Oleg Yesayan (Armenian: Օլեգ Եսայան; born 12 November 1946) is an Armenian politician and diplomat and is the current Ambassador of Armenia to Russia, presenting his credentials to Russian President Dmitry Medvedev on 5 February 2010.Yesayan is a former Prime Minister of Nagorno-Karabakh, Speaker of the National Assembly of Nagorno-Karabakh, Chairman of the Securities Commission of Armenia and Ambassador to Belarus.