Critical Skills Operator

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 Additional Military Occupational Skill (AMOS) of 0370. CSOs can stay in the fight with MARSOC for the duration of their Marine Corps career.

Special Operations Capabilities Specialist

Special operations are conducted by small teams in hostile, denied, or politically sensitive areas. Success depends on the skill, maturity, and professionalism of each member of the team. Special Operations Capability Specialists (SOCS) are Marines who provide combat support expertise in intelligence, fire support, communications, and canine operations as part of a Marine Special Operations Team.

The MARSOC Combat Support Orientation Course (MCSOC) is designed to identify Marines from combat support MOS who are interested in a tour in special operations. MCSOC will educate these Marines about the unique challenges, opportunities, training and operations that await those assigned to MARSOC to become SOCS.

For more information on becoming a SOCS, submit an email request to with following information: rank, last name,first name, middle initial, EDIPI, MOS, date of rank, date current tour began, security clearance and adjudication date, last PFT/CFT score and date, and command point of contact.


  • Special Operations Training Course (STC): Six weeks of unhindered, realistic, challenging basic and intermediate SOF war fighting skills training.
  • Survival, Evasion, Resistance, and Escape Training (SERE)
  • MARSOF Level 1 MOS Specific Courses
    • Explosive Ordnance Disposal (6 weeks)
    • Communications (12 weeks)
    • Intelligence (4-6 weeks)
    • Joint Terminal Attack Controller (4 weeks)
    • Multi-Purpose Canine (10 weeks)
    • SARC/IDC Corpsman (13 months)

Combat Service Support

Combat Service Support Marines serve one standard tour with MARSOC in their primary MOS, such as Motor Transport or Logistics. Their training includes core skills for joint and interagency work as well as enhanced SOF combat skills training to enable their successful integration and survivability in special operations environments.