How To Become An Infantry Officer In The Marines

Becoming an infantry officer in the marines is never an easy feat.

Infantry officers in the marines undergo training that pushes their physical and mental limits, which is necessary for any mission or task they find themselves in.

This training enables them to develop the capacity to defend their territory, carry their team members in dire situations as well as find and destroy their enemies.

The Marine Corps Infantry must ensure infantry Marines, also known as “grunts,” are trained and capable of ground combat missions. 

As much as it is a difficult task for an inexperienced officer, the lessons they stand to learn are priceless.

It is a susceptible task for the Marine Corps, and they consider it a primary military occupational specialty (PMOS). 

Infantry officer training at Marine Corps Base is among the most challenging U.S. military facilities. Statistically, those who could not complete the training are about 25 percent.

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It includes completing nine mountain climbs, participating in six strategic field trials, and crossing a 56″ wall in 30 seconds or less.

The lesson also requires exceeding body standards, including completing a 15-mile journey carrying 105 lbs. in three hours or less.

They carry out the injured people on the ground, modeled at carrying a 200-lb. dummy for 54 seconds and lifting a 77-lb machine gun high while running 300 meters in less than four minutes.

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How To Become An Infantry Officer In The Marines 

To become a Marine infantry officer, you must be part of the Reserve Officers’ Training Corps program. 

A college, university, or marine recruiter offers the program. 

Suppose you meet the requirements and pass a physical fitness test. You will have to complete 12 weeks of basic understanding training at the Basic School.

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Criteria Of Marine Infantry Officer

According to the United States Naval Academy, the job of a Marine Infantry Officer is crucial to the Marine Corps as an expeditionary force.

Undoubtedly, one must undergo vigorous training and education with optimum fitness levels to become a Marine infantry officer. 

Nevertheless, here is a list of criteria that one must meet to become a Marine Infantry Officer:

  • Only a minimum of 18 to 27 years old at the time of application
  • They are a U.S. citizen
  • They must be a full-time student at an accredited college or university or have a bachelor’s degree.
  • They must pass a physical examination
  • They must graduate from the School of Designation
  • Registered soldiers, by comparison, must be at least 17 years old and require only a high school diploma.

Physical Conditions and Training

The physical condition one must pass is known as the Initial Strength Test.

Candidates must perform at least three pull-ups, 44 ammo can lift, and 44 crunches within two minutes. 

Additionally, they must complete a 1.5-mile run in 13 minutes and 30 seconds or less.

After this physical training, they must enroll in the MOS Election Primary School.

About 95 percent of aspiring police officers get one of their top five options, reports Marine Officer MOS Assignment Handbook. MOS degrees are usually awarded based on student preferences, skills, and other unique considerations, such as intermediate job experience in a particular area.

Emerging newborn officers must pass physical fitness tests (PFT) and combat fitness tests (CFT) to meet MOS Planning Standards.

CFT incorporates ammo can lifts and movement to touch and direct under fire. Students must also meet all the requirements of the MOS curriculum they want.

The purpose of the CET is to test whether the Marine will successfully train infantry.

CET is just one of several testing tools for Marine officials.

In PFT, you must do at least six pull-ups and run 3 miles in 24 and 51 seconds or less.

Primary School requires 12 weeks of training. Its purpose is to educate and train recruits.

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Candidates have the opportunity to develop their leadership skills, expand their knowledge and develop the mental, physical and moral character required for Water performance. 

The training they receive is similar to what they teach in the Army Infantry Officer Course.

The Marine Officer MOS Assignment Handbook assigns Infantry officers graduating from Primary School to the Armed Forces.

In this role, their mission is to train about 45 Marines and meet the objectives of the navy. Others may be assigned different functions, depending on their abilities.

All officers must take and pass physical fitness tests every six months to maintain their MOS fitness.

Duties Of An Infantry Officer In The Marines 

There are so many duties of an infantry officer in the Marines. Some of these duties include:

  • To lead their troops in combat and moral and ethical activities. They have the difficult task of deciding how to use and use weapons and equipment in combat situations, including surveillance, military systems, and intelligence.
  • Improving Marine Corps military systems in both offensive and defensive situations. The police are leaders in their forces and provide discipline, maintain discipline and ensure the welfare of the Marines under their command.
  • They provide training in combat equipment and control the use of weapons and equipment among the infantry. Infantry officers are responsible for collecting and evaluating enemy operations’ intelligence.
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  • Assisting in neonatal and emergency care units officially known as Marine Air-Ground Task Forces (MAGTFs). Organize, direct, and assist with implementing and monitoring MAGTF strategies and any subordinate and testing units.
  • Supervise the use of machine guns and mud. They and their soldiers supported the offensive operations with assault units. They may use anti-aircraft or demolition units to support these operations.

Workplace Of An Infantry Officer In The Marines 

Because infantry officers must be ready to lead their troops anywhere in the world where soldiers are needed, working and training in all weather and weather conditions.

During practice, as in real combat situations, officers on footwork eat and sleep outside and in tents. When they are not in the arena, child officers perform administrative and administrative duties in offices.

Practical Qualities Of An Infantry Officer In The Marines 

  • The ability to inspire and lead others
  • Interest in world war history and strategies
  • Willingness to accept the challenge and face the risk


Many people wish to become Infantry officers in the Marines. One must conclude that as much as it is a desired career, it is equally challenging to be successful at times.

One must be dedicated and diligent in becoming a qualified Infantry Officer in the Marines.

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