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0861E5

Fire Support Marine

E-5 (Sergeant) · Marines

E1–E3E-4E-5E-6E-7E8–E9
HEADS UP

The fire support team is yours. Two to four fire support Marines, the infantry company you are embedded with, and the company commander counting on you to integrate every available fire support asset — artillery, mortars, CAS, naval gunfire — into his scheme of maneuver without killing his own Marines. JFO qualification is non-negotiable at this rank. The Sergeants Course is the PME gate; the SSgt selection board reads your FitReps, your fire support record, and the infantry company commander's read on whether the fires were on time, on target, and safe.

The Honest MOS Read
Sergeant in the 0861 community is the FIST chief — the fire support team leader and the Marine Corps's fires integration point at the infantry company level. This is the billet where the 0861 MOS becomes operationally consequential in the most direct way possible: you plan the company's fires, you call them, you coordinate them with the battalion FSC, and if the fires hit friendlies, you own the failure personally, professionally, and legally. The FIST chief's daily work operates on two parallel tracks: the fires track and the people track. The fires track is the company fire support plan — targets, triggers, priority of fires, fire support coordination measures, on-call missions, the CAS integration when a JTAC is available, the naval gunfire coordination during amphibious operations, and the mortar coordination with the company's organic 60mm and the battalion's 81mm sections. You build the fire support annex to the company OPORD. You brief it at the company OPORD to the company commander, the platoon commanders, and the platoon sergeants. You coordinate with the battalion FSC (Fire Support Coordinator) on coordination measures, target deconfliction, and fires priority — because the company fire support plan that conflicts with the battalion fire support plan produces coordination measure violations that put friendly forces at risk. When the fight starts, you are the Marine on the radio calling fires. You call for fire, adjust rounds, manage the fire support coordination measures in real time as the company maneuvers, and integrate CAS when the JTAC clears the stack. You split the team when two platoons need fire support simultaneously — you take one platoon, your Cpl takes the other — and you manage both fires situations while tracking the company's coordination measures across the full frontage. The FIST chief who cannot simultaneously call fires, track coordination measures, and manage the team is the FIST chief who produces a fratricide or a coordination measure violation — and either one is a career-ending fire support failure. The people track is FitReps and development. You write FitReps on your fire support Marines under MCO 1610.7 — Section A narrative, attribute evaluations, and relative value placement. The FitRep is the annual document the reporting senior builds on your input. A Section A that describes what the Cpl did — 'Cpl [name] called fires independently for 2nd Platoon during the ITX company attack, adjusted two missions onto confirmed enemy positions within the battery's time standard, and maintained fire support coordination without a callback' — is the Section A that survives the battery FitRep review. A Section A that reads like a recommendation letter gets rewritten. JFO qualification is non-negotiable at the FIST chief rank. The JFO credential authorizes you to provide targeting data for CAS terminal attack control under the JTAC's authority — Type 2/3 control, the CAS 9-line brief, coordination with the stack on the CAS frequency. Without JFO, the FIST chief can only call artillery. With JFO, the FIST chief integrates the full spectrum of fire support — and the infantry company commander who has a JFO-qualified FIST chief has a fundamentally different fires capability than the one who does not. The Sergeants Course is the PME gate. Career Course follows on the SSgt timeline. The SSgt selection board reads PME completion, FitRep relative value, JFO qualification, and the infantry company commander's read on the FIST chief's fire support performance. In a small MOS, the fires community knows every FIST chief by name and reputation within a year — the reputation is the career. The MEU cycle structures the operational rhythm. As FIST chief, you run fire support during the PTP workup — building the company fire support plan for each training event, certifying the team during ITX, and deploying the team as part of the BLT on the MEU. The ITX rotation at Twentynine Palms is where the MAGTFTC evaluator reads the FIST chief's fire support performance — every fire support plan, every CFF transmission, every coordination measure management decision. The evaluator's read travels to the battalion FSC's FitRep input on you. The honest identity reality at Sgt 0861: you live with the infantry, you fight with the infantry, and the infantry judges you by one metric — whether the fires were on time, on target, and safe. Every call for fire that is accurate earns trust. Every call that is late, inaccurate, or dangerous erodes it. The infantry company commander who trusts the FIST chief asks the battalion to keep him for the next deployment. The one who does not trusts the FIST chief asks the battalion for a replacement. In a small MOS, both requests define the career.
Career Arc
  • 01Sgt pin-on via composite score cutting score under MCO 1400.32.
  • 02FIST chief assumption — 2-4 fire support Marines, embedded with an infantry company, fire support plan development and execution.
  • 03JFO (Joint Fires Observer) qualification — non-negotiable at this rank; the credential that integrates the full spectrum of fire support.
  • 04Sergeants Course PME completion — required for SSgt board competitiveness.
  • 05MEU PTP workup and deployment as FIST chief — fire support integration during ITX, MEU deployment.
  • 06FitRep writing on fire support Marines under MCO 1610.7 — Section A input, attribute marks, relative value.
  • 07Career Course PME — preparation for SSgt selection board.
  • 08SSgt centralized selection board — paper-record, FitRep-driven.
Common Screwups
  • ×Phoning the FIST chief role. The infantry company's fires capability is the FIST chief's capability. The infantry company commander reads it at every fire support event; the battalion FSC reads it at every targeting meeting; the SSgt board reads the FitRep that records it.
  • ×Missing JFO qualification. The FIST chief without JFO cannot integrate joint fires — CAS, naval gunfire, the full spectrum. The infantry company commander deserves a FIST chief who can.
  • ×NJP / DUI / fraternization — separation under MARCORSEPMAN, clearance revocation. In a small MOS embedded with the infantry, the institutional memory is permanent.
  • ×FitRep drift. The Marine FitRep system weights heavily in the SSgt selection board. Sloppy Section A narratives or inflated relative value the reporting senior does not defend propagate through the record.
  • ×Building a fire support plan that looks good on the overlay but has not been coordinated with the battalion FSC. The company fire support plan that conflicts with the battalion fire support plan produces coordination measure violations — and coordination measure violations put friendly forces at risk.

