https://en.wikipedia.org/wiki/Ministry_of_State_Security_(Soviet_Union)

Ministerstvo gosudarstvennoy bezopasnosti

Министе́рство госуда́рственной безопа́сности

Viktor Semyonovich Abakumov 1946–1951
Semyon Denisovich Ignatyev 1951–1953
Lavrenti Pavlovich Beria Mar-Jun 1953
Sergei Nikiforovich Kruglov 1953–1954