NASA astronaut Jonny Kim is set to conclude nearly a decade of service with the agency, with his final day scheduled for Thursday. This period includes a remarkable eight-month scientific expedition aboard the International Space Station (ISS). Following his departure from NASA, Kim will continue his career as a lieutenant commander in the U.S. Navy.
Significant Contributions to Scientific Research
In April 2025, Kim launched to the ISS aboard the Soyuz MS‑27 spacecraft, where he served as a flight engineer during Expeditions 72 and 73. Throughout this mission, he completed an impressive 3,920 orbits around Earth, travelling nearly 104 million miles. His work contributed to a diverse range of scientific studies, encompassing technology development, Earth sciences, biology, and human research vital for future explorations.
NASA Administrator Jared Isaacman remarked, “Jonny Kim embodies the very essence of NASA. He has consistently pushed the boundaries of exploration while inspiring countless individuals. His contributions aboard the International Space Station have advanced essential scientific knowledge that will influence NASA’s future missions for many years ahead. We are deeply appreciative of his commitment to our nation and the quest for knowledge, and we wish him every success in his continued service in the U.S. Navy.”
Leadership and Achievements in Space Operations
During the latter half of Expedition 73, Kim took on the role of U.S. Operating Segment lead, overseeing operations across the international modules of the ISS. This expedition marked a historic achievement as every available docking port was occupied for the first time in 25 years. Additionally, Kim commanded the Canadarm2 robotic arm, successfully capturing Northrop Grumman’s new Cygnus XL spacecraft, which brought 11,000 pounds of supplies to the station. He and his crewmates from Roscosmos safely landed in Kazakhstan in December 2025.
Vanessa Wyche, director of NASA’s Johnson Space Center, commented, “Jonny has played an integral role at NASA, and his profound impact will resonate for generations. From pioneering groundbreaking scientific research to inspiring future generations, he has been a remarkable source of motivation for our nation. His exceptional skills, determination, and resilience will ensure a lasting legacy at NASA.”
A Multifaceted Background and Training
Selected as a NASA astronaut in 2017, Kim underwent two years of rigorous training, which included learning about space station systems, Russian language proficiency, robotics, T-38 flight operations, geology, survival training, and preparation for spacewalks. He subsequently took on the role of capsule communicator, or capcom, within NASA’s Mission Control Centre and contributed to the Artemis programme by leading astronaut crew operations and serving as increment lead for Expedition 65.
His background as a Navy SEAL, physician, and naval aviator provided him with unique insights that greatly benefited mission operations and crew support. Scott Tingle, chief of the Astronaut Office at NASA Johnson, stated, “Jonny approached every task with humility, precision, and unwavering dedication to the mission. His blend of medical training, operational expertise, and engineering knowledge has strengthened our team and fostered advancements in exploration and space station operations.”
A Distinguished Military and Academic Career
Born in Los Angeles, Kim enlisted in the U.S. Navy after completing high school in 2002. He trained as a hospital corpsman and successfully completed Basic Underwater Demolition/SEAL training, subsequently joining SEAL Team Three. Over his career, he participated in more than 100 combat operations, serving in roles such as medic, sniper, navigator, and point man, earning the Silver Star, Bronze Star with Combat “V,” and numerous commendations.
He holds a bachelor’s degree in mathematics from the University of San Diego and a Doctor of Medicine from Harvard Medical School, completing his internship at Massachusetts General Hospital and Brigham and Women’s Hospital in Boston. Additionally, Kim is a dual-designated naval aviator and flight surgeon, having completed flight training at Naval Air Stations in Texas and Florida, as well as aerospace medical training at the Naval Aerospace Medical Institute in Pensacola.
Looking Forward to Future Endeavours
As Kim transitions back to active duty within naval aviation training, he reflects on his time at NASA, stating, “Contributing to space exploration and serving NASA has been the honour of a lifetime. Throughout my career, I’ve discovered that beyond the missions and the technology, success ultimately hinges on the people involved. They are our most valuable asset, and leading with love and empathy is essential to achieving the extraordinary. I eagerly anticipate bringing my commitment to service, my enduring passion for space and technology, and the hard-earned lessons from this past decade into the next chapter of my journey, making a significant impact on humanity’s future.”
For further information about NASA’s astronauts and human space exploration, please visit: https://www.nasa.gov/astronauts.
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