[1] He was replaced before the end of the usual 5-year term because of his difficulties in managing relations with the native Tlingit peoples, who were important to the Russian fur trade and their survival.
In 1848 Ashkenazi Jewish settlers from Germany began to settle in Sitka, helping develop it and other settlements as cities in the nineteenth century.
During Rosenberg's three years of overseeing company operations from New Archangel (Sitka), the naval officer had difficulties with the native peoples.
He did not complete what was by then a standard 5-year term as governor, and he may have been called back to Russia as an experienced officer to serve in the Crimean War (1853-1856).
Rosenberg was the first chief manager of the Russian-American Company to be replaced before the end of his term since Semyon Yanovsky, who served from 1818 to 1820.