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Coast Guard Officer Subspecialty · Combat & Infantry

CG-OAR12 Defense Operations/Readiness

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

Defense Operations/Readiness officers facilitate Coast Guard activities in the defense community through national defense operations, planning, and execution at tactical, operational, and strategic levels. They serve in defense readiness positions within Coast Guard, Department of Defense, or interagency units and rotate between defense staff and operational assignments.

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-OAR12 is a Subspecialty code (OAR = 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-OAR12 (Subspecialty)

    [2] moc_id 8852, moc_key ssc_cg_oar12, moc_codetype “Subspecialty” (cached feed fetched 2026-07-24)

    Supports: Specialty definition

Source review recorded September 24, 2026.

Defense contractor jobs for CG-OAR12

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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