Szold studied under Rabbis Jacob Fischer of Shalgaw, Wolf Kollin of Vrbové, and Benjamin Wolf Löw at the Pressburg Yeshiva, and received the rabbinical authorization from Judah Assod of Bur and Simon Sidon of Tyrnau. In 1848, he studied in Vienna, but when the revolution of that year broke out he went to Pressburg. From 1849 to 1855 he tutored in private families in Hungary, and in the latter year entered the Jewish Theological Seminary of Breslau and the University of Breslau, where he remained until 1858. While a student he officiated during the holy days at Brieg, Silesia (1857), and at Stockholm, Sweden (1858). In 1859, he accepted a call from the Temple Oheb Shalom (Baltimore, Maryland) in whose service he remained until his death, first as rabbi and later (after 1892) as rabbi emeritus. He arrived in the United States on September 21, 1859, about a month after his marriage to Sophie Schaar, and immediately took active charge of the congregation. Under his guidance it grew rapidly, and, actuated by his example, it became widely known for its strict observance of Shabbat. Before Szold's arrival the congregation had adopted for use in its Shabbat service the "Minhag America" (which was the new prayer-book written by Isaac Mayer Wise, a Reform rabbi); on the great fall holy days it reverted to the "Minhag Ashkenaz"; after much discussion with his congregation Szold introduced a new prayer-book, "Abodat Yisrael", which closely followed traditional lines. The first edition of this prayer-book appeared in 1863, with German translation, and was widely adopted by congregations in the United States; new editions were published in 1864 and 1865 (the latter with English translation), and another, revised edition in 1871, Rabbis Marcus Jastrow of Philadelphia and Henry Hochheimer of Baltimore being associated with Szold in its publication.