Department of Economic Security Director Clarance Carter submitted his letter of resignation to Governor Ducey.
He will officially step down on Friday.
A lot of people had been calling for Carter's resignation during the controversy surrounding Child Protective Services.
It was under his watch that some 6,000 complaints to a child abuse hotline went uninvestigated.
Former Governor Brewer did not fire him, but did mandate changes including a new department the Department of Child Safety be created.