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Coast Guard Officer Subspecialty · Support

CG-SEI24 Operational Safety Specialist

Current service use not established

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

An officer subspecialty earned alongside a primary designator, marking advanced education or experience in this field.

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Overview

An Operational Safety Specialist serves at both field and staff levels and is trained for roles that apply Coast Guard Safety Management System principles. The officer has knowledge of safety policing, safety risk management, safety assurance, and safety promotion.

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-SEI24 is a Subspecialty 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.
Evidence for this guidance (2 documents)
  1. Coast Guard Officer Specialty Management System Manual, COMDTINST M5300.3A (3 Jun 2020)

    [1] Ch.1 §B (system overview); Ch.4 Table 4-1 (OSC terminology)

    Supports: Specialty definition

  2. DMDC COOL USCG MOC feed: CG-SEI24 (Subspecialty)

    [2] moc_id 10775, moc_key ssc_cg_sei24, moc_codetype “Subspecialty” (cached feed fetched 2026-07-24)

    Supports: Specialty definition

Source review recorded September 24, 2026.

Defense contractor jobs for CG-SEI24

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

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