Interim Portland Superintendent Jeanne Crocker announced a new chief academic officer, a new director of school management and a new director of transportation for the district on Tuesday, filling several top administrative positions. The central office has had a complete turnover of its top staff since last fall. The hires announced Tuesday complete the director-level vacancies, said Crocker, who was named interim superintendent on July 7 after Emmanuel Caulk resigned to become superintendent in Lexington, Kentucky. Chief Academic Officer Becky Foley has been assistant superintendent in School Administrative District 52 in Lewiston-Auburn since 2011, and before that she was principal at North Yarmouth Middle School for almost 10 years. Foley has a master’s degree in education administration from the University of Southern Maine and is about to finish her doctorate in public policy at USM. “I’m very excited to be here and be part of the team,” Foley told the school board at its meeting at City Hall. This story will be updated.