LOS ANGELES, Calif.–Mayor Antonio Villaraigosa appointed City Hall insider Gaye Williams, an advisor to 2013 mayoral contender Austin Beutner, to be his next chief of staff, a mayoral aide confirmed today.

Williams is a consummate insider who has worked at the highest levels of City Hall. She was a deputy mayor in the Richard Riordan administration; headed intergovernmental affairs for former City Attorney Rocky Delgadillo; and served as chief of staff to Deputy Mayor Austin Beutner before he resigned in April to form an exploratory committee to consider a run for mayor.

The Rev. Jeff Carr announced his resignation two days ago, saying he would step down from overseeing Villaraigosa’s administration once an “orderly transition” is complete.

Villaraigosa chose Williams for her experience, in order to help advance an ambitious agenda for his final two years in office.

Villaraigosa wants to get a dozen major transportation projects, including a subway to Westwood under Wilshire, on track for completion in 10 years instead of the originally scheduled 30 years. He has also said he wants to expand the police force to 10,000 officers. The count now is 9,963.

Williams has been an unpaid adviser to Beutner’s campaign. She’s not expected to continue in that capacity.