Critical Skills Operator or Special Operations Officer
Critical Skills Operators (CSOs) and Special Operations Officers (SOOs) are assigned to billets at the team, company, and battalion levels.
Enlisted Marines are designated CSOs and awarded the 0372 Military Occupational Specialty (MOS) while officers are awarded the 0370 MOS.
CSOs and SOOs will maintain this MOS for the duration of their Marine Corps career.
Special Operations Capabilities Specialist
Special Operations Capabilities Specialists (SOCS) are Marines who provide expertise in intelligence, fire support, communications, and canine operations as part of a Marine Special Operations Team.
Success depends on the skill, maturity and professionalism of each member of the team.
Combat Service Support
Combat Service Support Marines serve one standard tour with MARSOC in their primary MOS, such as Motor Transport or Logistics.