Oleg Platonov

Oleg Vladimirovich Platonov was born on June 27, 1986, in Chelyabinsk, in what was then the Russian republic of the Soviet Union. He pursued a military-aviation career, graduating from the Krasnodar Higher Military Aviation School of Pilots in October 2008 with an engineering degree in aircraft operation and air-traffic management. Commissioned as a pilot in the Russian Air Force, he served from 2008 to 2018, advancing from pilot to senior pilot and eventually taking command of an aviation unit within the 22nd Guards Fighter Aviation Regiment. In 2018 Roscosmos selected him for its cosmonaut corps as part of the Group 17 selection, and after completing basic training he qualified as a test cosmonaut. Fluent in Russian and English, Platonov spent years preparing for a first flight that would ultimately arrive by an unexpected route.

Platonov had originally been assigned to launch on a Soyuz spacecraft, in line with the traditional path for Russian cosmonauts reaching the International Space Station. Under the integrated NASA-Roscosmos seat-swap agreement, which places a cosmonaut on U.S. commercial-crew vehicles and an American on Soyuz to ensure both nations always have crew aboard the station, his assignment was redirected to SpaceX Crew-11. That meant his first spaceflight came aboard a wholly different vehicle than the one he had trained on for years. On August 1, 2025, Platonov launched as a mission specialist aboard the Crew Dragon Endeavour alongside commander Zena Cardman, pilot Mike Fincke, and JAXA's Kimiya Yui, becoming part of Expeditions 73 and 74. He conducted research and station operations for 167 days before the crew returned earlier than planned, splashing down in the Pacific on January 15, 2026 after a crewmate's medical event led NASA to order its first medical evacuation from the station.

That single mission gives Platonov roughly 167 days and about 4,000 hours in space, with no spacewalks on his first flight. His story is a small but telling example of how international cooperation continues to shape human spaceflight even amid geopolitical tension on the ground: a Russian Air Force pilot trained for Soyuz who instead flew on an American commercial capsule, seated beside American and Japanese crewmates. That the seat-swap held through a mission cut unexpectedly short says something about how deeply the two programs remain intertwined in low Earth orbit. An active member of the Roscosmos cosmonaut corps, Platonov returns to Star City as a newly flight-experienced test cosmonaut, eligible for future assignments and part of the generation carrying Russia's human-spaceflight program forward through an era of shared crews and mixed vehicles.