чекист

Etymology
From.

Noun

 * 1)  Chekist; an agent of the Cheka, the Soviet Russian secret police from 1917 to 1922, replacing the  secret police of Tsarist Russia; succeeded by the  and NKVD
 * 2)  KGB man, FSB agent; a national security official employed by any of the state security intelligence agencies of the Soviet Union or Russian Federation