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Marine Corps MOS · Combat & Infantry

0399 Operations Chief

Current service use not established

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

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Overview

The Operations Chief assists commanders with planning, training, deployment, and employment of Marine Air Ground Task Force capabilities while integrating and synchronizing warfighting functions. This specialist coordinates personnel and equipment assignments, records readiness and training evaluations, develops concepts for emerging technologies, establishes operations posts, and supports unit command and control.

Core Skills

  • Personnel and equipment alignment with unit requirements
  • Training evaluation and readiness completion tracking
  • Employment concepts for newly fielded technologies
  • Operations post establishment and information management

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Emergency Management Directors

Coordinating deployment plans, personnel and equipment assignments, and operations posts provides a foundation for emergency preparedness planning and response coordination.

How to prepare: Target emergency preparedness planner or coordinator assignments first to build civilian emergency-management experience. Director positions are a later target that typically requires substantial relevant experience and commonly a bachelor's degree, rather than an entry route into the field.

What the civilian work involves
  • Develop and maintain liaisons with municipalities, county departments, and similar entities to facilitate plan development, response effort coordination, and exchanges of personnel and equipment.
  • Maintain and update all resource materials associated with emergency preparedness plans.
  • Prepare emergency situation status reports that describe response and recovery efforts, needs, and preliminary damage assessments.
Civilian tools and software (examples)
  • Microsoft Excel
  • Alert Technologies OpsCenter

Document Management Specialists

Supervising operational information management and recording training evaluations in official systems provides relevant experience for organizing and maintaining electronic records.

How to prepare: Create a sample SharePoint document library with a classification scheme, searchable metadata, and written access and retrieval procedures.

What the civilian work involves
  • Assist in determining document management policies to facilitate efficient, legal, and secure access to electronic content.
  • Assist in the development of document or content classification taxonomies to facilitate information capture, search, and retrieval.
  • Identify and classify documents or other electronic content according to characteristics such as security level, function, and metadata.
Civilian tools and software (examples)
  • Microsoft SharePoint
  • Adobe Acrobat

Notes & Sources

Evidence for this guidance (3 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 0399

    [1] MOS 0399 section "a. Summary"; cached text line 28686; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Personnel and equipment alignment with unit requirements, Training evaluation and readiness completion tracking, Employment concepts for newly fielded technologies, Operations post establishment and information management, Emergency Management Directors (O*NET 11-9161.00), Document Management Specialists (O*NET 15-1299.03)

  2. O*NET: Emergency Management Directors

    [2] O*NET 30.3 occupational data

    Supports: Emergency Management Directors (O*NET 11-9161.00)

  3. O*NET: Document Management Specialists

    [3] O*NET 30.3 occupational data

    Supports: Document Management Specialists (O*NET 15-1299.03)

Defense contractor jobs for 0399

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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