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Aba also established close links with many of the leading rabbinic luminaries of the time, whom he consulted for advice, and whom he offered his services - men such as Rabbi Leib Gurwicz, Rabbi Avrohom Babad, Rabbi Yitzchok Hutner, Rabbi Moshe Feinstein, Rabbi Eliezer Menachem Schach, and Rabbi Yosef Kahaneman, the Ponovezh Rav.
Rabbi Yisrael Alter of Ger, Rabbi Menachem Mendel Schneersohn of Lubavitch, and Rabbi Moshe Feinstein were among those who prevailed upon him to accept the position, while Boyaner Hasidim kept reminding him of the great moral responsibility he had to keep the dynasty going.