Portland Mayor Ted Wheeler’s chief of staff is taking a new job.

Maurice Henderson will be the new chief operating officer at TriMet, the mass transit agency for the metro area.

In a press release, the mayor praised Henderson as “a trusted friend and an excellent chief of staff.”

“We look forward to his leadership and partnership as the city and TriMet work on shared priorities for the region, ensuring the equitable expansion of the transit system, including the prevention of displacement and shared prosperity in our urban growth,” Wheeler said.

Henderson will remain in the mayor’s office through early July. He begins work for TriMet on July 16.

Spokeswoman Sophia June said Wheeler will be working to identify a new chief of staff in the coming weeks.

Henderson previously served as assistant director for the Portland Bureau of Transportation.

He also worked in Washington, D.C., city government and served as deputy press secretary for former Virginia Gov. Tim Kaine.