Sergeant Major of the Marine Corps · Converted to 8991, effective 2006
The cited source prints the MOS code but not its occupational title; no title was inferred. Enlisted MOS moved from reporting category 9000 to miscellaneous-requirements category 8000. The manual is effective 2006-05-15, but personnel/HRDP implementation is explicitly deferred, so effective_to is null. No row-specific effective date is printed; year-only precision reflects the 2006 manual transition.
Sources
- MARADMIN 329/06, MOS Manual Changes and Conversions (MARADMIN 329/06, paragraph 1.B(1), enlisted block, lines 114-119)
- MCO P1200.16, Military Occupational Specialties Manual, 18 Apr 2005 (title source) (Figure 3-37, alphabetical listing of enlisted MOSs, printed p. 3-522 / PDF p. 713, MOS 9991 title row)