At the age of 14 he served in the Red Army (as a private courier of the 2nd Staraya Russa guard company in June–November 1919), but was soon discharged due to his early age. In May 1920-September 1921 he was a clerk of the military commandant, District Police Department, Staraya Russa; in September 1921-May 1922 he was a secretary of the military commissar of the communications battalion of the 56th rifle division. In May 1922, he was hired by the GPU of the USSR in the office of the authorized representative for the Staro-Russky district. Until 1928, he was an employee of the Novgorod provincial department of the GPU, the Pskov provincial department of the GPU, and an employee of the GPU in the city of
Porkhov. He was a member of the All-Union Communist Party (bolsheviks) since 1927 (member of the Komsomol in 1921-1929). In 1928-1929, he was a cadet at the Higher Border School of the OGPU; then an authorized representative of the special department of the
Leningrad Military District division. From October 1929 - in the central office of the OGPU of the USSR (counterintelligence agencies and the Special Department): authorized representative of the 1st department of the KRO OGPU of the USSR (10.1929-9.1930); authorized representative of the Special. Bureau of the Special Department of the OGPU of the USSR (09.1930 −04.1931); authorized representative of the 2nd department of the Special Department of the OGPU of the USSR (04.-09.1931); operative authorized representative of the 3rd department of the Special Department of the OGPU of the USSR (09.1931 - 01.1933); employee for special assignments of the Special Department of the OGPU of the USSR (01.-06.1933); assistant to the chief of the 3rd department of the Special Department of the OGPU of the USSR (01.06.1933-15.01.1934); deputy chief of the 3rd department of the Special Department of the OGPU of the USSR (15.01.-10.07.1934); After the formation of the NKVD of the USSR, from July 1934 - Deputy Chief of the 7th Department of the Special Department of the GUGB NKVD (10.07.1934-16.05.1935); then Chief of the 11th Department of the Special Department of the GUGB NKVD (16.05.1935-12.1936). From December 1936 in the Counterintelligence (3rd) Department of the GUGB NKVD USSR: Chief of the 3rd (Polish) Department of the 3rd Department of the GUGB NKVD USSR (12.1936-01.09.1937); simultaneously from 01.08. to 01.09.1937 - assistant to the head of the 3rd Department of the GUGB A. M. Minaev-Tsikanovsky. Deputy Chief of the 3rd Department of the GUGB NKVD USSR (Minaev-Tsikanovsky) (01.09.1937-28.03.1938). Conducted "investigations" of a number of well-known individuals from among the leaders of the Communist Party of Poland (Yu. M. Leszczynski-Lenski, M. A. Loganovsky, etc.), which ended with their execution. As the head of the Polish department of the 3rd department of the GUGB NKVD of the USSR, he bears full responsibility for conducting the "Polish operation" of the NKVD in 1937-1938, mass arrests, torture and executions of Soviet citizens of Polish nationality and natives of the Kingdom of Poland. As an assistant and deputy head of the 3rd department of the NKVD of the USSR Minaev-Tsikanovsky, along with him, V. F. Grigoriev, S. G. Volynsky, A. D. Davydov, I. S. Naidman and others, he bears responsibility for conducting national operations of the NKVD throughout the territory of the USSR and the mass murders of "persons of counter-revolutionary nationality" through album sentences of the Commission of the People's Commissar of the NKVD and the Prosecutor of the USSR and local "troikas" of the NKVD Directorate, as well as Stalin's execution lists. On March 28, 1938, he was appointed head of the 5th (Foreign) Department of the 1st Directorate of the NKVD of the USSR; from September 29, 1938, he was head of the 5th Department of the GUGB NKVD of the USSR. As the head of foreign intelligence of the NKVD, he was responsible for the arrests of a number of Soviet intelligence officers, which he initiated and sanctioned (B. Ya. Bazarov, Ya. Ya. Vitolin-Orlov, I. G. Gert, I. I. Gertsenberg, I. I. Kvetkov, I. A. Markov, brothers Azariy and Avakim Mnatsakanov, Kh. Ya. Reif, Yu. Ya. Tomchin, F. S. Fridman, E. Ya. Furman, and others). == Downfall ==