Dan Hartman, NASA Deputy Space Station Program Manager, speaks during the State Commission meeting to approve the Soyuz launch of Expedition 51 to the International Space Station, Wednesday, April 19, 2017, at the Cosmonaut Hotel in Baikonur, Kazakhstan. The mission is set to launch April 20 from the Baikonur Cosmodrome. Photo Credit: (NASA/Aubrey Gemignani)

NASA Deputy International Space Station Program Manager Dan Hartman, left, NASA Director for Human Space Flight Programs, Russia, Chad Rowe, and NASA Interpreter Evgeny Sokol, right, wait at the Zhezkazgan, Kazakhstan Airport to support the Soyuz landing of Expedition 55 crew members Anton Shkaplerov of Roscosmos, Scott Tingle of NASA, Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) Sunday, June 3, 2018. Shkaplerov, Tingle, and Kanai are returning after 168 days in space where they served as members of the Expedition 54 and 55 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

NASA Deputy International Space Station Program Manager Dan Hartman, left, NASA astronaut and Astronaut Office Representative Shannon Walker, center, and NASA Director for Human Space Flight Programs, Russia, Chad Rowe attend a NASA, Roscosmos, and Russian Search and Recovery Forces meeting to discuss the readiness for the landing of the Expedition 56 crew, Tuesday, Oct. 2, 2018. Expedition 56 crew members Drew Feustel and Ricky Arnold of NASA, along with Oleg Artemyev of Roscosmos are returning after 197 days in space where they served as members of the Expedition 55 and 56 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

NASA Director for Human Space Flight Programs, Russia, Chad Rowe, left, and NASA Deputy International Space Station Program Manager Dan Hartman, right, are seen along with other NASA, Roscosmos, and JAXA team members during a meeting to discuss the readiness for the landing of Expedition 55 crew members Anton Shkaplerov of Roscosmos, Scott Tingle of NASA, Norishige Kanai of the Japan Aerospace Exploration Agency (JAXA) Saturday, June 2, 2018. Shkaplerov, Tingle, and Kanai are returning after 168 days in space where they served as members of the Expedition 54 and 55 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

Dan Hartman is a global leader in human spaceflight with a storied 29-year career at NASA. He was the first program manager for Gateway. Dan retired from NASA in 2023.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, Dan Hartman, NASA deputy manager of the International Space Station Program, speaks to media at a post-launch news conference following the liftoff of SpaceX CRS-12, a commercial resupply services mission to the International Space Station. SpaceX CRS-12 lifted off atop a Falcon 9 rocket from Kennedy's Launch Complex 39A at 12:31 p.m. EDT.

In the Kennedy Space Center’s Press Site auditorium, Dan Hartman, NASA deputy manager of the International Space Station Program, speaks to members of the media during a prelaunch news conference for the SpaceX CRS-12 commercial resupply services mission to the International Space Station. A Dragon spacecraft is scheduled to be launched from Kennedy’s Launch Complex 39A on Aug. 14 atop a SpaceX Falcon 9 rocket on the company's 12th Commercial Resupply Services mission to the space station.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, Dan Hartman, NASA deputy manager of the International Space Station Program, speaks to media at a post-launch news conference following the liftoff of SpaceX CRS-12, a commercial resupply services mission to the International Space Station. SpaceX CRS-12 lifted off atop a Falcon 9 rocket from Kennedy's Launch Complex 39A at 12:31 p.m. EDT.

In the Kennedy Space Center’s Press Site auditorium, agency and industry leaders speak to members of the media at a prelaunch news conference for the SpaceX CRS-10 commercial resupply services mission to the International Space Station. From left are: Dan Hartman, deputy manager for the International Space Station Program at NASA's Johnson Space Center in Texas; and Jessica Jensen, director of Dragon mission management for SpaceX.

In the Kennedy Space Center’s Press Site auditorium, agency and industry leaders speak to members of the media at a prelaunch news conference for the SpaceX CRS-10 commercial resupply services mission to the International Space Station. From left are: George Diller of NASA Communications; Dan Hartman, deputy manager for the International Space Station Program at NASA's Johnson Space Center in Texas; Jessica Jensen, director of Dragon mission management for SpaceX; and Tara Ruttley, associate scientist for the International Space Station Program at Johnson.

Dan Hartman, NASA Deputy Space Station Program Manager speaks during the State Commission meeting held to approve the Soyuz launch of the crew for a five and a half month mission aboard the International Space Station, Tuesday, May 27, 2014 at the Cosmonaut Hotel in Baikonur, Kazakhstan. Expedition 40 Soyuz Commander Maxim Suraev of the Russian Federal Space Agency, Roscosmos, Flight Engineer Alexander Gerst of the European Space Agency, ESA, and Flight Engineer Reid Wiseman of NASA will launch about their Soyuz TMA-13M spacecraft in the early hours of May 29. Photo Credit: (NASA/Joel Kowsky)

In the Kennedy Space Center’s Press Site auditorium, agency and industry leaders speak to members of the media during a prelaunch news conference for the SpaceX CRS-12 commercial resupply services mission to the International Space Station. From left are: Josh Finch of NASA Communications; Dan Hartman, NASA deputy manager of the International Space Station Program, Hans Koenigsmann, vice president of Build and Flight Reliability for SpaceX, and Pete Hasbrook, associate program scientist for the International Space Station Program. A Dragon spacecraft is scheduled to be launched from Kennedy’s Launch Complex 39A on Aug. 14 atop a SpaceX Falcon 9 rocket on the company's 12th Commercial Resupply Services mission to the space station.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, NASA and industry leaders speak to media at a post-launch news conference following the liftoff of SpaceX CRS-12, a commercial resupply services mission to the International Space Station. From left are: Stephanie Martin of NASA Communications, Dan Hartman, NASA deputy manager of the International Space Station Program, and Hans Koenigsmann, SpaceX vice president of Flight and Build Reliability. SpaceX CRS-12 lifted off atop a Falcon 9 rocket from Kennedy's Launch Complex 39A at 12:31 p.m. EDT.

