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USMC0306

Infantry Weapons Officer

Leads weapons platoons and companies employing mortars, heavy machine guns, anti-armor weapons, and other crew-served weapons systems in support of infantry operations.

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Recruiter vs. Reality
What they tell you

Infantry Weapons Officers are the Marine Corps' masters of combined arms at the company level. You'll lead weapons platoons employing mortars, heavy machine guns, and anti-armor missiles -- the devastating firepower that enables the rifle company to close with and destroy the enemy. This is tactical excellence at its most lethal.

What it's actually like

You are a Weapons Platoon Commander, which means you own the mortars, the machine guns, the assault section, and the heaviest concentrated firepower in an infantry company. When the rifle platoons make contact, they call you. Your 60mm mortars drop rounds on targets within minutes of a fire mission. Your machine gun section delivers sustained suppressive fire that shapes the entire battlefield. You coordinate with company and battalion fires, meaning you're talking to the FAC, the FiST, and your own sections simultaneously while rounds are impacting. The tactical responsibility is immense — you control the weapons that determine whether the company can mass effects on the enemy. Your platoon sergeant is probably a staff NCO with more combat experience than you, and the dynamic between a new lieutenant and a veteran weapons platoon sergeant is the most important relationship in the company. Deployment means your weapons are the company commander's main effort for fire superiority, and you need to deliver. The administrative burden is also real: three sections of Marines with different equipment, different training requirements, and different personalities. Your tactical fire coordination skills, leadership under pressure, and combined arms expertise make you valuable to defense consulting, military contracting, and federal law enforcement tactical teams.

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MOS Intel

ClearanceSecret
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PromotionSlow
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Deploy TempoModerate
Career Intel
Duty StationsCamp Pendleton (CA) · Camp Lejeune (NC) · Quantico (VA) · 29 Palms (CA)
Daily LifeAdvising commanders on weapons employment, running ranges, managing arms rooms, overseeing marksmanship programs, and serving as the resident expert on everything from M4s to TOW missiles. You are the battalion or regiment's weapons guru and maintenance authority. Administrative duties include armory management and accountability.
AIT / SchoolWarrant Officer Basic Course at Quantico, followed by specialized weapons training. The pathway to WO in the infantry community requires extensive enlisted experience — most 0306s were senior SNCOs before selection. The WO culture is distinct: you are a technical expert, not a commander.
Physical DemandsHigh. You are expected to maintain infantry-level fitness while serving as the technical expert on all infantry weapons systems. Field time is substantial.
DeploymentsDeploys with infantry battalions and regiments; provides weapons expertise on MEU rotations and training exercises
Certifications
Warrant Officer Basic CourseInfantry weapons instructor qualificationsRange safety officerArmorer certifications
Pro Tips
  1. 1Your value is in your technical expertise — stay current on every weapons system in the battalion, including new acquisitions and upgrades.
  2. 2Build relationships with the armory and maintenance Marines. They make or break your programs.
  3. 3Document your qualifications and certifications meticulously — they translate directly to defense industry and firearms training roles.
The Honest Truth

The 0306 Infantry Weapons Officer is one of the most respected warrant officer billets in the Marine Corps. You are the subject matter expert that battalion commanders rely on for everything weapons-related. The path to get here is long — years of enlisted infantry experience — but the payoff is a stable career doing what you love without the command burden of commissioned officers. The recruiter doesn't recruit for this MOS; it finds you. Civilian translation is strong in the firearms industry, defense contracting, and law enforcement training. The downside: warrant officer promotions are slow, and the billet structure limits where you can be assigned.

Training Pipeline
1
OCS10w
Quantico (VA)
2
TBS26w
Quantico (VA)
3
Infantry Weapons Officer Course8w
Quantico (VA)
Weapons employment, fire support coordination, combined arms integration.
On the Outside

What this actually is in the real world

Your skills translate. Here's what civilian employers call this job — and what they pay.

Police and Sheriff's Patrol Officers

Strong match
$72,280$47,430$113,040/yr median
Job market: Faster than average (5%)

Management Analysts

Related field
$99,410$59,980$163,760/yr median
Job market: Faster than average (11%)

Training and Development Specialists

Related field
$63,080$37,850$106,620/yr median
Job market: Faster than average (8%)

Salary data from the U.S. Bureau of Labor Statistics Occupational Employment and Wage Statistics program, retrieved Feb 2026. BLS.gov cannot vouch for the data or analyses derived from these data after the data have been retrieved from BLS.gov.

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