His parents, Yuri Semyonovich Kondratyev and Valentina Dmitriyevna Kondratyeva (née Zaozyornova), reside in Alma-Aty, Kazakhstan.

In 2000, Kondratyev graduated from the Moscow State University for Economy, Statistics and Computer Science (MESI), Economic Information Systems Department as an economist.

Kondratyev was then assigned to the ISS Expedition 13 long duration mission prime crew and trained as ISS Flight Engineer and Soyuz Commander for one and a half year until the crew reassignment named ESA astronaut Thomas Reiter.

In March 2007 Kondratyev received his U.S. Federal Aviation Administration (FAA) Private Pilot License.

Kondratyev participated in two spacewalks during his stay aboard the space station as an Expedition 26 and 27 Flight Engineer and Commander.

[3] During the first spacewalk (Russian EVA #27) conducted on 21 January 2011 Kondratyev and cosmonaut Oleg Skripochka focused to complete installation of a new high-speed data transmission system.

On 16 February 2011, Kondratyev and cosmonaut Skripochka participated in a spacewalk (Russian EVA #28) outside the space station.

This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.