The Army’s Special Forces Military Occupational Specialty (MOS) 18 is a collection of jobs within a Special Forces Operational Detachment Alpha (ODA). These jobs are commonly referred to as Green Berets.
The MOS 18 jobs include:
MOS 18B, Special Forces Weapons Sergeant
MOS 18C, Special Forces Engineer Sergeant
MOS 18D, Special Forces Medical Sergeant
MOS 18E, Special Forces Communications Sergeant
MOS 18F, Special Forces Operations & Intel Sergeant
MOS 18Z, Special Forces Senior Sergeant
The Special Forces Officer is the missing 18A. The Special Forces Officer is in charge of the ODA and is responsible for both operations and administration.
The Special Forces Engineer Sergeant is a demolitions specialist who carries out raids against strategic enemy targets. The Special Forces Communications Sergeant organizes, trains, and supervises the installation and use of communications equipment.