After nearly 40 years as a reporter and editor at The New York Times, Susan Chira will depart next month to become the editor in chief of The Marshall Project, a nonprofit news organization that focuses on criminal justice issues.

In her new role, Ms. Chira, a senior correspondent and editor covering gender issues for The Times since 2016 and a member of a team that won a 2018 Pulitzer Prize for coverage of workplace sexual harassment, will succeed Bill Keller.

Mr. Keller, whose own 30-year run at The Times included eight years as the paper’s executive editor, joined The Marshall Project at its founding in 2014. Since then, he has guided it to a bevy of awards, including a Pulitzer Prize and two National Magazine Awards.

Upon Ms. Chira’s arrival, Mr. Keller will become a board member while pursuing teaching opportunities at Princeton University and Sing Sing Correctional Facility in Ossining, N.Y.