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Bio Information:
Rabbi Matlin was born in Slutzk, Lithuania in 1855. He studied at the yeshiva in Slutzk and Kovno and was ordained by Rav Yitzchok Elchanan Spektor (1817-1896), chief rabbi of Kovno. In 1891 he accepted an invitation from Rav Yaakov Joseph, chief rabbi of New York City, to serve as a dayan (judge) on his bais din. Shortly after Rabbi Matlin arrived in New York, Rav Joseph put him in charge of all of the kosher supervision services under his authority. In particular, he supervised all the shochtim regulated by the chief rabbi. After Rav Joseph’s passing 1902, Rabbi Matlin continued to serve as a mashgiach for kosher meat in New York City. In addition, he was the primary supervisor for the California Wine Association of New York. In 1897 Rabbi Matlin joined a group of fellow rabbonim and communal leaders, most of whom were from Lithuania, in establishing a yeshiva named in honor of Rav Spektor which became known as Rabbi Isaac Elchanan Theological Seminary (RIETS). He was also a founding member of the Agudath ha-Rabbonim.  Due to health concerns, Rabbi Matlin relocated to  Sioux City where he served in the rabbinate until his passing.
Source: Orthodox Judaism in America, A Biographical Dictionary and Sourcebook by Moshe D. Sherman; Dr. Yitzchok Levine 

Photo Credit: Judi Argaman
Rabbi Naftali Hertz HaKohen Zeichik was a member of the Agudas Harabonim during the first half of the twentieth century

Bio Information:
Rabbi Saul Bolotnikov came to Sioux City in 1936 and served all three of its Orthodox congregations, alternating his attendance each Saturday. This arrangement was in place until 1955 when the three congregations merger. He served the community until his death in 1995 at the age of 88.

Photo Credit: Moreshes Chachmei America Archives