Rabbi Yossi Rosenblum was ordained from the United Lubavitch Yeshiva in 1987. Following his ordination, he became one of the first rabbinic students to enter the Soviet Union. During his travels, he met with Jewish community members in Moscow, Leningrad, Odessa and Tiblissi. Rabbi Rosenblum followed that trip with a visit to Israel where he met with former Soviet refuseniks. Upon returning to New York, Rabbi Rosenblum submitted a full report of his activities to the Lubavitcher Rebbe.

Rabbi Rosenblum has over 20 years experience in the field of Jewish education. As a student emissary of the Chabad movement (shaliach), he helped to establish Yeshiva Tomchei Tmimim Lubavitch in Johannesburg, South Africa. He also served as head counselor of Camp Gan Israel, in Parksville, NY.

In 1992, Rabbi Rosenblum, joined the staff at Yeshiva Achie Timmim in Pittsburgh, PA. Two years later, he became Principal of the Boys Division. While serving as principal, the Yeshiva was recognized as a Blue Ribbon School of Excellence by the U.S. Department of Education.

Rabbi Rosenblum is an innovative educator and administrator. In 1994, he founded the International Sefer HaMitzvos Competition and authored the Sefer HaMitsvos booklets used by 40 schools as part of their curriculum. He also worked with leading educators and scholars on the ground-breaking Gemara

Berura teaching methodology. As part of this effort, Rabbi Rosenblum was responsible for developing the workbook on hascholas gemora. This unique workbook helped teachers fulfill the words of King Solomon to "teach a child according his way" using advanced techniques such as Differentiated Instruction (DI) and Understanding by Design (UBD). Rabbi Rosenblum has lectured on these techniques and the Gemara Berura all over the country.

Rabbi Rosenblum is also a popular lecturer who has taught adult education classes on parenting, Jewish mysticism, Talmud, and other topics. He is married to the former Chana Laine from Brooklyn and is the proud father of 11 (KI"h) children.