Joseph Alexis, a 25-year veteran of the Brooklyn District Attorney’s Office and the head of its red zone trial bureau, has been promoted to chief of the office’s trial bureau, according to an internal memo released Monday.

The DA’s office divides Brooklyn into five color-coded trial zones; the red zone encompasses neighborhoods on the eastern edge of Brooklyn, including East New York, Cypress Hills and Canarsie, as well as neighborhoods just east of downtown Brooklyn.