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74D CBRN Specialist

U.S. Army
Equivalent: 5711 (USMC CBRN Defense Specialist)
Formerly: 54B Chemical Operations Specialist (pre-1999), Nuclear, Biological, Chemical (NBC) Specialist
The 74D CBRN (Chemical, Biological, Radiological, Nuclear) Specialist detects, identifies, and decontaminates CBRN hazards. Training and operations involve exposure to chemical agents, radiological materials, and biological hazards in controlled and field environments. Post-9/11 deployments added combat exposure to the traditional CBRN mission.
OCCUPATIONAL HAZARDS & PHYSICAL DEMANDS
-Working in full MOPP gear (Mission Oriented Protective Posture) — heat stress, restricted breathing
-Chemical agent exposure during training (CS, OC, controlled agent training at CDTF)
-Heavy equipment operation (decontamination systems, M26 JLIST, M12A1)
-Extended physical activity in protective equipment (20+ lbs additional weight, restricted mobility)
-Deployed: convoy operations, base defense, plus CBRN mission
-Exposure to depleted uranium, burn pit smoke, industrial chemicals during deployment
SERVICE-CONNECTED CONDITIONS (7 MAPPED)
Tap a condition to expand. Use the links inside to learn more, check your rating, or prep for your exam.
PTSDDC 9411
HIGH
Typical Ratings: 30%, 50%, 70%
Combat deployment exposure plus unique stressor of CBRN threat awareness — constantly assessing for chemical/biological attack. Fear of contamination is a recognized stressor.
38 C.F.R. 3.304(f)
SinusitisDC 6510-6514
VERY HIGH
Typical Ratings: 0%, 10%, 30%
Repeated CS gas exposure during training, chemical agent training, mask drills. Chronic irritation of sinus membranes.
38 C.F.R. 4.97, DC 6510-6514
AsthmaDC 6602
HIGH
Typical Ratings: 10%, 30%, 60%
Chemical agent exposure, burn pit smoke, MOPP gear restricting breathing patterns. Reactive airway disease from repeated irritant exposure.
38 C.F.R. 4.97, DC 6602
Lumbar Spine (DDD/Strain)DC 5237-5243
HIGH
Typical Ratings: 10%, 20%
Operating heavy decontamination equipment, working in restrictive MOPP gear, deployment load carriage.
38 C.F.R. 4.71a, DC 5237-5243
Skin ConditionsDC 7806-7813
HIGH
Typical Ratings: 10%, 30%, 60%
Chemical agent skin exposure during training, extended wear of MOPP suit causing skin breakdown, contact dermatitis from decontamination chemicals.
38 C.F.R. 4.118, DC 7806
TinnitusDC 6260
MODERATE
Typical Ratings: 10%
Weapons qualification, generator noise during decontamination operations, vehicle noise.
38 C.F.R. 4.87, DC 6260
Burn Pit / Toxic Exposure (PACT Act)DC Various
HIGH (if deployed post-9/11)
Typical Ratings: 0%, 10%, 30%, 60%
CBRN specialists have documented occupational exposure to toxic substances beyond typical burn pit exposure. PACT Act presumptive applies.
Public Law 117-168 (PACT Act)
TYPICAL RATING CONSTELLATION
A 74D with deployment commonly has: PTSD (50%), sinusitis (10-30%), asthma/respiratory (10-30%), lumbar spine (10-20%), skin condition (10-30%), tinnitus (10%), toxic exposure. Combined: 70-90%.
KEY CLAIM TIP
74D veterans have UNIQUE toxic exposure documentation that other MOS codes lack. Your training records document controlled chemical agent exposure. Combined with deployment burn pit exposure, you have a dual-path claim: occupational chemical exposure AND PACT Act presumptive. Preserve all training records from CDTF and any chemical exposure documentation.
YOUR NEXT STEPS
RELATED MOS
68W57114B0
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NOT AFFILIATED WITH THE U.S. DEPARTMENT OF VETERANS AFFAIRS.
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