Sergei Tretyakov
Russian intelligence officer who defected to the United States
About Sergei Tretyakov
Lived 1956 – 2010 (aged 53). Sergei Tretyakov was a double agent.
Colonel Sergei Olegovich Tretyakov (Russian: Сергей Олегович Третьяков; 5 October 1956 – 13 June 2010) was a Russian SVR (foreign intelligence) officer, who defected to the United States in October 2000.
Intelligence career Born 5 October 1956 in Moscow,
He was reported to have been close to Sergey Lavrov, Russia's UN mission head.
Defection In October 2000, Tretyakov disappeared with his wife, daughter, and cat. He told the SVR, in a statement, "My resignation will not harm the interests of the country." It was not until the end of January 2001 that his defection was first reported by the Associated Press. The news was then broken in the Russian media, which reported that Russia's Foreign Ministry was insisting on having a consular meeting with him to make sure he was not being forcibly kept by the US side.
On 10 February 2001, it was revealed, with reference to "several American officials familiar with the case," that the defector "was in fact an officer in the S.V.R., Russia's foreign intelligence service, successor to the Soviet-era K.G.B." The timing of his decision was reportedly partly affected by the death of his mother in 1997, the last close family member still living in Russia the state could threaten.
He also claimed then that the chief motivation for his defection had been his "growing disgust with and contempt for, what was happening in Russia," he said: "I saw with my own eyes what kind of people were governing the country. I arrived at the irrevocable conclusion that to serve those people is immoral, I wanted nothing to do with them." When promoting his book, Tretyakov said that Russian intelligence was just as active now as in Cold War times, adding that he hoped his book would act as a "wake-up call" to Americans. "The KGB was responsible for creating the entire nuclear winter story to stop the Pershing II missiles." Tretyakov says that two fraudulent papers about global cooling were commissioned by the KGB but never published, one supposedly by physicist Kirill Kondratyev about dust storms in the Karakum Desert, the other supposedly by climatologist Georgii Golitsyn and mathematicians Nikita Moiseyev and Vladimir Alexandrov about dust storms after a nuclear war. Tretyakov says that the KGB distributed fake findings to "their contacts in peace, anti-nuclear, disarmament, and environmental organisations in an effort to get these groups to publicize the propagandists' script." which carried a key article on the topic, "The atmosphere after a nuclear war: Twilight at noon," in 1982. Tretyakov says that from 1979, the KGB wanted to prevent the US from deploying Pershing missiles in Western Europe and, directed by Yuri Andropov, they used the Soviet Peace Committee, a government organization, to organize and finance demonstrations in Europe against US bases. Two chiefs of Vladimir Putin's Federal Protection Service (FSO), Viktor Zolotov and General Murov, discussed how to kill the former director of Yeltsin's administration Alexander Voloshin. They also made "a list of politicians and other influential Muscovites whom they would need to assassinate to give Putin unchecked power." However, since the list was very long, Zolotov allegedly announced, "There are too many. It's too many to kill – even for us." An SVR officer who told about that story felt "uneasy" because FSO includes 20,000 troops and controls the "black box" that can be used in the event of nuclear war. Disinformation over the Internet. He often sent SVR officers to branches of New York Public Library where they got access to the Internet without anyone knowing their identity. They placed propaganda and disinformation to various web sites and sent it in e-mails to US broadcasters.
Death and allegations of foul play Although Tretyakov died on June 13, 2010, his death was not announced until July 9, 2010. Tretyakov's wife cited cardiac arrest as the probable cause of death and strongly denied the foul play speculations voiced in the media but called his death quite unexpected. According to the Florida medical examiner's report, Tretyakov died after choking to death on a piece of meat; a cancerous tumor was also found in his colon.
Some Russian commentators construed Russia's Prime Minister Vladimir Putin's comments about the ultimate fate that is bound to befall "traitors" made on July 24, 2010, while he was talking to reporters about the members of the 'Illegals Program', as a thinly veiled allusion to Tretyakov's death.
Don’t just read it —
keep it.
Full-length biographies made to live with: read them, listen on the way to work, watch them tonight.
- E-book
- Audio
- Video
Instant download · yours to keep · every purchase keeps this site free
Important facts
People in Sergei Tretyakov's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Sergei Tretyakov's
Frequently asked questions
Who was Sergei Tretyakov?
Russian intelligence officer who defected to the United States (1956–2010)
When was Sergei Tretyakov born?
Sergei Tretyakov was born on 5 October 1956.
When did Sergei Tretyakov die?
Sergei Tretyakov died on 13 June 2010.
What was Sergei Tretyakov's occupation?
Sergei Tretyakov was a double agent.
Sources & further reading
· DBpedia: Sergei Tretyakov (intelligence officer)
Cite this page
APA: Biography.guide. (2026). Sergei Tretyakov. https://biography.guide/sergei-tretyakov-double-agent/
MLA: "Sergei Tretyakov." Biography.guide, https://biography.guide/sergei-tretyakov-double-agent/.
Chicago: "Sergei Tretyakov." Biography.guide. https://biography.guide/sergei-tretyakov-double-agent/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
Page generated 2026-09-27 05:15 UTC