A Day in the Life

  • 0500Wake. Phone check — infantry company group chat, FIST team group chat. Any overnight changes, any alert status, any issues with fire support Marines or the infantry company. PT uniform on.
  • 0530-0700PT with the infantry company. You take accountability for your fire support Marines, report to the infantry company formation. You set the pace for the fire support team. The infantry company watches whether the FIST chief can carry the load — and the company commander watches whether the fire support team keeps up with his Marines.
  • 0700-0830Hygiene, chow, change into utilities. Check fire support equipment — radios, LLDR, DAGR, CEOI, batteries. Review the current fire support coordination measures from the FSC. Check the company training schedule for today's fire support integration requirements.
  • 0830Morning formation with the infantry company. Brief your fire support Marines on the day's tasking. The company commander may pull you aside for a fire support coordination discussion before the day's training event.
  • 0900-1130Morning work. If the infantry company is running a training event — platoon attack, company defense, patrol — you are integrated, running fire support from the FIST position, calling simulated fires, managing coordination measures, and briefing the company commander on fires status. If it is a dedicated fire support training day, you run the FIST through CFF drills, fire support plan development, JFO procedures, and CAS integration rehearsals. Coordinate with the battalion FSC on upcoming exercises.
  • 1130-1300Chow with the infantry company. Mentoring with your Cpls — JFO qualification timeline, CFF technique, fire support plan development, composite score review, career counseling.
  • 1300-1500Afternoon work. Fire support plan development for the company's next field exercise. Coordinate with the battalion FSC on coordination measures and target deconfliction. FitRep Section A drafting (during the rating cycle). Counsel fire support Marines on proficiency, career progression, and JFO preparation. Train junior Marines on CFF procedures.
  • 1500-1630Final formation. Sensitive items check — radios, LLDR, DAGR, crypto. Equipment status. Brief the fire support team on tomorrow's priorities. Coordinate with the infantry platoon commanders on fire support integration for the week.
  • 1630Liberty call (garrison). Field problems and MEU workup break the schedule entirely.
  • 1700-2000Personal time. Family time if married and off-base. Otherwise: gym, PME study for Sergeants Course or Career Course, MCMAP sustainment, JFO recertification study, civilian college through Tuition Assistance.
  • 2000-2200If a fire support Marine calls with a problem — financial, personal, legal, family — the FIST chief is the first call. The FIST chief who answers the phone and handles it before the battery gunny hears about it is the FIST chief the team trusts.
  • FTX / ITX at MCAGCC Twentynine PalmsGarrison schedule breaks. You are embedded with the infantry company in the field, running fire support for the company fight. You build the fire support plan, brief it at the company OPORD, call fires during the execution, manage coordination measures in real time, split the team when two platoons need fires simultaneously, and coordinate with the battalion FSC throughout. Sleep is in shifts. The MAGTFTC evaluator reads the FIST chief — every fire support plan, every CFF transmission, every coordination measure decision. The evaluator's read becomes the FSC's FitRep input.
  • MEU deployment afloatFIST chief on the BLT. Fire support integration in amphibious operations — naval gunfire coordination, CAS integration with MEU aviation, fire support planning for contingency response operations. You are the fires expert the infantry company commander turns to during every MEU planning event. Port visits when granted. The MEU deployment is the operational proving ground for the FIST chief.

