OLYMPIA, Wash. (AP) — The head of Washington's Department of Social and Health Services has announced his resignation after three years at the state's biggest agency.

Secretary Kevin Quigley announced his resignation in an email to staff Tuesday.

Quigley says in the email he told Gov. Jay Inslee he'll resign once a successor has been named and that three years is the right amount of time for him to serve in the role.

The agency runs several state programs including Medicaid, Child Protective Services and mental health and addiction services.

Inslee said in a statement that Quigley has built a data-driven, entrepreneurial culture that has won national recognition for excellence and innovation in multiple service areas.

"He will truly be missed as a key member of my cabinet," Inslee said.