Career
After a merchant apprenticeship, military service in the Franco-Prussian war, and work in bookkeeping, he initially managed membership of the Commercial Association. He then became a business teacher and in 1878 founded his "Business Teaching Institute" (Handels-Lehr-Institut) in Hannover, which later became "Berliner"s Advanced Business School." The school taught mathematics, bookkeeping, trade and exchange, correspondence, and stenography. In 1903, the school was officially accredited as a vocational school.
He was also involved in the management of a Jewish school in Ahlem, founded by Hannover Banker Alexander Moritz Simon (d ).
Siegfried took over direction of Berliner"s school in 1813, but was appointed a professor of business administration at the Imperial University of Tokyo. Manfred Berliner died in 1931 and is buried at the Jewish Cemetery "An der Strangriede" in Hannover.
In his lifetime he came to own 80 properties in Germany which are still held in trust to benefit his heirs. The properties were subject to extensive litigation following the Nazi regime.