Marine Corps MOS codes organize every military job into clear roles, from infantry to logistics and aviation. Understanding these codes helps service members, recruiters, and families track assignments, training paths, and career progression.
Use this guide to decode the structure of MOS codes, compare related jobs, and find the right fit for your goals in the Marine Corps.
| MOS Code | Job Title | Branch | Core Duties |
|---|---|---|---|
| 0311 | Infantry Rifleman | United States Marine Corps | Engage enemy forces, conduct patrols, and secure terrain |
| 2131 | Field Artillery Cannoneer | United States Marine Corps | Operate artillery systems, coordinate fire missions |
| 0369 | Reconnaissance Marine, Parachute Qualified | United States Marine Corps | Conduct amphibious reconnaissance and gather intelligence |
| 0341 | Assault Amphibian Vehicle Crewman | United States Marine Corps | Drive tracked amphibious vehicles from ship to shore |
| 2691 | Logistics Specialist | United States Marine Corps | Manage supplies, transportation, and distribution |
Understanding the MOS Code Structure
Each MOS code follows a pattern where the first digit indicates the occupational field and the remaining digits refine the specialty. Learning this structure makes it easier to identify related jobs and training requirements across the Marine Corps.
First Digit: Occupational Field
The first number groups jobs into broad categories such as infantry, logistics, aviation, and administration. This high level view helps service members compare roles at a glance.
Last Three Digits: Specific Skills and Rank Level
The remaining digits specify the exact duties, equipment, and leadership responsibilities. These digits also signal whether a MOS is entry level or requires advanced qualifications.
Key Jobs in Infantry and Reconnaissance
Infantry and reconnaissance MOS codes form the tip of the spear for Marine Corps operations. These roles focus on direct engagement, movement, and information collection in complex environments.
0311 Infantry Rifleman
Responsible for engaging enemy forces, conducting security operations, and supporting maneuver elements during combat.
0369 Reconnaissance Marine
Specializes in behind‑enemy‑area surveillance, target acquisition, and reporting to support planning and precision strikes.
Artillery, Armor, and Logistics Roles
Beyond the tip of the spear, MOS codes cover firepower, mobility, and sustainment. Artillery, amphibious vehicles, and logistics positions ensure Marines can operate at range and across extended distances.
2131 Field Artillery Cannoneer
Manages artillery pieces, computes firing data, and synchronizes indirect fire to shape the battlespace.
0341 Assault Amphibian Vehicle Crewman
Operates tracked amphibious vehicles that move troops and equipment from ship to shore under fire.
2691 Logistics Specialist
Handles supply chain functions, including inventory control, transportation coordination, and distribution to forward units.
Training and Advancement Paths
Advancing in a Marine Corps MOS often requires schools, on‑the‑job experience, and leadership development. Each MOS has a learning roadmap that aligns with promotion eligibility and operational needs.
- Complete entry training and the School of Infantry or related technical course
- Attend advanced specialty courses for leadership or high‑skill equipment
- Gain operational experience to qualify for expanded responsibilities
- Pursue cross‑training or lateral moves to broaden career options
Strategic Focus for Your Marine Corps Career
Aligning your MOS code with long term objectives, education plans, and leadership goals increases satisfaction and opens more opportunities over time.
- Review MOS requirements and career fields early in your service
- Invest in relevant schools and certifications to expand options
- Seek mentorship from senior Marines in your target MOS
- Track promotion timelines and required qualifications for your MOS
FAQ
Reader questions
What does a 03XX MOS code indicate in the Marine Corps?
MOS codes in the 03XX range represent infantry and related ground combat roles, including rifle, reconnaissance, and assault amphibian positions.
How can I find my current MOS code and job description?
Service members can check their official military personnel record, speak with a career planner, or review the Marine Corps publication that lists each MOS and associated duties.
Do Marine Corps MOS codes transfer to civilian jobs after service?
Many MOS codes map to civilian roles in security, logistics, operations, and technical fields, especially when combined with veteran training programs and credentialing.
Can a Marine change MOS codes later in their career?
Yes, Marines can reclassify or retrain into different MOS codes through formal schools, qualification programs, and approval from their command and career stakeholders.