CHICAGO (AP) — Chicago Mayor Lori Lightfoot says retiring Police Superintendent Eddie Johnson has agreed to stay on the job until the end of the year.

Lightfoot spoke Thursday morning at a news conference in which Johnson announced he was stepping down after more than three years as superintendent and more than three decades with the department.

Lightfoot says she and others in the city will work to “outline a plan for a smooth and orderly transition.” She did not talk about a possible successor.

Lightfoot praised Johnson as a tireless public servant who for more than three decades has known only one employer: the people of the city of Chicago.

Johnson said he has enjoyed his time as superintendent but that it has taken a toll on his health and his family.