R. Ahron Jeruchem was born in Limanowa, Poland in 1904, the son of R. Hayyim Yitzhak Jeruchem who had served as the Av Bet Din of Altstadt, and was the author of responsa entitled Birkat Yitzhak. R. Hayyim Yitzhak Jeruchem also wrote more than 100 essays that were lost (destroyed by the Germans.)

R. Ahron Jeruchem attended the Vienna Yeshiva, and received Smicha in 1927. He married Miriam Devorah Halberstam in 1933.He served as a Rabbi at Cong. Ahavat Torah in Vienna from 1930 to 1938, and served as Rabbi also at Cong. Mahazikei Torah in Vienna and came to the United States in 1940. While still in Vienna, he organized Javneh, a movement for young Jewry for a religious Palestine. In the United States, R. Jeruchem assumed the rabbinate of Anshe Alstadt, and later founded Cong. Sinai in New York. R. Jeruchem founded Ezra, an organization which saved people in Europe and brought them to the United States.

R. Jeruchem was also active in Kollel Hibat Yeruchalayim, Histadrut Hoadmorim and the Union of Orthodox Rabbis of the United States and Canada. R. Jeruchem was also the author of Ohel Rachel, on unpublished manuscripts of Nahmanides, World Lost , on life in Europe, Test and Contest, Divrei Yehezkel, and Lo Tishkah (Don't Forget), A Hasidic rabbi's early account of the Camps.