Weekly Cadence

The Mon-Fri rhythm at Sgt runs on the infantry company's training schedule and the fire support training plan you build around it. Monday is the planning day — the company commander puts out the week's training schedule, the battalion FSC puts out any coordination measure changes, and you translate both into the fire support team's weekly plan: which infantry training events include fire support integration, which days are dedicated fire support training, which days the team participates as riflemen. Monday afternoon is the first counseling slot for any fire support Marine who needs a career sit-down, a JFO timeline discussion, or a proficiency review. Tuesday through Thursday is the core training and operational block. Fire support integration into infantry company training — simulated CFF during squad attacks, fire support plan development for company exercises, CAS integration rehearsals, JFO procedures practice. When the company is running a battalion-level exercise, the fire support training is live — CFF transmissions on the fire support net, coordination with the FSC, and coordination measure management in real time. Each Cpl runs fire support for one platoon when the team splits; you supervise, AAR honestly, and run the drill again. Friday is administrative: FitRep Section A drafting (during the rating cycle), counseling sessions with fire support Marines, equipment maintenance, and the battalion FSC's weekly fire support coordination meeting. The FSC debriefs the week's fire support performance across all FISTs — what each team got right, what each team missed, and what the FISTs need to train before the next exercise. The MEU PTP workup compresses everything. Field problems become continuous fire support operations — building fire support plans for each phase, calling fires on a live timeline, managing coordination measures across a company frontage while the company maneuvers. The FIST chief runs the team 16-18 hours a day during PTP field problems. The garrison fire support drills that felt repetitive become the muscle memory that produces accurate, safe fires under pressure. ITX at Twentynine Palms is the final test — the MAGTFTC evaluator reads the FIST chief's fire support performance, and the evaluator's read becomes the battalion FSC's FitRep input that travels to the SSgt selection board.

