He briefly served as a member of the Knesset for the Jewish Home in 2015.

Horowitz grew up in Merkaz Shapira, and attended Yeshivat Or Etzion, the Beit El yeshiva, and Mercaz HaRav Kook.

He later gained an MBA from Ono Academic College, and in 1990, he became head of a yeshiva in Kiryat Arba.

In 2010, he was appointed Adviser on Settlement Affairs by Nazareth Illit mayor Shimon Gapso.

[2] Although the party won 12 seats, Horowitz entered the Knesset on 16 February 2015 as a replacement for Uri Orbach, who died in office.