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0370O1-O2

Special Operations Officer

O-1 to O-2 (Junior Officer) · Marines

O1–O2O3–O4
HEADS UP

Most of this tier is the pipeline — A&S, then ITC, roughly 13 months. You do not hold the 0370 MOS until ITC is done. A&S is not a fitness test; it is a judgment test with a fitness floor. ITC attrition is real and it runs the entire 13 months, not just the first week. If you arrive at the gaining MSOB as a designated 0370 lieutenant, you have earned the right to begin — not the right to command. The MSOT sergeant major will help you close that gap, if you let him.

The Honest MOS Read
The path to becoming a Marine Special Operations Officer starts at least a year before you ever see Camp Lejeune in the context of MARSOC. You commission, attend The Basic School for six months, attend the Infantry Officer Course for roughly thirteen weeks, and then — if you do not go straight to a rifle platoon in a Fleet Marine Force battalion — you may request a MARSOC Assessment and Selection package from within the fleet. That last clause is load-bearing: MARSOC does not track you down. You apply. The 0370 community has no pipeline slot the Corps holds open for you out of TBS or IOC. You serve in the fleet first, earn the 0302 MOS, and then you raise your hand. A&S at Camp Lejeune runs roughly three weeks. The physical demands are real — multi-day rucking events, load carries, water operations, the sustained aerobic output of someone who has trained for a year-long event rather than a race. But the physical component is the floor, not the ceiling. The assessment cadre evaluates you in team environments where your judgment, communication, and willingness to contribute without being the focal point are visible. The peer assessment is real. Marines who were physically dominant in conventional units and assumed that translated directly to a MARSOC flag are the ones who look confused when they get dropped on day eight without ever failing a physical event. The cadre are watching how you behave when you are exhausted, when you do not know what is coming next, and when a teammate is struggling and you have to choose between your own pace and theirs. MARSOC does not publish official A&S pass rates. The community's culture discourages treating the selection rate as a statistic to reason from. What is public is that attrition is meaningful and that selection is holistic. If you pass A&S, you enter the Individual Training Course — approximately thirteen months at Camp Lejeune. ITC is not a course you graduate by attending. Attrition continues throughout, for cause and for medical reasons. You train alongside enlisted Marine Raider candidates, Special Operations Candidates from other services, and a small cohort of officers. You are not the senior officer. You are a candidate. The instructors are operators who have deployed on real missions and they grade the quality of your mission planning products, your weapons proficiency, your medical skills, your cultural and language engagement, and your small-team leadership behavior against standards the joint SOF community recognizes. A mission analysis product that satisfied your battalion S-3 does not automatically meet the standard the ITC instructor accepts. The gap is real and it is visible inside the first month. The formal training blocks in ITC cover special operations planning (the joint special operations planning process under JP 3-05), direct action lane qualifications, special reconnaissance methods, foreign internal defense framing and engagement planning under JP 3-22, individual survival skills, combatives, language and cultural orientation to the region your gaining MSOB operates in, and the medical skills adjacent to what the Special Operations Combat Medic track requires of enlisted candidates. As an officer your role in the ITC medical lane is not to become the team medic — it is to understand what the team's medics can do, to triage correctly under stress, and to communicate a medical situation to higher command in a format the JSOTF medical element can act on. When ITC is complete and you receive the 0370 MOS designation, you report to a Marine Special Operations Battalion at Camp Lejeune or Camp Pendleton. You will spend time attached to an MSOT in a learning role before you assume primary detachment commander authority. The team sergeant — a Marine Raider Staff Sergeant or Gunnery Sergeant who has more special operations cycles logged than you have years in uniform — will teach you how the team actually works if you are worth teaching. The MSOB company commander will watch you. Your first assignment is to earn credibility, not to exercise it.
Career Arc
  • 01Commission → TBS (6 months, Quantico) → IOC (~13 weeks, Camp Barrett) → Fleet Marine Force as 0302.
  • 02A&S application from within the fleet — package submitted through parent command; selection is competitive and not guaranteed.
  • 03A&S at Camp Lejeune, roughly 3 weeks — selection event with holistic judgment assessment layered on a physical foundation.
  • 04ITC at Camp Lejeune, roughly 13 months — individual and collective special operations training producing the 0370 MOS designation.
  • 05Report to gaining MSOB (Marine Special Operations Battalion) — Camp Lejeune (1st, 2nd MSOB) or Camp Pendleton (3rd MSOB).
  • 06Initial assignment attached to an MSOT in observer/learning role — building credibility before primary DC authority.
  • 07First pre-deployment training cycle as 0370 lieutenant — language, regional familiarization, partner-force orientation, collective MSOT certification events.
Common Screwups
  • ×Treating A&S as a fitness competition and neglecting the small-team judgment and communication performance that the cadre actually scores — MARSOC drops athletic officers with poor team orientation.
  • ×Arriving at ITC with TBS class ranking and IOC performance visible as an identity signal — the ITC instructors do not carry reputations from the conventional side and they grade the product in front of them, not the narrative the candidate brings.
  • ×A DUI or Article 92 violation between IOC and A&S that kills the package — MARSOC packages go through the parent unit CO and require a clean record; a single incident makes the package non-competitive and may end the conventional career simultaneously.
  • ×Missing a language training requirement or treating it as a secondary lane — MARSOC officers without functional language proficiency in the regional language are dependent on interpreters for every partner-force engagement, which is a visible liability to the MSOB commander.
  • ×Failing to build genuine relationships with the team's senior NCOs from day one — the MSOT DC who signals rank authority rather than earned credibility loses the team's trust before the first deployment and it does not come back easily in the MARSOC culture.

