Keller served in the position for eight years; he will continue to contribute regular pieces to the publication.
“It’s been a privilege to work alongside the world’s finest journalists during these exhilarating years of tumult and transformation,” said Keller.
“I wanted to move on when the newsroom felt strong in its journalism and secure in its future. It feels that way now, and with Jill as executive editor, it could not be in better hands.”
Jill Abramson has served as The Times’ managing editor for the past eight years, and before that was the paper’s Washington bureau chief.
Also making a move is Dean Baquet, who was named managing editor at The Times.