After his arrival in Palestine, he became close to the Chazon Ish. He married the daughter of Rav Shmuel Greineman, the Chazon Ish's brother-in-law. After his marriage, he began teaching in Yeshivas Beis Baruch, before becoming a rebbi in Yeshivas Mir, and in 1965, after his father's passing, he began to head the yeshiva.[2]
His son-in-law Rabbi Nosson Tzvi Finkel, (who is also his first cousin's son), is the previous rosh yeshiva of Yeshivas Mir in Jerusalem. Three other sons in-law act as associate Roshei Yeshiva, they are Rabbis Binyomin Carlebach, Nachman Levovitz, and Yisroel Glustein (who also has his own shiur in the Mir) .
Another of his sons-in law, Rabbi Ahron Lopiansky, is rosh yeshiva of Yeshiva of Greater Washington in Silver Spring, Maryland.