Igor Sutyagin

Igor Vyacheslavovich Sutyagin (Russian: И́горь Вячесла́вович Сутя́гин; born 17 January 1965) is a Russian arms control and nuclear weapons specialist. In 1998, he became the head of the subdivision for Military-Technical and Military-Economic Policy at the Institute for US and Canadian Studies of the Russian Academy of Sciences in Moscow, where he worked before he was arrested for treason on accusations he had given information to a British company, although he had no access to classified documentation as a civilian researcher. Sutyagin spent 11 years in prison on espionage charges and was released by Russia in 2010 in exchange for the release of a group of spies arrested in the United States.

As of 2018, Sutyagin is a Research Fellow at the Royal United Services Institute for Defence and Security Studies in London.