A design modeled on Cleveland's Park Synagogue was created, and following groundbreaking in September 1957, the new structure, the Congregation's fourth home,[6] with seating for 600 and able to accommodate 2,200 for High Holy Days services, was first used in June 1959.

[2] During the 1950s, Shusterman was a regular panelist on the weekly television program To Promote Goodwill, an interfaith discussion of social and religious issues by clergy representing Jewish, Catholic, and Protestant views, produced by WBAL-TV and broadcast worldwide on the Voice of America.

Einhorn formulated the Olat Tamid siddur for use in services, which became one of the models for the Union Prayer Book published in 1894 by the Central Conference of American Rabbis.

[9] Reverend Dr. Jacob Mayer was appointed as Rabbi in 1874, though he was forced to leave the congregation two years later amid allegations that he had previously converted to Christianity and been a missionary in Africa.

[2] After receiving his rabbinic ordination in 1883 as one of the first four graduates of Hebrew Union College, David Philipson was named as Har Sinai's rabbi in 1884, and served in the position until 1888.

[18][19] In 1892 the congregation built the Eutaw Place Temple, designed by architect Joseph Evans Sperry who modeled it after the Great Synagogue of Florence in the Byzantine Revival style.

[20] In 1953 the congregation acquired land in Pikesville, and, in 1960, finished construction of its building on Park Heights Avenue, designed by Sheldon I. Leavitt with consulting architect Walter Gropius.