Chemical, Biological, Radiological, and Nuclear (CBRN)

You are the battalion's CBRN subject-matter expert before you have earned the right to call yourself one. The unit will treat you as the expert from day one — your job is to close the gap between the title and the knowledge, fast.

CBRN BOLC at the Chemical, Biological, Radiological, and Nuclear School at Fort Leonard Wood runs you through detection, decontamination, smoke and obscurant operations, CBRN reconnaissance, and the CBRN staff-officer foundation that will follow you the rest of your career. From there you land in a CBRN Company as a platoon leader — running a CBRN recon platoon, a decontamination platoon, or a smoke and obscurant platoon depending on the unit — or you fill a junior CBRN staff position at a battalion, brigade, or division as the Chemical Officer. Your platoon sergeant (typically an SFC with multiple cycles on CBRN equipment) runs the daily tactical execution; you run the planning, training resourcing, OPORDs, and the visible work the company commander reads for your OER. Outside the platoon, you are the unit's CBRN advisor — that means pre-deployment threat briefs, individual protective equipment accountability, detector maintenance programs, and the unglamorous detail of keeping MOPP training current in a unit that is mentally elsewhere. Field problems and CTC rotations are where the job gets real: you set up decon sites, you run recon routes, and you discover that a CBRN platoon in a CTC rotation is busiest at the worst possible moment of every battle day.

• 01Plan and execute a hasty and deliberate decontamination operation — individual, operator/crew, vehicle, and thorough levels — per ATP 3-11.32, with a site sketch, water plan, and throughput estimate the supported commander can actually use.
• 02Operate, field-strip, and perform operator-level maintenance on CBRN detection equipment organic to the platoon — M8A1 ACADA, M93A1 NBC Reconnaissance System (Fox), M1 ACAMS, M256A1/A2 detection kit, and the Joint Service Lightweight Standoff Chemical Agent Detector (JSLSCAD) family.
• 03Brief a CBRN threat estimate to a BN or BCT commander — threat agents by type (persistent/non-persistent/blister/blood), hazard area prediction using JCAD/HPAC or manual D6C/CAMEO MARPLOT downwind hazard methodology, and the recommended COA.
• 04Plan smoke and obscurant operations per ATP 3-11.50 — employment types (screening, obscuring, blinding, deceiving), generator type selection, meteorological conditions assessment, and coordination with aviation and maneuver fires.
• 05Run individual MOPP gear accountability, inspection, and training — MOPP Level 0-4 drill cadence, mask confidence lane, buddy-team check procedures, decontamination of individual equipment — for a platoon-size element.
• 06Draft the CBRN annex (Annex B) to a BN or BCT OPORD — threat summary, CBRN IPB products, MOPP posture plan, decon plan, contamination avoidance measures — at the level the BN S-3 signs without a rewrite.

• —FM 3-11 — Chemical, Biological, Radiological, and Nuclear Operations (branch doctrine; read cover to cover before your first BN commander's call).
• —ATP 3-11.32 — Multi-Service Tactics, Techniques, and Procedures for Chemical, Biological, Radiological, and Nuclear Decontamination (the decontamination TTP; your platoon runs against this).
• —ATP 3-11.36 — Multi-Service Tactics, Techniques, and Procedures for Chemical, Biological, Radiological, and Nuclear Aspects of Command and Control (the staff-officer backbone).
• —ATP 3-11.50 — Smoke and Obscurant Operations (required reading before any smoke employment brief).
• —JP 3-41 — Chemical, Biological, Radiological, and Nuclear Consequence Management (joint CBRN-CM doctrine; sets the frame for WMD-CM operations you may support).
• —DA PAM 600-3 — Officer Professional Development and Career Management (Chemical Corps chapter; read the KD sequence and functional area options before your first OER cycle).

• —CBRN BOLC graduate — the school's technical and tactical standards are the baseline the gaining unit expects you to exceed, not just meet.
• —Successful CBRN lane execution at a CTC rotation (JRTC, NTC, or JMRC) — the decon site stood up on time, the recon routes were covered, the annex was defensible.
• —Full individual protective equipment accountability for the platoon — mask, MOPP suit, boots, gloves — with no discrepancies on the unannounced inspection the company commander or CSM runs.
• —ACFT pass at the officer standard — CBRN does not get a fitness exemption for having a technically demanding job.
• —First OER with a senior rater bullet tied to measurable CBRN outcomes — training events executed, soldiers certified, decon site throughput from the last CTC, detection equipment readiness rate.

