Auñón-Chancellor was hired by NASA as a flight surgeon and spent over nine months in Russia supporting medical operations for International Space Station astronauts.

[7] In June 2012, Auñón piloted a DeepWorker 2000 submersible as part of the NASA/NOAA NEEMO 16 underwater exploration mission off Key Largo, Florida.

[11] In January 2020, she released a study on an unnamed astronaut who had to treat their own deep vein thrombosis on the International Space Station.

[12] In 2021, Russian state-owned news service TASS published accusations from an anonymous source claiming that it was Auñón-Chancellor who was suffering from the deep vein thrombosis that she published her paper about in 2020 and that it provoked an acute psychological crisis (emotional breakdown) in space during Expedition 56 and in late August 2018, in an effort to return to Earth, sabotaged the Soyuz MS-09 spacecraft by drilling a hole into its orbital module.

[13] The accusation was denied by NASA and officials say they knew the precise locations of the US astronauts before the leak occurred and at the moment it began.

[15][16] It also came weeks after a particularly embarrassing moment for Roscosmos; during the docking of the Nauka module its engines kept firing causing the entire space station to flip over one and a half times.

[23] Auñón-Chancellor has received the following awards and honors:[24] This article incorporates public domain material from websites or documents of the National Aeronautics and Space Administration.