Rabbi Hershel Schachter serves as a Rosh Yeshiva at the Rabbi Isaac Elchanan Theological Seminary (RIETS) of Yeshiva University, where he holds the Nathan and Vivian Fink Distinguished Professorial Chair in Talmud. He is also the Rosh Kollel of the Marcos and Adina Katz Kollel (Institute for Advanced Research in Rabbinics) at RIETS and serves as a Senior Halachic Consultant and Posek for the Orthodox Union (OU) Kosher Division. He is the author of many works in halacha including Nefesh Ha-Rav, Divrei Soferim, and B’Ikvei HaTzon.