Marine Special Operations Command - Critical Skills Operator (CSO)

MarSOC - CSO 0372 MOS

Official USMC Photo

In 2011, the MarSOC Marine Occupational Specialty (MOS) for the Critical Skills Operator (CSO) was created to create a permanent career option for those Marines who choose for stay within the Marine Special Operations Command for the remainder of their career.

The Critical Skills Operator is a Marine who has screened positively for the Marine Corps Special Operations Command.  Once part of the MarSOC command, the Marine also assumes the title of "Raider".

The CSO is a Special Operator skilled in the following special combat operations:

Foreign Internal Defense (FID), Direct Action (DA), Special Reconnaissance (SR) and Counter- Terrorism (CT), the Secondary Core Task of Information Operations (IO) and tasks in Support of Unconventional Warfare (UW) as part of the Marine Corps component to SOCOM. MarSOC Marines (Raiders) are capable of rapid deployment and integration into a joint special operations or conventional forces.

CSOs are intensively trained as a Subject Matter Expert in advanced communications, engineering, special weapons, intelligence, advanced special operations, and language skills, depending on their billet in the Marine Special Operations Team. 

Requirements for Critical Skills Operator within MarSOC:

All Marines, regardless of MOS, must successfully complete MarSOC Assessment & Selection (A&S), Individual Training Course (ITC) and must request and be granted a lateral move to the 0372 MOS.

COMMARFORSOC is the awarding authority for the primary MOS 0372.

Prerequisites for CSO:

  • Must be a U.S Citizen.
  • Must possess a GT score of 105 or higher.
  • Must have a minimum current USMC PFT score of 225 (regardless of age).
  • Must be a volunteer in the grade of Corporal through Staff Sergeant in any MOS.
  • Must have a minimum of 2 years in service and no more than 17 years in service.
  • No derogatory Page 11 entries within the last 12 months.
  • No NJPs within the last 12 months and with no more than two NJPs during the current contract.
  • No NJPs as a SNCO.
  • No courts martial convictions.
  • No incidents with drug use or possession while in service.
  • No adverse fitness reports within the last 12 months.
  • Must have minimum interim secret security clearance based on National Agency check, Law Enforcement and Credit check (NACLC).

MarSOC is a component of the US Special Operations Command (SOCOM) that is a joint group consisting of the Naval Special Warfare Command (SEAL / SWCC), Army Special Operations Command (Special Forces, 75th Rangers, Special Operations Aviation), Air Force Special Operations Command and the Joint Special Operations Command (JSOC).