as R.O.F.E.H International, a community-based medical referral and hospitality liaison support agency. He continued to be active in the medical referral remotely from Israel until approximately 1999.

From 1969 to 1989 he was the Senior Rabbi of Congregation Beth Pinchas in Brookline, Massachusetts. With the backing of his father, he was one of the forces behind the establishment of Torah Academy of Boston in the 1980s.