Fiscal Year 2027 Military Occupational Specialties Manual Changes Implementation

1.  Each year the Marine Corps Human Resource Development Process<br>
is synchronized through publication of ref (A), the Military<br>
Occupational Specialties (MOS) Manual.  Ref (B) governs the process.<br>
Ref (A) defines occupational specialties found on tables of<br>
organization, identifies skills to meet organizational requirements,<br>
and otherwise provides information that enables the Marine Corps<br>
to carry out its assigned mission to organize, train, assign and<br>
manage the force.  The annual revision of the MOS Manual was<br>
coordinated with the January 2026 authorized strength report.<br>
2.  The fiscal year (FY) 2027 MOS Manual contains significant and<br>
numerous changes.  A complete list of changes can be found in the<br>
conversion tables (chapters 2 and 4) of ref (A), which can be<br>
viewed on the website identified in paragraph (par) 5 below.<br>
2.a.  New officer MOSs were created in occupational fields (OccFlds)<br>
05, 17, 59, 80, and 88. New enlisted MOSs were created in OccFlds<br>
05, 13, 17, 59, and 81.<br>
2.b.  Enlisted MOS 2146 (Heavy Ordnance Vehicle Repairer/Technician)<br>
has been deleted.<br>
2.c.  There are MOS title changes in officer OccFlds 02, 06, 26, 30,<br>
75, 80 and 82; there are no officer grade structure changes.  <br>
2.d. There are MOS title changes in enlisted OccFlds 06, 13, 28,<br>
63, 82, and 86; and there are grade structure changes in enlisted<br>
OccFld 06.<br>
2.e.  There are changes to the summary, requirements, and <br>
prerequisites fields within the MOS Manual in officer and enlisted<br>
OccFlds 01, 02, 03, 04, 05, 06, 08, 09, 11, 13, 17, 18, 21, 23, 26,<br>
27, 28, 30, 33, 34, 41, 44, 45, 55, 57, 59, 60, 61, 62, 63, 64, 65,<br>
66, 68, 70, 72, 73, 80, 81, 82, 86, and 88.<br>
2.f.  There are no officer category status changes. There are<br>
category status changes in the enlisted OccFld 06.<br>
3.  To ensure content accuracy and completeness of the MOS Manual,<br>
significant changes to the MOS Manual were reviewed in accordance<br>
with ref (B) by the personnel, organization and training working<br>
groups, featuring representatives of Total Force Structure Division,<br>
Training and Education Command (TECOM), and Manpower and Reserve<br>
Affairs (M&amp;RA), as well as occupational field managers and MOS<br>
specialists.<br>
4.  Execution<br>
4.a.  As of 1 October 2026, the Total Force Structure Management<br>
System and Marine Corps Total Force System (MCTFS) will be updated<br>
to reflect the revisions set forth in ref (A).<br>
4.b.  Commanding officers and all personnel that rely on information<br>
management systems, including, but not limited to MCTFS, Total Force<br>
Structure Management System, and Marine Corps Training Information<br>
Management System, shall familiarize themselves with the<br>
revisions and take actions as directed in the manual.<br>
4.c.  Commanding officers of reporting units must process MOS<br>
conversions, deletions, and / or report any new MOSs for Marines<br>
based on the revised manual as of 1 October 2026.<br>
4.d.  School directors will begin awarding updated MOSs on 1 October<br>
2026 at which time obsolete MOSs will no longer be awarded.<br>
4.e.  DC M&amp;RA<br>
4.e.1.  Convert MOSs in all systems including MCTFS as summarized in<br>
chapters 2 and 4 of ref (A).<br>
4.e.2.  Ensure appropriate action is completed for Marines affected<br>
by deletion of their Primary MOS.<br>
5.  The MOS Manual was approved on 2 March 2026 and is posted on the<br>
Marine Corps directives website.  The new MOS chart and ref (A) can<br>
be viewed at https://usmc.sharepoint-mil.us/sites/TECOM_PSD_MOSMan.<br>
6.  The MOS Manual is approved for implementation as of 1 October<br>
2026 (FY 2027).<br>
7.  This Manual is applicable to the Marine Corps Total Force.<br>
8.  Release authorized by LtGen Benjamin T. Watson, Deputy<br>
Commandant for Training and Education.