Rabbi Dovid Heber, a native of St. Louis learned in Telshe Yeshiva Chicago and Yeshivas Ner Yisroel where he received semicha. Rabbi Heber was a Rabbinical Coordinator in the Kashrus Division of the OU in the early ’90s. He is the Rav of KAYTT in Baltimore and a Kashrus Administrator at Star-K. He recently authored The Intriguing World of Jewish Time: Fascinating Zmanim and Calendar Calculations published by Israel Bookshop Publications.