Rabbi Yacov Halevi Lipschutz, the predecessor of Rabbi Menachem Genack at OU Kosher from 1977 to 1980, was a highly respected and knowledgeable figure in the field of kashrut.

Rabbi Chaim Yisroel Belsky was known for his immense intellect, encompassing a deep understanding of Torah and the scientific and mathematical knowledge to apply halachah in practical situations.