Key Skills — How to Drill Each

  1. 01
    Build a company fire support plan that integrates artillery, mortars, CAS, and naval gunfire into the company commander's scheme of maneuver — targets, triggers, priority of fires, coordination measures, on-call missions — and brief it during the company OPORD.
    The fire support plan is the product that makes you the fires expert the company commander trusts. Build it in layers: start with the company commander's scheme of maneuver, identify the targets that support the scheme, assign triggers (conditions under which fires are called), establish priority of fires, overlay the fire support coordination measures (no-fire areas, restricted fire areas, boundaries), and pre-plan on-call missions the platoon commanders can request with a single call sign. Coordinate the plan with the battalion FSC before the OPORD to ensure deconfliction with the battalion fire support plan. Brief it at the OPORD in under ten minutes — the company commander needs a fire support plan he can execute during the fight, not a graduate seminar on fires theory.
  2. 02
    Call for fire and adjust fires independently as the FIST chief while simultaneously managing the company's fire support coordination.
    This is the hard part. The FIST chief calls fires on the fire support net while tracking coordination measures that change as the company maneuvers, managing the CAS frequency if a JTAC is working the stack, and monitoring the company tactical net for friendly position updates that affect the coordination measures. Practice calling fires while tracking coordination measures during every garrison fire support exercise. The FIST chief who can hold both tracks simultaneously — fires execution and coordination management — is the FIST chief who produces fires that are on time, on target, and safe. The one who drops the coordination track under stress produces the fratricide.
  3. 03
    Write FitReps on your fire support Marines per cycle under MCO 1610.7.
    FitRep Section A under MCO 1610.7 is the narrative that drives the attribute marks. Write in observed-behavior terms — 'Cpl [name] called fires independently for 2nd Platoon during the ITX company attack, adjusted two missions onto confirmed enemy positions within the battery's time standard, and maintained coordination without a callback' is a sentence the reporting senior defends. 'Outstanding fire support Marine, best in the team' is a sentence the reporting senior rewrites. Write 200 specific words instead of 400 generic ones.
  4. 04
    Operate as a qualified JFO — provide Type 2/3 CAS terminal guidance under the JTAC's authority, talk to the CAS stack, provide targeting data for precision and area weapons, and coordinate joint fires with the JTAC and the FSC.
    JFO operation is the skill that makes the FIST chief a joint fires integrator instead of an artillery caller. When the JTAC clears the stack, you provide the 9-line brief — target location, target description, target marking, friendly position, guidance for the attack. Practice the CAS 9-line until it is reflex. Coordinate with the JTAC before the operation — what frequencies, what call signs, what types of CAS assets are available. The FIST chief who can seamlessly switch from calling artillery on the fire support net to coordinating CAS on the CAS net to managing coordination measures on the company net is the FIST chief the infantry company commander values most.
  5. 05
    Coordinate with the battalion FSC on fire support coordination measures, target deconfliction, and fires priority.
    The FSC coordinates fires at the battalion level. Your company fire support plan must nest within the FSC's battalion fire support plan. Coordinate before the OPORD — walk the measures with the FSC, deconflict targets with adjacent company FISTs, and confirm fires priority. During execution, monitor the FSC net for coordination measure changes that affect your company's fires. The FIST chief who coordinates with the FSC produces fires that are deconflicted. The one who operates in isolation produces fires that may conflict with adjacent company fires or violate battalion-level coordination measures.
  6. 06
    Mentor your fire support Marines into JFO-qualified, Sergeants Course-ready candidates who can split from the team and call fires independently.
    Monthly counseling on JFO qualification timeline, composite score status, CFF proficiency, and fire support plan development. Each Cpl should have a training progression from CFF drills to independent fire support execution to fire support plan development. The FIST chief who develops JFO-qualified Cpls by the Sgt board is the FIST chief the battery gunny remembers — because the infantry company commander had two JFO-qualified fire support Marines instead of one.

