The Post’s search for an executive editor, led by Mr. Ryan, started at the end of January, when Mr. Baron gave a month’s notice, saying, “At age 66, I feel ready to move on.” Mr. Bezos met with final candidates in recent days, and Ms. Buzbee said she had an interview with him in Washington before signing on for the job.

“Every indication I’ve gotten, everything I’ve seen, is that he believes in the importance of an independent newsroom,” Ms. Buzbee said of Mr. Bezos in an interview on Tuesday.

She said it was “a huge honor” to be the first woman to lead The Post’s newsroom.

“Every day when I work, I am conscious of the women who came before me in this profession that we love so much and who broke down so many barriers,” Ms. Buzbee said. “And I am grateful to them pretty much every day of my life, because I know that it took work and guts, and I really do feel that they paved the way for things that are happening now.”

Ms. Buzbee was also considered this year for the top newsroom job at The Los Angeles Times, which went this month to ESPN’s Kevin Merida, a former managing editor of The Post.

She was born in Walla Walla, Wash., and grew up in the Bay Area and the suburbs of Dallas and Kansas City. She graduated from high school in Olathe, Kan., before getting a journalism degree at the University of Kansas and an M.B.A. from Georgetown University.

Her husband, John Buzbee, a Foreign Service officer and Middle East specialist, died in 2016. Her father-in-law, Richard Buzbee, who died in 2018, was the publisher and editor of The Hutchinson News and Olathe Daily News in Kansas.

Ms. Buzbee, who has been working out of New York, will move to Washington when she takes the Post job. The A.P. said in a statement that it would start a search for her successor immediately. The A.P.’s president and chief executive, Gary Pruitt, said in a statement that Ms. Buzbee had been “an exceptional leader.”

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