He led the National Union party from 2008 to 2012, for whom he was a member of the Knesset,[1] and is also the executive director of Beit El yeshiva Center Institutions and Arutz Sheva.

Katz graduated from the Bnei Akiva Yeshiva High School "Kfar Haroeh", and went on to study in Yeshivat Mercaz HaRav in Jerusalem.

[2] In the Yom Kippur War in 1973, Katz served in a group of twelve reservists under the command of Amatzia Chen who carried out operations within the division of Ariel Sharon.

[5] It was during that period that he met his future wife Tami, a sociology student at Bar-Ilan University, who had volunteered to work in Beilinson Hospital helping nurse the worst wounded.

After six months in hospital, he returned on crutches to study four more years in Yeshivat Mercaz HaRav under Rabbi Tzvi Yehuda Kook and Mazkir Bnei Akiva Shlomo Aviner.

Katz was involved in the absorption of olim from the former Soviet Union, and was responsible for building more than 35,000 housing units in East Jerusalem, the West Bank, and the Golan Heights.