 In 1904 he was appointed head of the Kneseth Beis Yitzchak Yeshiva in Slobodka.During World War I Rav Boruch Ber had to leave Slabodka and relocated the yeshiva to Minsk and then to Kremenchug and Vilna.In 1926 he re-established the yeshiva in Kaminetz, where it continued to attract hundreds of students for the next 13 years.