Manuals & References — What Chapters Matter

  • MCWP 3-16 — Fire Support Coordination in the Ground Combat Element
    You own this manual at the FIST chief level. FIST employment, fire support planning, coordination measures, and the FIST chief's role in the company fight — every chapter is directly relevant to your daily work. The company commander quotes MCWP 3-16 when he asks you about the fire support plan; the battalion FSC quotes it when he asks about your coordination measures. The FIST chief who has internalized MCWP 3-16 produces fire support plans that survive contact.
  • JP 3-09 — Joint Fire Support
    Joint fire support doctrine — JFO procedures, naval gunfire coordination, CAS integration, and joint fires coordination. At the FIST chief level, you operate as a JFO integrating joint fires into the company fight. Read the JFO chapter as the operating manual for your most consequential credential.
  • JP 3-09.3 — Close Air Support
    CAS procedures, Type 1/2/3 control, and the JFO's role in providing targeting data to the JTAC. The FIST chief who understands JP 3-09.3 coordinates CAS with the JTAC efficiently — the 9-line brief is clean, the target description is accurate, and the guidance for the attack is specific enough for the pilot to execute on the first pass.
  • NAVMC 3500.44 — Marine Corps Artillery T&R Manual (FIST chief collective tasks)
    The source of every collective task the battalion FSC evaluates your team against. The FIST chief collective tasks are the tasks you train the team to meet and the tasks the evaluator grades during MCCRE and ITX. Build the garrison fire support training schedule around these tasks.
  • MCO 1610.7 — Performance Evaluation System
    You write FitReps now. The FitRep policy chapter, the Section A guidance, the attribute marks rubric, and the reporting/reviewing officer responsibilities. The FIST chief who understands the relative-value math writes FitReps that survive the battery FitRep review — and the FitReps you write on your Marines reflect on your own record.
  • MCO 1400.32 — Marine Corps Promotion Manual
    The SNCO board mechanics that now govern your career. The SSgt selection board reads your full record — FitReps, composite scores, PME completion, JFO qualification, awards, education. Understand the board's relative-value mechanic and build a record aligned to it. The FIST chief who understands the SNCO board three years out is the FIST chief who is competitive when the board meets.

Standards — How to Hit Each

  • Sergeants Course graduate — required PME gate for SSgt board.
    Sergeants Course at a regional NCO academy in-residence or via CDET. In-residence is materially better. Career Course follows on the SSgt timeline — the SSgt board reads PME completion. Schedule both with the FIST chief and the battery gunny.
  • JFO (Joint Fires Observer) qualified — the non-negotiable credential at the FIST chief rank.
    A FIST chief without JFO cannot integrate joint fires. The infantry company commander who has a JFO-qualified FIST chief has a fundamentally different fire support capability than the one who does not. If you are not JFO-qualified at the time you pin Sgt and assume the FIST chief billet, pursue the qualification immediately — the first JFO slot that drops is your slot.
  • Brown Belt MCMAP minimum; Black Belt is what the battery gunny notes going to the SSgt board.
    Brown Belt is the bar at Sgt. Black Belt is the differentiator. You train with the infantry; the MCMAP standard is the infantry standard. Schedule the belt progression with the infantry battalion's MCMAP instructor and build it into the annual training timeline.
  • 1st-Class PFT and CFT — you hump with the infantry company.
    The infantry company's pace is your pace. Carry everything they carry plus radios, LLDR, and batteries. Below 1st-Class, the grunts start wondering. The FIST chief who hits 1st-Class sets the standard for the fire support team; the infantry company reads it.
  • Composite score tracked monthly; pull the current MARADMIN cutting score for 0861 to SSgt.
    The SSgt board is FitRep-driven, but the composite score still feeds the board's read. Stack every point — PFT/CFT, rifle qual, MCMAP, JFO, awards, education credits, pro/con marks. The FIST chief who shows up to the career planner with a plan gets the best answer.