A Day in the Life

  • 0430Wake. ITC schedule often starts at 0500 with movement; gaining MSOT schedule varies but expect a 0530-0600 start. Check messages from team or MSOB — overnight planning tasks, admin requirements, or leadership calls.
  • 0500-0630PT — either ITC training circuit (rucking, water operations, combatives, or cardio events depending on the block) or MSOT PT with the team. As DC the expectation is to lead from the front; the team watches the DC in every fitness event.
  • 0630-0800Hygiene, chow, uniform change. During ITC: morning academics or language lab. During MSOT pre-deployment: coordination with team sergeant on the day's training plan and any MSOB taskings.
  • 0800-1000Primary training block. ITC: mission planning academics, weapons qualification lanes, medical skills training, combatives, or a land navigation event depending on the block. MSOT: collective training event, partner-force engagement planning, or an external training package with a joint SOF element.
  • 1000-1200Graded events or continued training. ITC: the TMB product is often due during this window after a planning isolation period. MSOT: equipment maintenance, T&R task certification documentation, or MSOB coordination.
  • 1200-1300Chow — usually at the chow hall or field-expedient if in a training environment. ITC candidates eat together; MSOT members eat as a team during collective training events.
  • 1300-1500Afternoon primary training. ITC: FID engagement planning lane, cultural and language training, survival skills, or a rehearsal walk-through for a graded event. MSOT: collective rehearsal for an upcoming certification event, property accountability review, or FitRep drafting if in a garrison window.
  • 1500-1700Debrief, AAR, or continued lane work. ITC: instructor debrief on the morning's graded product — the debrief is where the learning happens and where for-cause observations accumulate. MSOT: MSOB coordination meeting, company commander brief prep, or team administrative requirements.
  • 1700-1900Personal time — food, gear maintenance, personal equipment prep for tomorrow's training. ITC: study for the next academic block; research the planning problem for tomorrow's graded TMB. MSOT: catch up on FitRep drafts, T&R documentation, or language study.
  • 1900-2100Study or planning. ITC: JP 3-05, MCTP 3-10B, NAVMC 3500.44 — the references the instructors grade against. MSOT officers in garrison: pre-deployment training plan development, MSOB coordination products, language or regional studies.
  • 2100-2200Admin, gear prep, sleep prep. ITC: equipment laid out for 0500 movement, charge all communications equipment, review the next day's schedule. The ITC candidate who is not asleep by 2200 is the candidate who will miss a step in the next day's land navigation event.
  • Field / extended training rotationsThe clock is compressed. ITC field phases can run multiple consecutive days without full recovery. MSOT collective training packages run 2-3 week external blocks. The operational schedule is the instructor's or the MSOB's — the DC executes the schedule, not the other way around.