In the Press Site auditorium of NASA's Kennedy Space Center in Florida, NASA and industry leaders speak to media at a post-launch news conference following the liftoff of SpaceX CRS-12, a commercial resupply services mission to the International Space Station. From left are: Stephanie Martin of NASA Communications, Dan Hartman, NASA deputy manager of the International Space Station Program, and Hans Koenigsmann, SpaceX vice president of Flight and Build Reliability. SpaceX CRS-12 lifted off atop a Falcon 9 rocket from Kennedy's Launch Complex 39A at 12:31 p.m. EDT.

NASA and Roscosmos team members, along with Russian Search and Recovery Forces, meet at the Cosmonaut Hotel in Karaganda, Kazakhstan to discuss the readiness for the landing of Expedition 56 Commander Drew Feustel and Flight Engineer Ricky Arnold of NASA, along with Flight Engineer and Soyuz Commander Oleg Artemyev of Roscosmos Tuesday, Oct. 2, 2018. Feustel, Arnold, and Artemyev are returning after 197 days in space where they served as members of the Expedition 55 and 56 crews onboard the International Space Station. Photo Credit: (NASA/Bill Ingalls)

CAPE CANAVERAL, Fla. – In the Kennedy Space Center’s Press Site auditorium, members of news media are briefed on preparations for the launch of the SpaceX CRS-4 mission to resupply the International Space Station. From left are Mike Curie of NASA Public Affairs, Hans Koenigsmann, vice president of Mission Assurance with SpaceX, and Kathy Winters, launch weather officer for the 45th Weather Squadron. Dan Hartman, deputy program manager of the International Space Station Program, participated by telephone. The mission is the fourth of 12 SpaceX flights NASA contracted with the company to resupply the space station. It will be the fifth trip by a Dragon spacecraft to the orbiting laboratory. The spacecraft’s 2.5 tons of supplies, science experiments, and technology demonstrations include critical materials to support 255 science and research investigations that will occur during the station's Expeditions 41 and 42. Liftoff is targeted for an instantaneous window at 2:14 a.m. EDT. To learn more about the mission, visit http://www.nasa.gov/mission_pages/station/structure/launch/index.html Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – In the Kennedy Space Center’s Press Site auditorium, members of news media are briefed on preparations for the launch of the SpaceX CRS-4 mission to resupply the International Space Station. From left are Mike Curie of NASA Public Affairs, Hans Koenigsmann, vice president of Mission Assurance with SpaceX, and Kathy Winters, launch weather officer for the 45th Weather Squadron. Dan Hartman, deputy program manager of the International Space Station Program, participated by telephone. The mission is the fourth of 12 SpaceX flights NASA contracted with the company to resupply the space station. It will be the fifth trip by a Dragon spacecraft to the orbiting laboratory. The spacecraft’s 2.5 tons of supplies, science experiments, and technology demonstrations include critical materials to support 255 science and research investigations that will occur during the station's Expeditions 41 and 42. Liftoff is targeted for an instantaneous window at 2:14 a.m. EDT. To learn more about the mission, visit http://www.nasa.gov/mission_pages/station/structure/launch/index.html Photo credit: NASA/Jim Grossmann

CAPE CANAVERAL, Fla. – In the Kennedy Space Center’s Press Site auditorium, members of news media are briefed on preparations for the launch of the SpaceX CRS-4 mission to resupply the International Space Station. From left are Mike Curie of NASA Public Affairs, Hans Koenigsmann, vice president of Mission Assurance with SpaceX, and Kathy Winters, launch weather officer for the 45th Weather Squadron. Dan Hartman, deputy program manager of the International Space Station Program, participated by telephone. The mission is the fourth of 12 SpaceX flights NASA contracted with the company to resupply the space station. It will be the fifth trip by a Dragon spacecraft to the orbiting laboratory. The spacecraft’s 2.5 tons of supplies, science experiments, and technology demonstrations include critical materials to support 255 science and research investigations that will occur during the station's Expeditions 41 and 42. Liftoff is targeted for an instantaneous window at 2:14 a.m. EDT. To learn more about the mission, visit http://www.nasa.gov/mission_pages/station/structure/launch/index.html Photo credit: NASA/Jim Grossmann

Expedition 39 Flight Engineer Rick Mastracchio of NASA is presented with a box of Karaganda chocolates during a welcome home ceremony, Wednesday, May 14, 2014 at the Karaganda Airport in Kazakhstan. Mastracchio, Expedition 39 Commander Koichi Wakata of the Japan Aerospace Exploration Agency (JAXA), and Soyuz Commander Mikhail Tyurin of Roscosmos landed in their Soyuz TMA-11M spacecraft just a few hours earlier near the town of Zhezkazgan. Wakata, Tyurin and Mastracchio returned to Earth after more than six months onboard the International Space Station where they served as members of the Expedition 38 and 39 crews. Photo Credit: (NASA/Bill Ingalls)