A three-person crew launched on Soyuz TM-31 and began the first long-duration stay on the International Space Station (ISS). Expedition 1 was commanded by NASA astronaut William M. Shepherd, establishing the commander role and the pattern of rotating crews. Their arrival marked the start of uninterrupted human presence on the ISS.
As Expedition 1 ended, command passed to Expedition 2 commander Yury Usachyov. This handover showed that the ISS could support back-to-back crews while keeping operations and safety responsibilities clearly assigned. The station remained continuously crewed through the transition.
Frank Culbertson assumed command as the ISS continued building out its early U.S. and Russian segments. Early expeditions focused heavily on activating systems, maintaining life support, and preparing the station for more complex science and assembly work. Regular command handovers helped stabilize long-duration operations.
Kenneth Bowersox assumed command as the ISS faced a major program shock: the Space Shuttle Columbia disaster occurred during Expedition 6. With shuttle flights paused, the station had to rely more on Russian Soyuz and Progress spacecraft for crew transport and supplies. The commander role remained central for managing safety and continuity through this disruption.
Peggy Whitson assumed command during Expedition 16, becoming the first woman to lead the ISS. Her expedition overlapped with major station assembly work, reflecting a period when the ISS was expanding into a larger, more capable laboratory. This was also a milestone for leadership diversity in long-duration spaceflight.
Frank De Winne became the first European commander of the ISS after Gennady Padalka departed, marking a new level of international leadership in station operations. The change highlighted how the ISS partnership had matured beyond U.S.-Russian command leadership. De Winne led Expedition 21 as the station continued operating with larger, multinational crews.
Dmitry Kondratyev commanded Expedition 27 during a period when six-person ISS crews were standard, allowing more time for research alongside maintenance. Routine command rotations supported stable operations even as different vehicles and partners delivered crew and cargo. This era set the operational rhythm that later supported commercial crew flights.
Oleg Kotov commanded Expedition 38 as commercial cargo resupply became a more regular part of station logistics. This period included important maintenance events, including work related to the station’s cooling systems. Expanding cargo options strengthened ISS resilience by reducing dependence on a single supply provider.
Shane Kimbrough assumed command during a formal change-of-command ceremony, illustrating the continuing tradition of a clear handoff of authority. By this time, ISS operations depended on a steady cadence of international crew and cargo vehicles. Expedition 50 continued long-duration research and station maintenance as a mature, full-scale laboratory.
Oleg Kononenko served as commander during Expedition 59, one of several times he held the station’s top onboard leadership role. Expedition 59 continued a mix of human research and technology demonstrations, reflecting the ISS focus on science with direct relevance to long missions. Regular commander rotations helped maintain consistent safety oversight despite shifting crew mixes.
Chris Cassidy assumed command during Expedition 63, continuing the established change-of-command process used to transfer responsibility for crew safety and station operations. This period showed how the ISS could maintain leadership continuity while vehicles and personnel rotated. The commander role remained a key part of coordinating a multinational team in orbit.
Andreas Mogensen began Expedition 70 as commander, reflecting how international partners continued to share leadership as SpaceX Crew Dragon missions regularly ferried crews. NASA’s expedition structure supported a larger, rotating set of astronauts and cosmonauts living and working on the station at the same time. This helped sustain research output while continuing routine maintenance and visiting-vehicle operations.
Oleg Kononenko took over command during the late phase of Expedition 70, continuing into Expedition 71 as crew rotations shifted the expedition number. Command handovers like this help keep authority aligned with who remains onboard after vehicles depart. This transition also showed how expeditions can change without the station ever being uncrewed.
Suni Williams assumed command as Expedition 72 began, following a major crew departure that also ended Expedition 71. This handover demonstrated the ISS practice of transferring leadership when visiting spacecraft undock and the onboard team changes. By late 2024, the station remained a long-running example of continuous multinational operations and rotating commanders.
International Space Station Expeditions: Crew Rotations and Commanders (2000–2024)