Jennifer Sidey-Gibbons hails from Calgary, Alberta. She holds an honors bachelor's degree in mechanical engineering from McGill University in Montreal and a doctorate in engineering from the University of Cambridge. While at McGill, she conducted research on flame propagation in microgravity, in collaboration with CSA and the National Research Council Flight Research Laboratory. Prior to joining CSA, Sidey-Gibbons worked as an assistant professor in combustion in the Department of Engineering at Cambridge.

Nikolay Vladimirovich Tikhonov (Russian: Николай В. Тихонов) was born May 23, 1982. He is a former Russian cosmonaut, selected in 2006. He was selected as a backup flight engineer for Soyuz MS-02. He was made a prime crew member of Soyuz MS-04 but, due to Russian budget cuts, the crews were changed and Tikhonov was then slated to make his first spaceflight on the Soyuz MS-10 spacecraft. He was again removed from the manifest due to delays in launching the Russian Nauka module. He was scheduled to fly into space as commander of the Soyuz MS-15 mission, although he was removed for a third time following the aborted launch of Soyuz MS-10, and the subsequent crew changes that followed. He was then scheduled to finally make his first flight onboard Soyuz MS-16 in 2020. However he reportedly got an eye injury a month before the launch, was replaced on the flight, and subsequently left the cosmonaut corps due to health issues.

Andrei Nikolaevich Babkin (Russian: Андре́й Никола́евич Ба́бкин) is a Russian Engineer and Cosmonaut who was selected in April 2010.

Ivan Viktorovitch Vagner is a Russian Engineer and Cosmonaut who was selected in October 2010. He graduated from the Baltic State Technical University in 2008, before working as an engineer for RKK Energia.

Sergey Vladimirvich Kud-Sverchkov Is a Kazakh-Russian engineer and cosmonaut selected in 2010.

Joseph Albert Walker was an American World War II pilot, experimental physicist, NASA test pilot, and astronaut. He was one of twelve pilots who flew the North American X-15, an experimental spaceplane jointly operated by the Air Force and NASA.

Anna Yuryevna Kikina is a Russian engineer and test cosmonaut, selected in 2012. Kikina is assigned to Crew-5 mission which is to launch in 2022. The seat was arranged as a part of exchange agreement between Roscosmos and NASA, allowing Russian cosmonaut to fly on US vehicle while American astronaut gets a seat on Soyuz. Kikina will be the first Russian cosmonaut to fly on Crew Dragon.

Dubrov was selected by Roscosmos as a cosmonaut on 8 October 2012, as one of eight cosmonauts selected as part of Roscosmos's 2012 selection group. In 2020 he was assigned to the backup crew of Soyuz MS-17, backing up Russian cosmonaut Sergey Kud-Sverchkov as Flight Engineer on ISS Expedition 63/64

Sergey Vladimirovich Korsakov is a Russian cosmonaut selected by Roscosmos in 2012. He is scheduled to make his first flight into space in April 2021 as a flight engineer aboard Soyuz MS-18 ahead of a six month stay aboard the International Space Station.

Selected as astronaut in 2012. By the decision of the Interdepartmental Commission for the Selection of Cosmonauts, he was approved as Flight Engineer-2 of the backup crew of the Soyuz MS-18 and, accordingly, of the Soyuz MS-19 prime crew.

Maurer applied to the European Space Agency as an astronaut in 2008, but was not initially appointed to the European Astronaut Corps. He formally joined the European Astronaut Corps in July 2015. In March 2018, he gained certification to perform International Space Station-related spacewalks in the American spacesuit EMU. In 2018 he also successfully graduated from both basic astronaut training and pre-assignment training and thus became fully certified to go to space. On 28 July 2020, Maurer was announced as a backup for Thomas Pesquet for the ISS expedition 65. His own flight is scheduled to take place no earlier than September 2021 aboard SpaceX Crew-3.

Larry Connor is an American real estate and technology entrepreneur.