Weekly Cadence

During ITC the week has no civilian-recognizable rhythm. The training calendar is set by the ITC cadre and it sequences academic blocks, individual qualification lanes, and collective events in a cycle calibrated to compress cognitive and physical performance simultaneously. The officer who tries to predict which days are heavy and which days are light is the officer who misjudges the recovery investment and shows up to a multi-day field problem under-prepared. The cadence is: execute the scheduled event, debrief honestly, prepare for the next event, sleep. At the gaining MSOT in a pre-deployment training cycle, the weekly rhythm is driven by the MSOB S-3's training schedule. Monday is typically the BN-level coordination day — the company commander meets with DC cohort to align priorities, the S-3 pushes the week's training schedule adjustments, and the team sergeant runs the internal team coordination. Tuesday and Wednesday are primary collective training days — partner-force engagement scenarios, weapons qualification maintenance, collective rehearsals, or external training packages with joint enablers. Thursday is often maintenance, property accountability, T&R documentation, or a language block. Friday has a BN-level event or release, depending on the deployment phase. The weight of the week shifts dramatically based on where the MSOT is in the PDC cycle. Six months out from deployment, the week feels like an advanced infantry course with better equipment. Three months out, the collective training events are the graded events that feed the PDC evaluation. The week before the PDC itself is a full isolation-to-rehearsal cycle, and the DC is managing the team's task completion alongside the MSOB's coordination requirements simultaneously. The officer who has maintained the T&R calendar, tracked the equipment accountability, and built the partner-force assessment during the six months before PDC arrives at that week without a fire to fight. The one who deferred the administrative work is making calls at 2200 trying to resolve discrepancies the evaluation team will find in the morning.

