Series 99 required, or ability to obtain within 120 days (as required by FINRA). Persons holding Series 6, 7, 17, 37 or 38 or those who hold principal-level registrations: Series 4, 9/10, 14, 16, 23, 24, 26, 27, 28, 51, and 53 would be qualified to register as an Operations Professional (Series 99) without passing the examination.