PORTLAND — Deputy City Manager Sheila Hill-Christian awaits only a Wednesday, Sept. 3, City Council vote to be named acting city manager. The vote is scheduled immediately after councilors formally accept the resignation of City Manager Mark Rees, who will step down that day. Hill-Christian will take over at noon Thursday, Sept. 4, according to the council's agenda. Councilors will also vote to form a search committee for a new city manager, led by Mayor Michael Brennan. Brennan will be joined by Councilors Ed Suslovic, Jill Duson and Nick Mavodones Jr.