Key Skills — How to Drill Each

  1. 01
    Apply the joint special operations planning process (JOPP) per JP 3-05 to produce a Tactical Mission Briefing that the MSOB commander and JSOTF staff can approve and execute — mission analysis, course-of-action development, war-gaming, and a decision brief that names the risks honestly.
    Do not wait for ITC to make JP 3-05 part of your permanent knowledge base — read it before you submit your A&S package and annotate the chapters on special operations activities and the mission approval process. The gap between how an OPORD was briefed in your battalion's S-3 and how a MSOT TMB is structured and evaluated will be visible in your first ITC graded product. The ITC instructors grade the quality of the mission analysis, the specificity of the threat assessment, and the coherence of the course-of-action comparison — not the slide format. Officers who treat the TMB as a brief fall short; officers who treat it as a planning product that a team of 14 will execute on an objective execute it correctly.
  2. 02
    Conduct a Foreign Internal Defense assessment and initial engagement plan — evaluate a partner force's training needs, build a MSOT training program against JP 3-22, and report the outcomes in a format the Theater Special Operations Command reads.
    FID is the MSOT mission set that the officer owns more than any other. The enlisted team members are the trainers; you are the relationship manager, the assessment writer, and the accountability holder for whether the program achieves the combatant command's security cooperation objective. Read JP 3-22 before the FID blocks of ITC and annotate the section on the advise, train, assist, and accompany mission sequence. In the ITC FID lane, your graded product is the written assessment of the notional partner force — treat it as the document a TSOC J-2 will read, not a lane exercise deliverable. The officer who cannot write a coherent FID assessment is the officer who burns the first three months of deployment figuring out what he should have known before he got on the plane.
  3. 03
    Lead a 14-person MSOT as the detachment commander — planning cycle, task organization, CASEVAC plan, equipment accountability, and mission rehearsal — with the team sergeant as the experienced technical advisor, not the backup decision-maker.
    The MSOT leadership relationship is not a conventional chain of command. The team sergeant has operational experience you do not have, and the team reads whether you understand that or not. The model that works: you own the planning products and the command authority with the MSOB; the team sergeant owns the execution knowledge and the team's internal technical standards. Brief the team sergeant on your planning intent before you brief the team — he will catch the gaps in the plan before the rehearsal surfaces them in front of the company commander. The DC who goes around the team sergeant loses both the team sergeant and the team's confidence inside the first week of the pre-deployment training cycle.
  4. 04
    Operate across the individual weapons, communications, and medical skills lanes that ITC requires — not at team-medic or 18-series specialist depth, but at the level where you understand the team's capability and can lead it under austere conditions.
    Own the weapons qualification standard cold. The DC who struggles through ITC's weapons qualification lanes while the enlisted candidates post strong scores loses quiet credibility with the team before the first deployment. For the medical skills: focus on the CASEVAC scenario decision tree — when to call for MEDEVAC, how to communicate a 9-line under communications constraints, and the first 60 minutes of care under the officer's supervision. For communications: know the team's communication plan, how to work the alternate and contingency nodes, and what the comm-out execution standard is. You are not the radio operator or the 18E; you are the officer who does not go comm-out on the first real operation because he never invested time in the ITC comm lanes.
  5. 05
    Manage MSOT property accountability — SOF-specific equipment, non-standard weapons, communications systems, specialized vehicles — through the pre-deployment accountability process and on the forward operating base without a garrison support structure.
    The SOF supply chain is long and the MSOT's non-standard equipment has serial numbers that the MSOB property book officer tracks across rotations. A missing serial number at the FWTS accountability inspection is a DC-level failure that the MSOB commander notes in the FitRep. Get the property book squared in the first 30 days of the MSOT billet — walk every piece of equipment with the team's senior logistics element, reconcile serial numbers before you sign, and know which items have the longest replacement lead times so you are never explaining why the team cannot execute because the communications gear is lost in the supply chain.

Manuals & References — What Chapters Matter

  • JP 3-05 — Special Operations.
    The authoritative joint doctrine for the full range of special operations activities: direct action, special reconnaissance, foreign internal defense, unconventional warfare, and the SOCOM command-and-control relationships that the MSOT operates within. Chapter 3 on special operations activities is the document ITC instructors quote back to you in the graded mission planning products, and the TMB format the JSOTF accepts is derived from this joint doctrine. Read it before A&S; annotate it before ITC; use it as the backbone of every planning product you write as a DC.
  • MCTP 3-10B — Marine Special Operations.
    MARSOC tactical doctrine governing the MSOT organizational concept, the six-element team structure, and the MSOT mission planning and execution framework. The DC who reads MCTP 3-10B as preparation — not as a reference to look things up in — is the DC whose team reads as operationally credible in the MSOB commander's assessment. The sections on team organization and the mission command relationship between the DC and the MSOB are the parts to own cold.
  • JP 3-22 — Foreign Internal Defense.
    The joint doctrine governing the FID mission set — the legal authorities for the train-advise-assist sequence, the phase model for a FID program, the reporting requirements to the Theater Special Operations Command, and the assessment methodology the DC uses to evaluate a partner force's capability and training readiness. The MSOT officer who cannot brief the FID phases from memory and explain the difference between train and advise to the TSOC J-5 is the officer who struggles in the FID-heavy MSOB deployment cycles.
  • NAVMC 3500.44 — MARSOC Training and Readiness Manual.
    The individual and collective training standards that ITC trains you to and the MSOT is evaluated against throughout the pre-deployment training cycle. The DC owns the unit-level T&R tracking — knowing which tasks are expired, which individual qualifications are pending, and what the certification timeline looks like going into the pre-deployment certification event. A team that arrives at PDC with expired T&R tasks is a team the DC failed to manage; the MSOB S-3 reads the certification result and the DC's FitRep reflects it.
  • MCDP 1 — Warfighting; MCDP 1-3 — Tactics.
    The Marine Corps's foundational doctrine. MARSOC assumes you own both before A&S — they are the TBS and IOC doctrinal foundation. The ITC instructors do not re-teach them; they grade whether your mission planning products reflect the doctrinal principles. The DC who surfaces disciplined mission analysis and clear intent-driven planning in the TMB reflects MCDP 1-3's principles in execution. Re-read both before A&S to reconnect the doctrinal language with the operational problems you are about to face.

