Roles in the Marine Corps

Many Roles. One Fight.

The Marine Corps is only as capable as each and every Marine. To that end, Marines are assigned specific roles for which they are optimally trained. Each making a critical difference in a collective fight, Marines develop skills in specific Military Occupational Specialties (MOSs), and are expected to become experts in their respective fields. Together, Marines deliver the expertise our Nation demands in more than 300 disciplines, combining efforts to become a diversely talented, unwavering force.






Marine Corps Ranks

The ranks that adorn the uniforms of our Marines represent what has been achieved and what new expectations are to come.

Military Occupational Specialty

There are many MOSs and many ways Marines serve in the air, on land, at sea, and even in cyberspace, but regardless of role, they will forever be known by the purpose they fight with and the cause they fight for.


Musicians interested in the Corps have the opportunity to become elite warriors and also receive extensive musicianship training.

Judge Advocate Division

Marine Judge Advocates are both lawyers and Officers that represent their fellow Marines and the Corps in any number of legal matters.