John J. Broussard was named chief investment officer for the Louisiana Department of the Treasury, Baton Rouge. He replaced J. Cooper Harrell, who retired in October. Mr. Broussard will oversee more than $6 billion in the state's general fund, trust fund and 529 plan. Mr. Broussard was CIO of Marlin Investments LLC, Lake Charles, La. Details about his replacement were not available by press time.