Born in 1966 in the town of Bataisk (the Rostov region). Graduated from Gubkin Russian State University of Oil and Gas with a Degree in Economics and Management of oil and gas enterprises. Also, got a Degree in Economics at International Management Institute and a Post-graduate Degree at the Russian Presidential Academy of National Economy and Public Administration.
Oleg Sienko started his career in 1988 in Irkutsk as an instructor of the “Youth Initiative of Irkutsk” association, forming a part of the City Committee of Komsomol.
In 2002, he was appointed Director General at OOO Gazexport, a subsidiary of Gazprom that was responsible for gas supplies to Europe.
In 2003, Oleg Sienko was appointed Deputy Chairman of the Board – Head of Strategic Development and Corporate Management Division at OAO NGK Intera.
From 2009 to 2017, he was Director General at OAO “Scientific Production Corporation «Uralvagonzavod» (Nizhniy Tagil).
Oleg Sienko joined Russian Copper Company in February 2018, in the position of First Vice President he is responsible for federal government relations.
Oleg Sienkohas been awarded the Order of Honour, IV Class Order “For Merit to the Fatherland”, II class medal of the Order “For Merit to the Fatherland”, medal for “Excellence in Service in Ground Forces”. He also got a Certificate of Gratitude from the President of the Russian Federation, Certificate of Honour from the President of the Russian Federation, Honorary Title "Honoured Industrial Engineer" and a number of ministerial awards.