What are primary, secondary, and duty MOSs?
All Soldiers receive a primary Military Occupation Specialty (MOS), in which they normally work and are evaluated annually. Some Soldiers additionally receive a secondary MOS, which is generally related to their primary MOS. The duty MOS is the work assignment given by the Soldier’s supervisor and that in which he will be evaluated for performance. As in most cases the duty and primary MOSs are the same, the Soldier must maintain dual proficiencies in both areas and institutions are advised to award credit in the primary and duty MOS.
