She is considered the first female cantor in the United States, serving San Francisco's Temple Emanu-El from 1884 until 1893.

After completing her studies at the Stuttgart Conservatory, she relocated to Baltimore, Maryland in 1864 to join her sister, Pauline Eichberg.

In 1877, she returned to Europe for a second time, performing in various cities including Nuremberg, Mainz, Stuttgart, Cologne, Amsterdam, Berlin, and Dresden.

Her teaching success extended to preparing students for church choirs, concert performances, and opera stages, earning her the epithet "the Marchesi of the West."

Julie Rosewald was celebrated for her extraordinary musical memory, capable of memorizing a leading role in a single night.