Cook County Chief Financial Officer Ammar Rizki [left] answered questions from Comm. John Daley (D-11) and others during budget hearings on Monday.

Cook County commissioners signaled plans on Monday to give a thorough vetting to the nearly 1,600 new positions that county board President Toni Preckwinkle is proposing to add to the county’s payroll next year — especially as the county leaders look to fill an untold backlog of vacant positions already on the books.