[1] Grossmann immigrated to America when he was ten with his father, who became rabbi of Congregation Beth Elohim in Brooklyn, New York.
He was ordained a rabbi at Hebrew Union College that year, and in 1888 he received a Doctor of Divinity from there.
He was also appointed a Professor at Hebrew Union College that year, teaching theology, ethics, and pedagogy.
As pedagogy professor, he was a pioneer in methodology to Jewish education in America and wrote a number of pamphlets on the subject to help teachers.
[5] Following Grossmann's retirement as rabbi he moved to Long Beach, California, living there for the last five years of his life.