Technical Mistakes — Concrete Consequences

  • Verbal counseling only — no page-11 entry, no formal counseling on file.
    If it is not in writing it did not happen. When a Marine appeals or files an IG complaint, the chain pulls every counseling on file. A verbal counseling is invisible. Five minutes typing a page-11 entry saves a year of legal defense for you and the battery commander.
  • Building a fire support plan that has not been coordinated with the battalion FSC.
    The company fire support plan that conflicts with the battalion fire support plan produces coordination measure violations. A coordination measure violation means fires went where they were not supposed to go — and if that place has friendly forces, the investigation traces the fire support plan to the FIST chief who did not coordinate with the FSC. The conversation the FIST chief avoided before the OPORD becomes the investigation he cannot avoid after the incident.
  • Calling for fire on a target without checking the grid against current friendly positions and coordination measures.
    The FIST chief who fires on friendlies or into a no-fire area has committed the worst failure in fire support. At the Sgt level, you are the senior fire support Marine at the company level — there is no one behind you to catch the error. 'The measures changed and I did not know' means you were not tracking the FSC net. The investigation, the legal proceedings, and the career consequences are all the FIST chief's.
  • Failing to split the team when two platoons need fire support simultaneously.
    The FIST chief who keeps both fire support Marines with him leaves one platoon without fires. The infantry platoon that needed fire support and did not get it because the FIST chief did not split the team remembers — and the company commander writes the FitRep. Two platoons in contact with one FO is a planning failure, not a resource constraint.
  • Doing the fire support coordination yourself instead of teaching the Cpl to do it.
    The team fails when you go to Sergeants Course. The Cpl who has never built a fire support plan or managed coordination measures independently cannot do it cold when the FIST chief is gone. The infantry company that loses its fires capability because the FIST chief never trained his backup requests a different team. The FIST chief's job is to develop JFO-qualified, independent fire support Marines — not to make himself the single point of failure.

Career Decisions at This Rank

  • Stay 0861 and compete for SSgt battalion fire support chief billet vs. lateral move to another fires MOS
    At Sgt, the career trajectory narrows. The 0861 SSgt billet is the battalion fire support chief — the senior enlisted fire support Marine managing three to five FISTs and advising the battalion FSC. The community is small; the billets are specific. The alternative is a lateral move to the gun line (0811) or to the targeting community (0847) — different seats, different daily lives. The 0861 Sgt who loves being forward with the infantry, calling fires, and integrating joint fires stays 0861. The one who wants a broader fires career should explore the alternatives. Both are valid — the question is which seat matches your strengths and your identity.
  • B-billet pipeline at Sgt — DI duty, recruiter, MSG, instructor billet
    B-billet at Sgt is career broadening. DI duty at MCRD is ~3 years and is visible at the SSgt and GySgt boards — many SgtMajs came up through DI duty. MSG opens embassy postings. Recruiter duty puts you in a small civilian community as the face of the Marine Corps. Each B-billet is visible at the SSgt board. The cost: the 0861 fire support depth does not grow during a B-billet, and the FIST chief billet is time-constrained — the window for the career-defining assignment narrows if you leave for three years. Talk to Marines who have done the tour.
  • Career Course in-residence vs. CDET
    Career Course is the PME tier between Sergeants Course and the SNCO Academy. In-residence is better. The SSgt board reads PME completion. Schedule with the battery gunny and the career planner.
  • Reenlistment at Sgt — sign for the bonus, indef, or EAS
    Reenlistment at Sgt is the consequential math. SRB tier and bonus amounts for 0861 are published in current MARADMIN messages. The Sgt who reenlists has the SSgt-to-battalion-fire-support-chief trajectory ahead and the 20-year career path. The Sgt who EAS has JFO qualification, fire support planning experience, joint fires integration experience, and infantry-embedded credibility — all of which translate to defense contracting, federal LE, and the fire support instructor/consultant market. The post-service market pays significantly more for a JFO-qualified FIST chief with Sgt experience than for a Cpl who left at four years. The career planner conversation is structured — show up with a plan.
  • Commissioning — MECEP, ECP, or stay enlisted to compete for SSgt
    For Sgts with college credits or a degree, MECEP and ECP are open. MECEP keeps active-duty pay while completing the degree; ECP is direct commission with a degree. The honest test: are you better at calling fires and running a FIST, or at planning fires at the company and battalion level as an officer? The 0861 Sgt who loves the FIST chief billet is probably better suited to the fire support SNCO track. The one who keeps asking 'why is the fire support architecture structured this way' may be the one who should commission as a fires officer.

