Oleg Nikolayevich Ostapenko (Russian: Олег Николаевич Остапенко, Ukrainian: Олег Миколайович Остапенко, born 3 May 1957) is the former director of Roscosmos, the federal space agency, retired Colonel General in the Armed Forces of the Russian Federation, former Deputy Minister of Defence, and former commander of the Aerospace Defence Forces, a position he held from their foundation on 1 December 2011 until his promotion in November 2012.

[1] Ostapenko joined the Soviet Strategic Rocket Forces in 1979 after graduating from the Felix Dzerzhinsky Military Academy, specialising in 'Strategic Missiles, Engines, and Production Equipment'.

[1] In 2004, he was promoted to be First Deputy Chief of Staff of the Russian Space Forces and after undertaking a PhD in military sciences he became the commander of Plesetsk Cosmodrome in 2007.

A year later on 30 June 2008 he was promoted to be commander of the Russian Space Forces replacing Vladimir Popovkin who became a Deputy Defence Minister.

[7] On 10 October 2013, Ostanpenko was discharged from military service and relieved of his post in order to become the General Director of the Russian Federal Space Agency, which would be renamed Roscosmos during his tenure.