Suni Williams, a renowned NASA astronaut who made history with her extended, unintended mission on the International Space Station due to complications with Boeing’s Starliner, has retired following 27 years of distinguished service.

The space agency confirmed on Tuesday that Williams officially retired at the close of December. Her fellow astronaut on the beleaguered Starliner test mission, Butch Wilmore, also departed from NASA during the previous summer.

Jared Isaacman, NASA Administrator, praised Williams as a “pioneer in human space exploration.”

“Her contributions to science and technology have set the groundwork for the Artemis missions to the Moon and the future journey to Mars. Her remarkable accomplishments continue to motivate future generations to dream ambitiously and challenge the limits of what can be achieved,” he remarked.

A photograph of NASA astronaut Suni Williams during an interview at the Johnson Space Center in Houston on March 31, 2025, captures her legacy. (AP Photo/Ashley Landis, File)

Expressing her gratitude, Williams acknowledged the support of her colleagues throughout her “incredible” 27-year tenure with NASA.

“Anyone who knows me knows that space is my absolute favorite place to be,” Williams said in a statement.

“The International Space Station, the people, the engineering, and the science are truly awe-inspiring and have made the next steps of exploration to the Moon and Mars possible,” she added. “I hope the foundation we set has made these bold steps a little easier.”

Williams and Wilmore spent over 280 days in space after their eight-day mission, which began in June 2024, was derailed when their Boeing Starliner spacecraft encountered technical issues. NASA decided it was unsafe to send the astronauts back on the spacecraft, and it returned to Earth unmanned in September 2024.

NASA’s Boeing Crew Flight Test astronauts Butch Wilmore and Suni Williams pose on June 13, 2024, inside the vestibule between the forward port on the International Space Station’s Harmony module and Boeing’s Starliner spacecraft. (NASA)

A rescue mission, conducted by NASA and SpaceX, helped bring the astronauts home on March 18, 2025.

In the astronauts’ first interview after returning home, Williams told Fox News that she was glad to see President Donald Trump and SpaceX CEO Elon Musk “involved” and “taking notice” of their predicament.

NASA astronaut Suni Williams gestures at NASA’s Kennedy Space Center, on the day of Boeing’s Starliner-1 Crew Flight Test mission on a United Launch Alliance Atlas V rocket to the International Space Station, in Cape Canaveral, Florida, on June 1, 2024. (Reuters/Joe Skipper)

“[It allows them to] understand that our involvement as a country, as a spacefaring nation, is really important throughout the world. It sets an example, and it shows our ability to be able to do the hard things, put people in space, operate in space, work in space, and then bring us back. It’s important, and I appreciate that,” she said.

Williams, a native of Needham, Massachusetts, is also a retired U.S. Navy captain and accomplished helicopter and fixed-wing pilot, having logged more than 4,000 flight hours in 40 different aircraft.

She holds a bachelor’s degree in physical science from the United States Naval Academy and a master’s degree in engineering management from Florida Institute of Technology.