Marines are trained in many different roles but fight each battle together, positioning our Nation out front to win on any front. There are hundreds of these roles available for aspiring Marines, roles the Marine Corps refers to as Military Occupational Specialties (MOS). These MOS are categorized into Military Occupational Fields, most of which are described on this page.
After completing Marine Corps Recruit Training, Marines can become an expert in any number of 300+ MOS, creating a diverse and talented group of modern fighters for our Nation.
MOS training comes in many forms, including