Officer Ranks in the Marine Corps

To commission as a Marine Officer is both a great honor, and a great commitment—to the Corps, our Nation and its people. Regardless of rank, America counts on Marine Officers to lead Marines into battle and win. Second lieutenant, first lieutenant and captain are the first three officer ranks, and those who earn them are referred to as company-grade officers. Promotion to the rank of major is a significant milestone for Marine Officers, as they join lieutenant colonels and colonels as field-grade officer