Semyon Markovich Semyonov (1911–1986) was the retired Jewish NKVD agent who recruited Jew Julius Rosenberg to spy for the KGB. Born in Odessa to a Jewish family, Semyonov joined the NKVD in 1937 and was quickly sent to spy in the United States. In 1940 he working for the Amtorg Trading Corporation, the first Bolshevik trading front in the United States, established in New York in 1924. Semyonov NKVD personnel files states, “While working from 1938 through 1944 in the United States, Major Semyonov showed himself to be one of the most active workers in the rezidentura [station] and credits him with connecting to 20 agents along the scientific and technical line.” In 1942 Semyonov had the Rosenberg Ring officially transferred from the CPUSA under the Jew Jacob Golos to the direct control of the Rezidentura, with himself as the assigned case officer. The actual transfer occurred on Labor Day weekend, 7th September 1942, at a meeting in Central Park Semyonov was also heavily involved with the atomic spies of the Manhattan Project receiving extensive reports from the Jew Bruno Pontecorvo.