Administrator of NASA

The administrator of the National Aeronautics and Space Administration is the highest-ranking official of NASA, the national space agency of the United States. The administrator is NASA's chief decision maker, responsible for providing clarity to the agency's vision and serving as a source of internal leadership within NASA. The office holder also has an important place within United States space policy, and is assisted by a deputy administrator.

The administrator is appointed by the president of the United States, with the advice and consent of the United States Senate, and thereafter serves at the president's pleasure. Jared Isaacman has served as the administrator since December 18, 2025.

Duties and responsibilities

The administrator serves as NASA's chief executive officer, accountable to the president for the leadership necessary to achieve the agency's mission. This leadership requires articulating the agency's vision, setting its programmatic and budget priorities and internal policies, and assessing agency performance.

History

The first administrator of NASA was Dr. T. Keith Glennan; during his term he brought together the disparate projects in space development research in the US. Glennan presided over an organization that had absorbed the earlier National Advisory Committee for Aeronautics (NACA) intact; its 8,000 employees, an annual budget of $100 million, and three major research laboratories—Langley Aeronautical Laboratory, Ames Aeronautical Laboratory, and Lewis Flight Propulsion Laboratory—and two small test facilities made up the core of the new NASA. Within a short time after NASA's formal organization, Glennan incorporated several organizations involved in space exploration projects from other federal agencies into NASA. He brought in part of the Naval Research Laboratory and created the Goddard Space Flight Center. He also incorporated several disparate satellite programs, two lunar probes, and the research effort to develop a million pound force (4.4 MN) thrust, single-chamber rocket engine from the U.S. Air Force and the U.S. Department of Defense's (DOD) Advanced Research Projects Agency. In December 1958 Glennan also acquired control of the Jet Propulsion Laboratory, a contractor facility operated by the California Institute of Technology. In 1960, Glennan obtained the transfer to NASA of the Army Ballistic Missile Agency, located at Huntsville, Alabama, and renamed it the Marshall Space Flight Center.

The second administrator, James E. Webb, served from 1961 to 1968, from the beginning of the Kennedy administration through the end of the Johnson administration, thus overseeing each of the critical first crewed missions throughout the Mercury and Gemini programs until days before the launch of the first Apollo mission. He also dealt with the Apollo 1 fire. During Webb's administration, NASA developed from a loose collection of research centers to a coordinated organization. He had a key role in creating the Manned Spacecraft Center, later the Johnson Space Center, in Houston. Despite the pressures to focus on the Apollo program, Webb ensured that NASA carried out a program of planetary exploration with the Mariner and Pioneer space programs. Webb was an early champion of space telescopes, like the one that would later bear his name. Encouraged by Kennedy and Johnson, Webb made racial integration a priority for the agency. NASA publicly supported the Civil Rights Act of 1964 and initiated a series of innovative programs aimed at increasing black participation including specifically targeting black colleges and schools with recruitment programs.

The only person to hold the post twice is James C. Fletcher. During his first administration at NASA, Fletcher was responsible for beginning the Space Shuttle effort, as well as the Viking program that sent landers to Mars. He oversaw the Skylab missions and approved the Voyager space probes and the Apollo–Soyuz Test Project. He returned to NASA following the Challenger disaster.

Daniel Goldin held the post for the longest term (nearly 10 years), and is best known for pioneering the "faster, better, cheaper" approach to space programs.

The current administrator is entrepreneur and philanthropist Jared Isaacman, who was nominated by President Donald Trump on November 5, 2025. He replaced Sean Duffy, who served as acting administrator from July 9, 2025 to December 17, 2025. Jared Isaacman was nominated by Trump (while he was president-elect) on December 4, 2024, but his nomination was withdrawn on May 31, reportedly because of his connections to Elon Musk and donations towards Democratic, anti-Trump politicians.

List of administrators

Status

Line of succession

The line of succession for the administrator of the National Aeronautics and Space Administration is as follows:

1. Deputy Administrator of NASA
2. Associate administrator of NASA
3. Chief of staff of NASA
4. Director of Johnson Space Center (Houston, Texas)
5. Director of Kennedy Space Center (Merritt Island, Florida)
6. Director of Marshall Space Flight Center (Redstone Arsenal, Alabama)

In the event of there being no deputy administrator of NASA, the associate administrator will serve as acting administrator.

See also

• Chairmen of the National Advisory Committee for Aeronautics
• NASA Chief Scientist