Standards — How to Hit Each

  • IOC graduate (Infantry Officer Course, ~13 weeks, Camp Barrett, Quantico) — non-waiverable prerequisite for an A&S package submission.
    IOC is a prerequisite, not an advantage. MARSOC does not differentiate meaningfully between top-of-IOC graduates and mid-range graduates when reading A&S performance — but it does screen out officers who did not graduate at all. Arrive at IOC prepared to perform at the top of the physical and tactical lanes; the habits of preparation you build at IOC are the same habits A&S will test under higher stress and longer duration.
  • A&S completion at Camp Lejeune — the selection event that determines whether the Corps invests 13 months of ITC training in this officer.
    The physical preparation bar is 12-month minimum of sustained work: loaded rucking 3-4 times per week at extended distances, swimming with gear, and the aerobic base for multi-day events without full recovery between them. The behavioral preparation is harder to manufacture: practice making decisions under exhaustion, in small teams, where your individual performance matters less than your contribution to the group's outcome. Officers who trained for A&S as if it were an individual athletic competition are the officers who look confused when the performance that counts is the one the cadre saw on day eleven at 0300 during a team land navigation problem.
  • ITC completion — roughly 13 months of individual and collective SOF training producing the 0370 MOS designation.
    ITC attrition continues throughout — medical, for-cause, and voluntary drops. The officers who complete ITC stay on the right side of the attrition line by treating every graded product as a mission product rather than a school assignment: the mission analysis is researched and honest, the weapons qualification is trained between events not only during them, the medical skills are practiced until the performance under stress is reflexive. The ITC instructor who sees an officer treating a graded planning product as a box to check is the instructor who begins writing the for-cause drop recommendation.
  • Language proficiency qualification at the DLPT level MARSOC assigns for the gaining MSOB's regional focus.
    Language training is often concurrent with or immediately following ITC — Defense Language Institute or a MARSOC-assigned intensive course. The practical standard is not a test score: it is whether you can conduct a sustained conversation with a partner force counterpart in a professional context without interpreter mediation. Officers who treat language as a DLPT score to clear and then let decay become the DCs who spend the first three months of deployment dependent on the team's interpreter for every partner-force meeting, which is a visible capability gap to the MSOB commander and the partner-force counterpart.
  • Physical fitness at the sustained top-tier SOF standard — the team watches the DC in every MSOT fitness event and every austere-environment physical task.
    The DC does not need to be the fastest Marine on the team — but he cannot be the performance anchor in the rucking events, the water operations, or the long-duration fitness assessments. The team reads the DC's physical standard as a proxy for operational commitment. Train loaded rucking and water operations throughout the year, not as a preparation spike before assessments. The DC who coasted on pipeline momentum and stopped investing in the physical standard after ITC is the DC whose team sergeant quietly adjusts the mission plan to accommodate the DC's limitations — and that adjustment is visible.

