Grand Rabbi Yitzhak Aharon Korff is the Rebbe of Zvhil – Mezhbizh. He serves as Chaplain of the City of Boston and spiritual leader of Congregation Bnai Jacob, Zvhil–Mezhbizh Beis Medrash of Boston and Newton, Massachusetts. He is a dayan (judge of Jewish law) of Boston’s Beth din (rabbinical court) and Vaad HaRabbonim (council of rabbis). He is also Consul General to the government of Austria and publisher of the Boston-based Jewish newspaper The Jewish Advocate.