• —Running a MOPP training event that is theatre, not training — masks donned and doffed but never buddy-checked, contamination lanes never scrubbed for technique. The CTC CBRN observer-controller grades your unit, not your lane plan.
• —Letting CBRN detection equipment sit in the motorpool with lapsed operator maintenance — the M93A1 Fox alarms you need at the CTC rotation are the ones with dead batteries and expired detector paper that were last PM'd six months ago.
• —Drafting a CBRN annex that copies last rotation's template without updating the threat, the METL, or the decon site location. The BN S-3 will read it in the OPORD brief and the company commander will read it on your OER.
• —Trying to be the NCO in the decon site instead of the officer running the plan. Your platoon sergeant builds the station rotation; you build the scheme of support, the water plan, and the brief to the supported commander.
• —Signing for CBRN equipment sets — M8A1 ACADA, M93A1 Fox vehicles, collective protection unit — without a physical inventory and an operator qualification check. You will own the discrepancy, not the previous LT.

The good 74A LT is the one the BCT CBRN officer puts on the annex for the next CTC rotation because it will come back technically sound, the decon site will be up at H-hour, and the BN CDR will tell the brigade that CBRN was not the friction point this rotation. By month twelve the company commander is letting him run the brigade-level CBRN training day; by month eighteen the BN S-3 is pulling his annex as the template. His detection equipment is PM'd, his MOPP accountability is clean, and his OER reads "technically fluent; select for advanced schooling."

You are the senior CBRN officer the brigade trusts to tell them the truth about a contamination scenario — not the one who makes the threat sound manageable to avoid slowing the operation. That honesty, delivered to a BCT commander's face, is the whole job.

You return to Fort Leonard Wood for the Chemical Captains Career Course (C4) — focused on CBRN company-level operations, BCT/DIV staff integration, WMD consequence management at the operational level, CBRN defense planning, and the joint framing that comes with JP 3-41. From C4 you slate to a KD: CBRN Company Command (the primary captain-level KD — a CBRN company in a maneuver BCT or a multifunctional CBRN battalion is 80-150 soldiers running recon, decon, and smoke platoons), BCT Chemical Officer (the brigade S-3 section CBRN advisor, running the CBRN annex to every operations order the BCT issues), or Division Chemical Officer (the CBRN staff integration seat at echelon above brigade — where the joint and interagency CBRN-CM coordination begins). After KD the competition for major and post-command billets runs through CGSC (resident at Fort Leavenworth or non-resident) and the joint-assignment market. CBRN officers with the right profile move to DTRA (Defense Threat Reduction Agency), the DoD CBRN Directorate, DHS CWMD Office, NORTHCOM J3-CBRN, SOCOM support roles, the OSD Chemical and Biological Defense Program, and interagency CBRN-CM assignments. The WMD-civil support mission is real and growing — Weapons of Mass Destruction Civil Support Teams (WMD-CSTs) are National Guard-specific but the active-duty CBRN officer community intersects with them through exercises and the CBRN response enterprise.

• 01Command a CBRN Company — train, certify, deploy, and sustain a 80-150 soldier formation (recon, decon, smoke platoons, company headquarters) through a CTC rotation or real-world contingency with property accountability clean and no-notice readiness inspections survived.
• 02Function as the senior CBRN advisor at BCT or division staff level — write the CBRN annex to every OPORD, run the CBRN working group, brief the BCT or DIV CDR on threat and hazard assessments that inform COA selection, and represent CBRN equities at the battle update briefing without being the officer who always says "the CBRN environment is manageable."
• 03Execute or plan a WMD consequence management (WMD-CM) operation per JP 3-41 — site assessment, contamination control, technical decontamination, sensitive-site exploitation coordination, and interagency hand-off to FEMA, DHS, HHS, and the WMD-CST.
• 04Mentor a platoon of lieutenants and NCO bench through KD time, schools, and OER/NCOER cycles — your OERs on them and their retention shape the next CBRN cohort at a branch that is small enough that every departure is noticed.
• 05Translate CBRN risk to a maneuver or joint commander in a language they will repeat accurately to the next echelon — hazard predictions, MOPP posture recommendations, decon resource requirements, contamination avoidance priority routes — without either overstating the threat or soft-pedaling it to avoid slowing the operation.
• 06Make the post-command branch/functional-area decision honestly — FA52 (Nuclear and Counterproliferation Officer), FA3F/FA40 joint fire or space paths, staying in the CBRN branch for battalion-command consideration, or the interagency (DTRA, DHS CWMD, ODNI) market — against your actual talent profile and the billets available at the 10-12 year mark.