Technical Mistakes — Concrete Consequences

  • Treating A&S as a physical fitness competition and underinvesting in the small-team judgment and communication performance the cadre actually scores.
    Officers dropped from A&S for non-physical reasons frequently describe the same arc: strong individual physical performance, poor team orientation in multi-day events, an inability to subordinate individual pace to collective outcome. The cadre drops this officer mid-assessment and the parent command receives a brief explanation. The officer can reapply after a waiting period, but the reapplication record is visible and the window to ITC may not survive a second selection cycle given the officer's career timeline.
  • Submitting a mission analysis product in the ITC planning lane that meets a battalion S-3 standard but does not meet the joint SOF planning standard.
    The ITC instructor's grade on the planning product is a for-cause drop risk if the gap is large enough. The more common outcome is a low-grade written product that follows the officer into the PDC evaluation cycle and shapes the MSOB company commander's read of the DC's mission planning maturity before the first deployment. A DC who cannot produce a credible TMB forces the MSOB S-3 to edit the product before it goes to the JSOTF, which is a commander-level failure with a FitRep consequence.
  • Arriving at the gaining MSOT and signaling rank-based authority rather than earned credibility in the first 30 days.
    The MSOT team sergeant and the team's senior NCOs read the new DC carefully in the first month. A DC who mistakes grade for credibility — who corrects the team sergeant publicly, who makes decisions without consulting experienced team members, who treats the conventional chain of command dynamics as the operating model — loses the team's functional trust before the first deployment. The MSOT operates on the DC's command authority and the team's collective competence; a DC the team does not trust forces the MSOB to manage the team around the DC, which the MSOB company commander notes in the command FitRep.
  • Missing a NAVMC 3500.44 T&R task certification before the pre-deployment certification event without reporting it to the MSOB S-3.
    A team that arrives at PDC with expired or incomplete T&R tasks does not deploy until the task is re-certified, which delays the deployment timeline and directs the MSOB commander's attention to the DC's T&R management failure. The consequence is not just the PDC delay — it is the FitRep narrative that the MSOB company commander writes describing how the team showed up to a command-level evaluation event with incomplete certifications, which is a visible command failure in a small community where command FitReps are read by name.
  • Letting property accountability on SOF-specific equipment slip before the FWTS accountability inspection.
    A missing serial number on a non-standard weapon, a specialized communications system, or a breaching asset at the FWTS accountability inspection is a DC-level failure. The replacement lead time for SOF-specific equipment is measured in months; the gap in the team's equipment capability is a deployment readiness issue the MSOB commander is now managing. The DC who signed for the property and cannot reconcile the serial number at the inspection is the DC who owns the investigation and the FitRep consequence simultaneously.

Career Decisions at This Rank

  • Fleet time before A&S — how long to serve as a 0302 before submitting the MARSOC package.
    The Marine Corps does not specify a minimum fleet time window before A&S eligibility, but the community's experience strongly suggests that 18-24 months as a rifle platoon commander makes an officer a better A&S candidate than an IOC graduate with 6 months in the fleet. The practical argument: platoon commander time builds the small-unit leadership credibility and physical conditioning baseline that A&S tests, and the officer with two MEU PTP events and a deployment in his record has a different understanding of sustained physical and operational stress than the officer who went straight from IOC to the application window. The cost: the later you enter MARSOC, the more compressed your officer career arc becomes. A 0302 who delays until 36 months fleet time is a more experienced A&S candidate and a less competitive Capt board candidate if ITC consumes the remaining pre-board window. There is no universally correct answer; the honest variable is whether you are ready to actually compete at A&S or whether you are submitting an early package to find out.
  • Voluntary drop during ITC — when is the physical or medical calculation honest versus when is it giving up.
    ITC is 13 months. Medical drops are real; the physical demands accumulate and overuse injuries in the feet, knees, and shoulders are common by month five of rucking-intensive training. The calculation is different depending on the cause: a stress fracture that will get worse is not the same decision as muscle soreness from a hard week. The community expects officers to know the difference. Voluntary drops for non-medical reasons carry a stigma in MARSOC culture that a medical drop does not. The officer who drops voluntarily for non-medical reasons can reapply, but the timing may not fit the career window and the reapplication record is visible. The officer who pushes through an injury that ends his running career is making a different mistake. Talk to the ITC medical staff; do not make a permanent decision from a temporary pain state.
  • First MSOT assignment — accepting the gaining MSOB billet versus attempting to influence assignment to a specific battalion.
    MARSOC assignment to a specific MSOB is managed through the Group monitor, not through personal preference. The 1st, 2nd, and 3rd MSOBs are at Camp Lejeune and Camp Pendleton; the operational focus areas differ. The honest advice: take the first MSOT billet offered, regardless of location preference, and build the DC tour that the MARSOC community reads as competitive. An officer who delays accepting assignment or attempts to negotiate the specific MSOB billet risks signaling community-culture misalignment in a small organization where the monitor and the Group CG know each other by name.

