Oleh Dubyna (Ukrainian: Оле́г Дуби́на; born 20 March 1959) is a former chairman of the board of the Ukraine's national oil and gas company Naftogaz Ukrainy.
On 15 September 2003 Oleh Dubyna was appointed the First Deputy Secretary of the National Security and Defense Council of Ukraine.
After Dubyna's resignation Prime Minister Mykola Azarov accused him of exceeding his authority during the signing of gas agreements with Russia.
President Viktor Yanukovych has instructed Prosecutor-General Oleksandr Medvedko to take legal actions against people (including Dubyna) who are responsible for the deterioration of financial situation of Naftogaz Ukrainy.
[7] The Kryvorizhstal steel company during Dubyna's tenure (1999 to 2001) as the Director General had sponsored Zelensky's local KVN (a comedy competition) team.