• —FM 3-11 — CBRN Operations; ATP 3-11.32 — CBRN Decontamination; ATP 3-11.36 — CBRN Command and Control Aspects; ATP 3-11.50 — Smoke and Obscurant Operations.
• —JP 3-41 — Chemical, Biological, Radiological, and Nuclear Consequence Management (the operational and strategic framing for WMD-CM you now plan and brief at higher echelon).
• —ATP 3-11.23 — Multi-Service Tactics, Techniques, and Procedures for the Tactical Employment of Chemical Agent Detectors (the detection-system employment TTP for the company-command and staff-officer level).
• —AR 600-20 — Army Command Policy; AR 623-3 — Evaluation Reporting System; AR 350-1 — Army Training; AR 600-8-29 — Officer Promotions (DOPMA rules, competitive-zone timelines).
• —DA PAM 600-3 — Officer Professional Development and Career Management (Chemical Corps and FA52 chapters; read the post-command and senior-officer billet options before C4 graduation).
• —ADP 6-0 — Mission Command; JP 1 — Doctrine for the Armed Forces of the United States (joint framing the post-KD staff environment will test you on).

• —C4 (Chemical Captains Career Course) graduate; ILE / CGSC slate at Fort Leavenworth (resident or non-resident) before the major's board.
• —Successful KD OER — CBRN Company Command or BCT Chemical Officer or Division Chemical Officer — with a senior rater profile tied to measurable outcomes: CTC rotation result, CBRN training throughput, detection equipment readiness, WMD-CM exercise execution.
• —JDAL (Joint Duty Assignment List) credit on the path to O-4 / O-5 — the CBRN branch values joint exposure (DTRA, NORTHCOM J3, SOCOM support, USCYBERCOM-adjacent WMD-CM billets) more than many branches and the post-command billet market reflects it.
• —For the centralized major's board: pull the current HRC OPMD board release — promotion-zone math under DOPMA and published board demographics under AR 600-8-29 are the only honest source for selection rates.
• —CBRN company's individual protective equipment readiness and collective protection systems current at the FORSCOM readiness standard — the division G-3 readiness roll-up shows the Chemical Corps's contribution.

• —Treating company command as a CBRN-technical problem. The KD is a soldier problem, a property-accountability problem, and a leadership problem — the CBRN expertise is the floor, not the ceiling. The brigade CDR and the division CSM are watching the formation, not the hazard-area prediction.
• —Soft-pedaling a contamination scenario to the BCT commander because the honest assessment would slow the operation. The brigade finds out after the CTC CBRN OC/T readout — and the OER conversation is short.
• —Letting the CBRN company's MOPP training drift to theatre during the pre-deployment period because the maneuver BCT is consuming all the training calendar. You own the CBRN training program; a contaminated formation at the CTC rotation is the company commander's signature.
• —Skipping the FA / branch-transfer conversation because "I am a Chemical officer." DA PAM 600-3's FA52 chapter and the interagency market exist for a reason; captains who avoid the conversation until the major's board is six months out are captains who run out of options.
• —Confusing CBRN planning expertise with WMD-CM and interagency expertise. The DHS, FEMA, HHS, and National Guard WMD-CST lanes require deliberate study of JP 3-41 and the FEMA National Response Framework — faking depth at a senior-level CBRN exercise is visible in the first working group.

The good 74A captain commanded a CBRN company that passed the no-notice readiness inspection, survived the CTC rotation with detection equipment operational and a decon site that the OC/T graded as tactically sound, and turned over a formation the next CO did not have to repair. As a major he is on a division chemical officer or joint-CBRN staff slate at DTRA, NORTHCOM, SOCOM, or OSD — ILE complete, the FA52 conversation made honestly, and the brigade CDR's OER reads "CBRN is not the problem on this BCT's staff; select for battalion command." Pull the current HRC board release for the actual major's board demographics.