How the Seat Varies by Unit Type

  • ITC candidate cohort at Camp Lejeune
    ITC runs a mixed cohort — Marine Raider candidates (enlisted and officer), Special Operations Candidates from other services, and a small officer group. The dynamics of being one of three to six Marine officers in a cohort of forty-plus candidates creates a specific social environment: you are visible as an officer in every graded event, the enlisted candidates read your performance standards as a proxy for officer credibility in the SOF community, and your small-team dynamics with the fellow officer candidates set the template for how you will work with MSOT element leaders for the rest of your career.
  • Camp Lejeune MSOB (1st or 2nd MSOB — East Coast deployment focus)
    The East Coast MSOBs deploy primarily into AFRICOM and EUCOM theater rotations, with CENTCOM cycles depending on COCOM requirement. Partner-force profiles in AFRICOM-focused deployments emphasize FID and security cooperation programs with African partner militaries. Language training for East Coast MSOT DCs skews toward French (Francophone Africa) and Arabic depending on the MSOB's current COCOM alignment. The MEU-SOC relationship is structurally tighter on the East Coast given the 2nd MARDIV and East Coast ARG presence.
  • Camp Pendleton MSOB (3rd MSOB — Pacific/INDOPACOM deployment focus)
    The 3rd MSOB supports INDOPACOM and occasionally CENTCOM requirements. Partner-force profiles include Southeast Asian military forces, with different language requirements (Tagalog, Indonesian, Thai) depending on COCOM alignment. The Pacific deployment cycle has a different transit footprint and partner-nation relationship architecture than the Atlantic/AFRICOM/CENTCOM cycle. MSOT DCs at 3rd MSOB operate with more geographic and cultural variation across rotations than their East Coast counterparts in a given 24-month command window.

What Good Looks Like at This Rank

The good 0370 lieutenant in the pipeline is the officer the ITC instructor describes as 'would take on a mission.' The planning products are thorough and honest — the threat assessment names the real threat, the course-of-action comparison names the real risk, and the decision brief does not hide the uncertainty the team will face on the objective. The weapons qualification performance is at the top of the officer cohort. The FID assessment written in the ITC lane reads like a document a TSOC J-2 would accept, not a school exercise. At the gaining MSOB, this lieutenant spends the first 90 days asking the team sergeant more questions than he asks the MSOB company commander. He knows his team's T&R status cold, he has walked every piece of equipment with the serial number, and he has read the previous MSOT's deployment after-action report before his first pre-deployment training event. The team sergeant briefs the MSOB sergeant major that the new DC listens before he decides, plans honestly, and runs the morning PT event at the front of the formation. By the end of the first pre-deployment training cycle, the team sergeant is recommending to the company commander that this DC should carry primary authority on the first mission. That recommendation, in writing or verbally, is the credibility certificate the MARSOC community reads. The officer on the path to a strong MSOT command tour and a competitive Capt-to-Maj board is not the fastest runner from ITC — he is the DC who built a team the MSOB company commander trusts, produced planning products the JSOTF staff approved without a rework requirement, and managed the pre-deployment training cycle without a single T&R certification gap at the PDC evaluation. The FitRep that follows a command tour like that is the document the MARSOC Major board reads first.