How the Seat Varies by Unit Type

  • Infantry battalion (1st/2nd/3rd MarDiv) — FIST embedded with a rifle company
    The default Sgt 0861 assignment — FIST chief embedded with an infantry company. The company commander is your primary supported commander; the battalion FSC is your fires coordination authority. The MEU deployment cycle structures the experience. The FIST chief here builds the fire support reputation that defines the SSgt board read — and the infantry company commander's FitRep input is the input that matters most.
  • MEU BLT — afloat
    FIST chief on the BLT embarked on amphibious shipping. Fire support in amphibious operations includes naval gunfire coordination, CAS integration with MEU aviation (Cobra/Viper, Harrier/Lightning), and fire support planning for contingency response operations. The FIST chief afloat is the fires integration expert the infantry company commander turns to during every MEU planning event. The MEU deployment is the formative operational experience for the FIST chief.
  • Unit Deployment Program (UDP) — Okinawa rotation
    FIST chief under III MEF. Fire support training with allied forces — Japanese, Korean, Australian, Philippine Marines. Different fires architectures, different coordination measures, different CAS platforms. The JFO qualification is particularly valuable in a multinational fires environment. Unaccompanied tour — the marriage math is different.
  • Artillery regiment fires cell or battalion FSC staff
    Some Sgts are assigned to the regiment fires cell or the battalion FSC staff instead of a FIST chief billet. The work is fire support coordination at echelon — staff work, fires planning, coordination measure management across the battalion or regiment. Less infantry-embedded time, more staff experience. The Sgt here learns the fires architecture at a higher level but may miss the FIST chief experience the SSgt board values most.
  • SOI instructor billet (career broadening)
    SOI instructor at SOI East (Camp Geiger) or SOI West (Camp Pendleton) teaching the fire support portion of the Infantry Marine Course. Schoolhouse hours with instructor responsibilities. The instructor billet is visible at the SSgt board and demonstrates the communication and mentoring skills the SNCO track requires.

What Good Looks Like at This Rank

The good Sgt 0861 is the FIST chief the infantry company commander trusts to integrate every fires asset the battalion has — artillery, mortars, CAS, naval gunfire — into the company's scheme of maneuver without killing his own Marines. The company commander does not check the fire support plan before the OPORD because the FIST chief coordinated it with the FSC, deconflicted it with adjacent company FISTs, and built it around the company's scheme of maneuver. The company commander does not worry about fratricide during contact because the FIST chief tracks coordination measures in real time as the company maneuvers and adjusts fires accordingly. His fire support Marines are JFO-qualified or tracking toward it. Each Cpl can call fires independently for one platoon while the FIST chief supports another — correct grid, correct CFF format, correct adjustment, correct coordination measure check. The FIST chief built that capability during garrison weeks when he ran CFF drills, fire support plan exercises, and JFO preparation instead of letting the team idle. The infantry company commander who has two JFO-qualified fire support Marines has a fires capability that most companies do not — and the FIST chief who built it gets the FitRep input that reflects it. The FitReps on his fire support Marines are clean — observed behavior, specific outcomes, no inflation. The reporting senior calls the FIST chief at the end of the rating period to discuss specific Marines because the Section A input describes what each Marine actually did. The battery gunny reads the FIST chief's Section A input and knows which FIST chief writes evaluations that survive the FitRep review. The infantry company commander asks the battalion to keep him for the next deployment. That request is the FIST chief's performance review. The fires were on time, on target, and safe. The fire support plan survived contact because it was coordinated with the FSC and built around the maneuver scheme. The coordination measures were managed in real time. The infantry platoon commanders trust the fire support Marines embedded with their platoons because the FIST chief trained them. In a small MOS, the infantry company commander's request defines the career — and the battalion FSC's FitRep input confirms it.

