Nikolai Yezhov
In the fall of 1938, he was made acting director of the Foreign Department of the NKVD (as the OGPU had by then become) after the purging of the previous head, during the Great Purges, which later culminated in the fall of Nikolai Yezhov (who was eventually replaced by Lavrentiy Beria). Shortly afterward, Sudoplatov narrowly escaped being purged himself.