mos.directory

Coast Guard Officer specialty · Support

CG-SEI10 Specialty Experience Indicator (SEI)

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

A Coast Guard officer specialty, not an enlisted rating.

Browse Coast Guard

Overview

Officers are encouraged to apply for Specialty Experience Indicator subspecialties in fields such as human resources management, medical administration, external affairs, acquisition project management, safety, and training management. The indicator also includes subspecialties in international affairs, enterprise planning and budgeting, auxiliary operations coordination, and other designated areas, but no personnel receive approval for the general Specialty Experience Indicator specialty.

Notes & Sources

  • COMDTINST M5300.3A (Officer Specialty Management System Manual, 3 Jun 2020) establishes the Coast Guard’s Officer Specialty Code system; by its Table 4-1 nomenclature, CG-SEI10 is a Specialty code (SEI = the specialty’s abbreviated name; “10” marks the Specialty and “11” and higher mark Subspecialties within it).
  • The authoritative list of approved Specialties/Subspecialties and each code’s Officer Specialty Requirement (OSR) is maintained by PSC-OPM-3 on the CG Portal, which is not public; no code-exact official definition of duties was retrievable.
  • The description shown on this page is Coast Guard recruiting-site category prose aligned by specialty (gocoastguard.com officer categories), not the code’s official OSR; treat it as a general indication of the specialty’s field, not proof of any individual holder’s duties, qualifications, or training.
  • The manual states no personnel will be assigned nor any billets labeled with CG-SEI10 itself: it exists to house the SEI subspecialties (CG-SEI11-CG-SEI24), which officers pursue individually.
Evidence for this guidance (2 documents)
  1. Coast Guard Officer Specialty Management System Manual, COMDTINST M5300.3A (3 Jun 2020)

    [1] Ch.4 §I Specialty Experience Indicator (SEI)

    Supports: Specialty definition

  2. DMDC COOL USCG MOC feed: CG-SEI10 (Officer Specialty)

    [2] moc_id 8861, moc_key osc_cg_sei10, moc_codetype “Officer Specialty” (cached feed fetched 2026-07-24)

    Supports: Specialty definition

Source review recorded September 24, 2026.

Defense contractor jobs for CG-SEI10

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

Report an error on this page