After nearly 40 years with the Contra Costa Community College District — the last four years at the helm — Chancellor Mojdeh Mehdizadeh has announced she will retire on Dec. 30. Her interim replacement until the end of July is Micaela Ochoa, who currently serves as executive vice chancellor of administrative services. She has been with 4CD since 2022. While this change in leadership comes in the middle of an academic school year, several district officials expressed confidence that the…