USMC Enlisted Job Descriptions & Qualification Factors


The Chemical, Biological, Radiological, Nuclear (CBRN) Defense field includes the detection, identification, warning, reporting, protection, avoidance and decontamination procedures associated with CBRN hazard and contamination on the battlefield. CBRN defense specialists' duties involve operational and technical skills, along with logistical and administrative requirements. CBRN defenses specialists will be required to learn chemical and biological (CB) warfare agents' characteristics, physiological symptoms, and effects, treatment, detection, and identification.

They must know the procedures necessary for mitigating the effects of nuclear explosions and detection of radiological hazards. CBRN defense specialists will learn how to conduct CBRN hazard prediction, disseminate this information utilizing the CBRN Warning and Report System, and ensure their command effectively executes contamination avoidance procedures. CBRN defense specialists must possess the necessary knowledge to be able to employ and supervise unit level decontamination, monitor survey, and reconnaissance operations.

CBRN defense specialist must be able to effectively instruct CBRN defense individual and unit survival measures to their unit personnel, and provide more in-depth training to their unit's CBRN defense team members. Additionally, CBRN defense specialists must be familiar with the proper employment, operation, serviceability, maintenance, calibration, storage, supply, and accountability procedures for all CBRN defense equipment and materials down to the battalion/squadron level. Formal schooling is provided at the entry level.

Billets available in the OccFld are at the battalion, select squadron, regiment and Marine Aircraft Group (MAG) level; as a member of a CBRN defense platoon in the Division or Marine Logistics Group; as a member of a CBRN defense section in a Marine/aircraft Wing; on staffs involving the development of doctrine and acquisition of new equipment; as a member of a equipment assessment unit assigned to a Marine Corps Base; as a member of the Chemical Biological Incident Response Force (CBIRF); and as an instructor at a Marine Corps or other service school.

Marines entering this occFld will initially receive MOS 5700, Basic CBRN Defense Marine.

Below are the Marine Corps Enlisted Military Occupation Specialties which are organized under this occupational field:

5711 --Chemical, Biological, Radiological, and Nuclear (CBRN) Defense Specialist

5731 --Joint Chemical, Biological, Radiological, Nuclear Reconnaissance System Operator (JCBRNRS) LAV Operator