كريات أربع
Waldman was one of the leaders of Jewish settlement in Hebron, and one of the founders of the Kiryat Arba settlement. He founded Yeshivat Nir in Kiryat Arba in 1972 alongside Yehoshua Rosen and Moshe Levinger, later becoming its president, with his son Noam as Rosh Yeshiva. According to Menachem Livni, in 1980 Waldman volunteered to take part in a Jewish Underground plot to carry out car bomb attacks against Palestinian officials.