PHOENIX (AP) -- Governor Doug Ducey has appointed Mesa Police Chief Frank Milstead as the next director of the Arizona Department of Public Safety.Milstead replaces Robert Halliday, who was appointed to the post in 2010 by former Gov. Jan Brewer.Milstead has been chief in Mesa since 2010 and oversees 1,250 officers and civilians. He previously was a top official at the Phoenix Police Department, where he worked for 25 years.Halliday became a police officer in Flagstaff in 1971 and joined the DPS two years later. He retired after more than 35 years' service in 2008 and rejoined DPS as director two years later.Ducey spokesman Daniel Scarpinato declined to say Tuesday if Halliday wanted to remain in the job. A DPS spokesman said Halliday was unavailable.© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.