0399 -  Operations Chief

             MSgt - MGySgt

The 0399 Operations Chief MOS is the senior most enlisted primary MOS for the infantry community. 

The Operations Chief is responsible to the commander and assists in all levels of planning, training, deployment and employment of MAGTF capabilities to include the integration and synchronization of the warfighting functions. Supervises and coordinates the preparation and assignment of all personnel/equipment supporting each warfighting function in accordance with the Table of Organization/Table of Equipment of their unit.  The Operations chief will assist with training exercise, deployment, and operational planning and execution in concert with the unit's Operations Officer in order to support the Commander's intent of Unit Commanders.


The Operations Chief assists unit readiness by recording evaluations and training readiness task completion within program of record systems. The Operations Chief is responsible to facilitate and develop concepts of employment for new and emerging technologies fielded to the Marine Corps.  The Operations Chief establishes Operation Posts, supervises information management and assists in operation of unit command and control.

Marines in this MOS must have held the MOS 0369 and be top secret eligible and secret security clearance required.


There are approximately 130 0399's on active duty in the Marine Corps.  The MOS is awarded following successful completion of the Operations and Tactics Instructor Chief Course, Marine Corps Tactics and Operations Group (MCTOG), Twentynine Palms, California.  Marines must also complete the Fire Support Coordination Center (FSCC) Course and have current/valid Secret Internet Protocol Router Network (SIPRNET) access.

To learn more about enlisted career paths, please visit our Enlisted Info section.

To learn more about other MOS's, please visit our Complete MOS List.

If you feel any of this information is inaccurate or incorrect, or have additional resources to inform our audience, please Contact Us.

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