03 - Infantry

In addition to the Infantry Officer, Marine Gunner and Infantry Unit Leader, the 03 occupational field is comprised of the following specialties: Rifleman, Light Armor Vehicle Marine, Sniper, Reconnaissance Marine, Machine Gunner, Mortarman, and Antitank Missile Gunner. Regardless of specialty, Infantry Marines are primarily employed in units from the team to regimental level to locate, close with and destroy the enemy in all environments and weather conditions, day and night. Excluding LAR Units, Infantry Marines are principally trained to operate light and fast on foot. Infantry units are capable of multiple methods of entry and insertion, embarking aboard and fighting from helicopters, assault amphibious vehicles, motorized tactical vehicles, ultra-light tactical vehicles and small boats. As a principal component of a Marine Air-Ground Task Force's Ground Combat
Element, Infantry Marines must be able to operate effectively in austere, distributed environments characterized by friction, uncertainty, and chaos. In every operating environment, all Infantry Marines must be physically dominant and masters of small arms marksmanship, tactical combat casualty care, and battle drills; Infantry units must be comprised of Marines proficient in the employment of demolitions, rockets, machine guns, mortars, missile systems, and capable of directing supporting arms. As dictated by the operating environment, Infantry units must be comprised of Marines proficient in field craft and capable of employing unmanned systems, limited information warfare, and non-lethal systems.

Officer MOS List

0301

Basic Infantry Officer

2ndLt through LtCol

Basic MOS

0302

Infantry Officer

2ndLt through LtCol

Primary MOS

0303

Light Armored Reconaissance (LAR) Officer

2ndLt through LtCol

Primary MOS

0306

Infantry Weapons Officer

CWO2 through CWO5

Primary MOS

0307

Expeditionary Ground Reconnaissance (ESG) Officer

2ndLt through LtCol

Secondary MOS

0370

Special Operations Officer

2ndLt through LtCol

Primary MOS

Enlisted MOS List

0300

Basic Infantry Marine

Pvt through Sgt

Basic MOS

0311

Rifleman

Pvt through Sgt

Primary MOS

0313

Light Armored Reconnaissance Marine

Pvt through Sgt

Primary MOS

0316

Combat Rubber Reconnaissance Craft Coxswain

PFC through SSgt

Secondary MOS

0317

Scout Sniper

LCpl through GySgt 

Secondary MOS

0321

Reconnaissance Marine

Pvt through MGySgt

Primary MOS

0322

Reconnaissance Marine, Parachute Qualified

Pvt through MGySgt

Primary MOS

0323

Reconnaissance Marine, Combatant Diver Qualified

Pvt through MGySgt

Primary MOS

0324

Reconnaissance Marine, Parachute & Combatant Diver Qualified

Pvt through MGySgt

Primary MOS

0331

Machine Gunner

Pvt through Sgt

Primary MOS

0341

Mortarman

Pvt through Sgt

Primary MOS

0351

Infantry Assault Marine

Pvt through Sgt

Primary MOS

0352

Antitank Missile Gunner

Pvt through Sgt

Primary MOS

0363

Light Armored Reconnaissance (LAR) Unit Leader

SSgt through GySgt

Primary MOS

0365

Infantry Squad Leader

Cpl through Sgt

Primary MOS

0367

Light Armored Reconnaissance Master Gunner

Sgt through MGySgt

Secondary MOS

0369

Infantry Unit Leader

SSgt through GySgt

Primary MOS

0372

Critical Skills Operator

Sgt through MGySgt

Primary MOS

0393

Light Armored Reconnaissance Operations Chief

MSgt through MGySgt

Primary MOS

0399

Operations Chief

MSgt through MGySgt

Primary MOS

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