Billet Designator—Senior Intelligence Leader (SIL)
October 1, 2026 is the scheduled active-component batch implementation date in the Marine Corps Total Force System, not a retraining completion deadline.
- Reserve retraining, where required, is subject to available funds for Prior Service MOS Retraining Program, Active Reserve, and Selected Marine Corps Reserve Marines. For Individual Mobilization Augmentees, Individual Ready Reservists, and Standby Reservists, service-record entries are authorized by the headquarters conversion action appearing on the unit’s Diary Feedback Report.
- Formal schools continue awarding current MOSs until a MARADMIN directs implementation of the new conversions.
Source extraction notes
New title: Intelligence Senior Enlisted Leader (ISEL). NAVMC 1200.1M (FY27) paragraph 4001.1b schedules the active-duty-component MCTFS batch for 2026-10-01. Paragraph 4001.5 separately addresses Reserve retraining, subject to available funds for the specified groups, and records for Individual Mobilization Augmentees, Individual Ready Reservists and Standby Reservists. Paragraph 4002.3 keeps formal-school MOS awards unchanged until MARADMIN implementation direction. The scheduled batch date is not proof of an individual's qualification, retraining or record-update completion.
Source documents (1)
Reviewed September 24, 2026 against references 1, 2 and 3.
- NAVMC 1200.1M, FY27 Military Occupational Specialties Manual, Figure 4-1
1. Figure 4-1, printed p. 4-13; PDF page 975 · source dated 2026 · cited by the explanation
PDF page 975 (opens in a new tab)2.NAVMC 1200.1M, FY27 Military Occupational Specialties Manual, Figure 4-1 · event transcription · docs/legacy-data/usmc-mos-conversions.jsonl:238; Figure 4-1, printed p. 4-13; PDF page 975 · cited by the explanation
PDF page 975 (opens in a new tab)3.NAVMC 1200.1M: FY27 implementation conditions and conversion legend · Paragraphs 4001 and 4002, printed pages 4-1 and 4-2; Figure 4-1 legend; cached text data/sources/text/navmc-1200-1m_fy27_2026-08.txt:59371-59440, 60152-60169 · cited by the explanation
PDF page 963 (opens in a new tab)PDF page 964 (opens in a new tab)