His studies began in the Yishuv Hachdash in Tel Aviv, Israel and continued in Yeshivat Chevron in Jerusalem.

A year later the Chazon Ish sent Abadi to study in Lakewood, New Jersey, under the famed Rabbi Aharon Kotler.

After Rav Kotler's death, Rabbi Abadi emerged as one of the leading poskim for the Lakewood community.

In 1993, Rabbi Abadi transferred his Kollel to Har Nof, Jerusalem, where it continued to produce scholars trained to decide halachic questions touching on every aspect of Jewish law.

Owing to his prominence as a posek, Rabbi Abadi is asked the most difficult questions, in which he issued a number of innovative and controversial decisions.