[4] In 1953, Weinberg traveled to Israel to consult with the Chazon Ish regarding the response needed to counter the threat of assimilation in the Jewish world.

As part of his job working as a salesman for his brother's company, Weinberg traveled to many small cities in the United States.

[5] In 1966, Weinberg decided to enter the field of kiruv (Orthodox Judaism outreach), and he opened the first yeshiva in this style for Jewish men in Jerusalem.

The school was short-lived, as were several other attempts, before he co-founded Yeshivas Shma Yisrael (later renamed Ohr Somayach) in 1970 with Nota Schiller, Mendel Weinbach and Yaakov Rosenberg .

[citation needed] In recognition of Aish HaTorah, the Israeli government awarded Weinberg the last two building sites adjacent to the Western Wall.

In 1996, he dedicated his newly designed yeshiva as the central location for Aish HaTorah's manpower and leadership training programs.