Preview — The Next Rank

Capt / O3-O4 in MARSOC is detachment commander — 14 Marines and sailors, command authority under the MSOB, and the mission planning and execution responsibility that the 0370 community is actually organized around. The pipeline tier (o1-o2) is the qualification and credibility-building window; the command tier (o3-o4) is where the 0370 MOS is actually exercised in its primary form. The leap from o1-o2 to o3-o4 is not a promotion event — it is a function of time in the MSOT billet and the MSOB company commander's read of whether the lieutenant is ready to carry primary DC authority without supervision. The command FitRep from the MSOB company commander is the document the MARSOC Major board reads with the same intensity the conventional infantry community reads the rifle company command FitRep. In a small community where the MARSOC CG knows the DC cohort by name, the MSOT command tour's reputation travels ahead of the FitRep. The DC whose team has a clean PDC record and a strong JSOTF working relationship is the officer whose name the Group staff surfaces to the monitor before the Major board convenes. The operational environment shifts after the first MSOT command tour. Post-DC, the MARSOC major moves to the MSOB or MSOR Group staff — S-3, fires officer, joint planning billet — where the operational credibility built on the team translates into the planning products that commit the regiment's teams. The major who spent the DC tour producing credible mission products and managing a functional partner-force relationship has the raw material to be a strong staff officer. The one who coasted through the command tour arrives at the staff assignment without the operational credibility the staff billets require to be credible to the teams.
FAQ

0370 O1-O2 — Frequently Asked Questions

Q01What does a O1-O2 0370 (Special Operations Officer) actually do?
You commission through OCS, NROTC, or the Naval Academy, spend six months at The Basic School, and then attend the Infantry Officer Course at Quantico before MARSOC will even consider your package.
Q02What's the most important thing to know as a O1-O2 0370?
Most of this tier is the pipeline — A&S, then ITC, roughly 13 months.
Q03What does a typical day look like for a O1-O2 0370?
Time-blocked day at the O1-O2 0370 rank tier: 0430 Wake. ITC schedule often starts at 0500 with movement; gaining MSOT schedule varies but expect a 0530-0600 start. Check messages from team or MSOB — overnight planning tasks, admin requirements, or leadership calls, 0500-0630 PT — either ITC training circuit (rucking, water operations, combatives, or cardio events depending on the block) or MSOT PT with the team. As DC the expectation is to lead from the front; the team watches the DC in every fitness event, 0630-0800 Hygiene, chow, uniform change.…
Q04What mistakes get O1-O2 0370 soldiers fired or relieved?
Treating A&S as a fitness competition and neglecting the small-team judgment and communication performance that the cadre actually scores — MARSOC drops athletic officers with poor team orientation; Arriving at ITC with TBS class ranking and IOC performance visible as an identity signal — the ITC instructors do not carry reputations from the conventional side and they grade the product in front of them, not the narrative the candidate brings;…
Q05What career decisions matter most at the O1-O2 0370 rank tier?
Fleet time before A&S — how long to serve as a 0302 before submitting the MARSOC package — The Marine Corps does not specify a minimum fleet time window before A&S eligibility, but the community's experience strongly suggests that 18-24 months as a rifle platoon commander makes an officer a better A&S candidate than an IOC graduate with 6 months in the fleet. The practical argument: platoon commander time builds the small-unit leadership credibility and physical conditioning baseline that A&S tests,…
Q06What's next after O1-O2 for a 0370 (Special Operations Officer) in the Marines?
Capt / O3-O4 in MARSOC is detachment commander — 14 Marines and sailors, command authority under the MSOB, and the mission planning and execution responsibility that the 0370 community is actually organized around.
Q07What manuals and regulations does a O1-O2 0370 need to know cold?
MCDP 1 — Warfighting; MCDP 1-3 — Tactics (the conceptual foundation TBS and IOC build before A&S; MARSOC assumes you own it).; JP 3-05 — Special Operations (the joint doctrine governing MARSOC missions; read this before A&S — the MSOT planning process lives here).; NAVMC 3500.44 — Marine Special Operations Command T&R Manual (the individual and collective training standard that ITC trains you to and the MSOT evaluates you against).

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