Gleb Karakulov () is a Russian engineer and defector who attained the rank of captain in a field unit of the presidential communications department of the secretive FSO.Former security officer tells of president’s strict quarantine and says he has ‘lost touch with the world’ Andrew Roth and Pjotr Sauer, The Guardian, April 5, 2023Elite Putin security officer Gleb Karakulov, who defected, says the Russian president is 'a war criminal' ABC News He was responsible for establishing secure communications for the Russian president and prime minister.

On 14 October 2022, Karakulov flew with his wife and daughter to Turkey. He is in hiding with his family, and is one of the highest-ranking Russians to defect over the Russian invasion of Ukraine.Insider with Putin's secretive security service defects from Russia, blasts former boss as 'war criminal' Caitlin McFall, Fox News, April 5, 2023

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