"Rabbi Leo Jung (June 20, 1892 in Uherský Brod, Moravia – December 19, 1987 in New York City, United States) was one of the major architects of American Orthodox Judaism.
"His father, Rabbi Dr. Meir Tzvi Jung held rabbinic post in Mannheim then was elected Rabbi of Uherský Brod in 1890. Rabbi Meir Tzvi Jung believed in the Torah im Derekh Eretz (Torah combined with worldly activity) philosophy of Rabbi Samson Raphael Hirsch. Later he moved to London. Rabbi Leo Jung's father founded schools in Uherský Brod, Cracow and London, where both religious and secular learning took place. In London, Rabbi Meir Tzvi Jung was a leader in Agudat Yisrael, and the Sinai Movement. The Sinai Movement was a movement in which young men would meet for the purpose of studying Talmud and socializing. At his death in June 1921, Rabbi Jung was the Chief Minister of the Federation of Synagogues in England, an appointment he had held since 1912."
Audio of Rabbi Jung
"...he was on the Executive Committee of the Rabbi Samson Raphael Hirsch Society, whose goal was to translate works by German Orthodox thinkers into English. These works became the core of the Feldheim publishing house."
Video at 3:50