Marine Corps · SSN history

627 Special Service School Instructor

Appendix B lists SSN 627, Special Service School Instructor, under AR 615-26 of September 1942 and its supplements, and directs readers to Chapter I, Section 7 for instructor classification. That reference does not establish a cancellation, rename, or fixed replacement specialty.

Documented history

Special Service School Instructor

June 1945 is the manual’s publication date; the entry gives no effective date for a classification change.

  • Instructor duties generally shared the MOS and SSN of the corresponding functional specialty, so classification depended on the individual’s work and qualifications.
  • Separate instructor specialties applied where no tactical or operational counterpart existed. SSN 659, Instructor (Designated Subject), applied only to rare enlisted instruction without a close military-job relationship or a specific instructor specialty, not automatically to everyone formerly classified under SSN 627.
Source extraction notes

Predecessor title from the AR 615-26 column: Special Service School Instructor. Suggested conversions/remarks, as printed: See Section 7 of Chapter I. This is a cross-reference or instruction to review the job specification, not an explicit fixed replacement or proof of cancellation. The table gives no row-level calendar effective date. June 1945 is the manual publication date, not an inferred individual conversion date.

Source documents (1)

Reviewed September 24, 2026 against references 3, 4 and 5.

Historical information is drawn from the sources linked above. Classification dates are not personal service dates. Spot an error? Let us know.