Preview — The Next Rank

SSgt (E-6) in the 0861 community is the battalion fire support chief — the senior enlisted fire support Marine at the battalion level, managing three to five FISTs embedded with the rifle companies and advising the battalion FSC on fires integration, coordination measures, and fire support planning. The transition from FIST chief to battalion fire support chief is the transition from running fires for one company to managing fires across a battalion. The promotion to SSgt runs through the centralized SNCO selection board under MCO 1400.32. Unlike the cutting-score system for Cpl and Sgt, SNCO advancement is paper-record selection-board based. The board reads your full record — FitReps with relative-value placement, composite scores, PME completion, JFO qualification, awards, education. The differentiator on the SSgt board is the FitRep profile you build at Sgt — FIST chief who builds fire support plans that survive contact, writes clean FitReps the reporting senior defends, and earns the infantry company commander's trust. The SSgt writes three to four Sgt FitReps per cycle on FIST chiefs, briefs the battalion commander on fire support readiness, coordinates with the JTAC on CAS integration, and manages the JFO qualification pipeline for the battalion's fire support Marines. The scope expands from one company to the battalion. The career trajectory from SSgt leads to the GySgt regimental fire support chief billet — and the fires community's read on which SSgts are future fire support chiefs is forming now.
FAQ

0861 E5 — Frequently Asked Questions

Q01What does a E5 0861 (Fire Support Marine) actually do?
You run the FIST (Fire Support Team) — two to four fire support Marines embedded with an infantry company — and you are responsible for their training, their proficiency, and the accuracy of every fire support action the team executes.
Q02What's the most important thing to know as a E5 0861?
The fire support team is yours.
Q03What does a typical day look like for a E5 0861?
Time-blocked day at the E5 0861 rank tier: 0500 Wake. Phone check — infantry company group chat, FIST team group chat. Any overnight changes, any alert status, any issues with fire support Marines or the infantry company. PT uniform on, 0530-0700 PT with the infantry company. You take accountability for your fire support Marines, report to the infantry company formation. You set the pace for the fire support team. The infantry company watches whether the FIST chief can carry the load — and the company commander watches whether the fire support team keeps up with his Marines,…
Q04What mistakes get E5 0861 soldiers fired or relieved?
Phoning the FIST chief role. The infantry company's fires capability is the FIST chief's capability. The infantry company commander reads it at every fire support event; the battalion FSC reads it at every targeting meeting; the SSgt board reads the FitRep that records it; Missing JFO qualification. The FIST chief without JFO cannot integrate joint fires — CAS, naval gunfire, the full spectrum. The infantry company commander deserves a FIST chief who can;…
Q05What career decisions matter most at the E5 0861 rank tier?
Stay 0861 and compete for SSgt battalion fire support chief billet vs. lateral move to another fires MOS — At Sgt, the career trajectory narrows. The 0861 SSgt billet is the battalion fire support chief — the senior enlisted fire support Marine managing three to five FISTs and advising the battalion FSC. The community is small; the billets are specific. The alternative is a lateral move to the gun line (0811) or to the targeting community (0847) — different seats, different daily lives. The 0861 Sgt who loves being forward with the infantry, calling fires,…
Q06What's next after E5 for a 0861 (Fire Support Marine) in the Marines?
SSgt (E-6) in the 0861 community is the battalion fire support chief — the senior enlisted fire support Marine at the battalion level, managing three to five FISTs embedded with the rifle companies and advising the battalion FSC on fires integration, coordination measures, and fire support planning.
Q07What manuals and regulations does a E5 0861 need to know cold?
MCWP 3-16 — Fire Support Coordination in the Ground Combat Element (the primary USMC fire support reference — FIST employment, fire support planning, coordination measures, and the FIST chief's role in the company fight).; JP 3-09 — Joint Fire Support (joint fire support doctrine — JFO procedures, naval gunfire, CAS integration, and joint fires coordination).; JP 3-09.3 — Close Air Support (CAS procedures, Type 1/2/3 control, and the JFO's role — you are the JFO at the company level).

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Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards