2141 Amphibious Combat Vehicle Repairer/Technician

The Marine Corps has fewer than two hundred 2141s across the entire active force at any given time. Every assault amphibian battalion depends on them. When an Amphibious Combat Vehicle breaks down on a beach, in a motor pool, or on a ship during a float, you are the Marine who gets it back up. The work is technically exacting, physically demanding, and directly tied to the battalion’s ability to execute its mission. If you want a job where what you do in the maintenance bay today determines whether the rifle company can move tomorrow, this is it.

Job Role and Responsibilities

MOS 2141 Marines inspect, diagnose, maintain, and repair Amphibious Combat Vehicles and legacy Assault Amphibious Vehicles at field and intermediate maintenance levels. They perform scheduled and unscheduled maintenance, troubleshoot hydraulic, electrical, and powertrain faults, and conduct recovery operations for disabled vehicles. These Marines keep the ACV and AAV fleet mission-capable so assault amphibian units can execute ship-to-shore and land combat operations.

Day-to-Day Work

A typical day splits between scheduled preventive maintenance and reactive repairs. Before operations, you run Pre-Combat Checks and Inspections on assigned vehicles. After operations, you conduct After Operations maintenance, scanning for oil leaks, track wear, ramp seal condition, and anything that could fail before the next training event.

You replace an ACV track section, bleed the hydraulic lines, and certify the vehicle water-ready before the battalion’s next amphibious exercise. That sequence is not unusual. It happens on a Wednesday. When a vehicle throws a fault code, you pull the diagnostic history from the electronic control modules, isolate the fault to the component level using technical manuals, and either order parts or begin the repair. Speed matters, but accuracy matters more: a missed fault during a water operation becomes a safety emergency.

Common daily tasks include:

• Oil and filter changes, fluid sampling, and coolant system maintenance on the ACV’s Cummins diesel engine
• Track adjustment, road wheel inspection, and suspension component replacement
• Hydraulic ramp and bow flap system checks, seal replacement, and pressure testing
• Electrical fault isolation using diagnostic software and multimeters
• Recovery rigging setup using the ACV Recovery variant’s crane and tow systems
• Updating maintenance records in the Global Combat Support System-Marine Corps (GCSS-MC)

Specialized Roles and MOS Codes

Platform and Equipment

The primary platform today is the ACV-1.1, a wheeled amphibious vehicle manufactured by BAE Systems. It replaces the legacy AAV-P7/A1, which many units still operate through the transition period. The ACV carries 13 Marines at combat load and is designed for ship-to-shore and inland maneuver.

You also work on the ACV-R (Recovery) variant, which carries a crane, towing capability, and on-site repair tooling. Standard shop equipment includes hydraulic floor jacks, vehicle-specific shop sets, technical manual libraries, and GCSS-MC. In the field, the shop is a cammie net and whatever tools fit on the recovery vehicle.

Mission Impact

An assault amphibian battalion’s operational capacity is a direct function of vehicle readiness. A company that deploys with 60% of its vehicles available executes fewer missions, covers less terrain, and supports fewer attached infantry. You own that readiness number. Your work does not stop at the end of the duty day when the unit has a training event or deployment in the morning.

Salary and Benefits

2026 Base Pay

Pay is determined by grade and years of service. New Marines enter at E-1 (Private) and typically make Corporal within two to three years with sustained performance.

Pay figures from DFAS 2026 active-duty pay tables, effective January 1, 2026.

Allowances and Special Pay

Beyond base pay, Marines receive two standard non-taxable allowances.

Basic Allowance for Subsistence (BAS) is $476.95 per month in 2026 for all enlisted Marines regardless of duty station. This is a food allowance; it does not vary by location or family status.

Basic Allowance for Housing (BAH) is separate and substantially larger. It varies by duty station, pay grade, and whether you have dependents. A single E-4 at Camp Lejeune receives a different rate than one at Camp Pendleton. For current figures at your duty station, use the DoD BAH calculator.

Benefits

Healthcare is covered at no cost under TRICARE Prime for active-duty Marines. Enrollment, deductibles, and copays are all $0. Family members enroll under the same plan with no enrollment fee and no in-network copays. An annual catastrophic cap limits out-of-pocket exposure for the family.

Retirement falls under the Blended Retirement System (BRS): a pension paying 40% of your high-36 average base pay at 20 years, plus a Thrift Savings Plan with up to 5% government matching. Marines in the 8-to-12-year window may qualify for Continuation Pay, a one-time cash bonus in exchange for an additional service commitment.

Tuition Assistance covers up to $4,500 per year and $250 per semester hour for off-duty college courses. The Post-9/11 GI Bill kicks in after separation, covering full in-state tuition at public schools or up to $29,920.95 per academic year at private institutions (AY 2025-2026 cap).

Leave and Work-Life Balance

Marines earn 30 days of paid leave per year, accruing 2.5 days per month with a 60-day carryover cap. Vehicle maintenance is shift-based in garrison, but fleet requirements and deployment tempo routinely push those shifts longer. Expect irregular hours when the unit is preparing for exercises or a MEU workup.

Qualifications and Eligibility

Requirements Table

The MM composite is calculated as AR + MC + AS + EI: Arithmetic Reasoning, Mechanical Comprehension, Auto and Shop Information, and Electronics Information. All four subtests contribute directly to your score, so focused preparation pays off. Start with ASVAB study resources to identify which subtests need the most work before your MEPS date.

Enlistment Process

1. Meet with a Marine recruiter and complete pre-screening paperwork
2. Take the ASVAB or PiCAT at a Military Entrance Processing Station (MEPS)
3. Pass the MEPS physical examination
4. Select MOS 2141 during the classification process if your MM score qualifies and the MOS is open
5. Sign your enlistment contract and ship date

The process from initial recruiter contact to ship date typically runs two to six months. MOS 2141 is a small community with limited annual seats, so open slots fill quickly. If you have the score and want the MOS, move on it.

Selectivity and Waivers

The MM 105 minimum is firm for initial accession. The line score is not waivable. If you miss it, you retake the ASVAB after focused preparation. Waivers exist for some minor medical conditions and certain conduct issues, but those are evaluated case by case through the recruiting chain.

Service Obligation

Most enlisted contracts in the ground ordnance maintenance field carry a four-year active-duty obligation. You enter at E-1 (Private) unless you have qualifying college credits or JROTC service, which can advance you to E-2 or E-3 at entry.

Work Environment

Setting and Schedule

Your primary workspace is a vehicle maintenance bay. In garrison at Camp Pendleton or Camp Lejeune, that means a covered shop with lifts, tool control boards, and parts management systems. In the field, it means working under a cammie net on a vehicle that just came off the water or a convoy route, with whatever light is available and whatever tools are on the recovery vehicle.

Maintenance units work Monday through Friday in garrison, with Saturday maintenance days common before large exercises or deployments. When the unit is on a training exercise or MEU deployment, the schedule is driven by operational requirements, not the calendar.

Chain of Command and Communication

Junior 2141s at E-1 through E-4 work under a shop NCOIC who is typically a Sergeant or Staff Sergeant. Performance feedback runs through daily supervision and formal semi-annual proficiency and conduct marks at the E-1 through E-6 level. SNCOs receive Fitness Reports (FITREPs) that assess leadership, professional knowledge, fitness, and duty performance.

Communication in a maintenance shop is blunt and direct. When a vehicle has a fault, the NCOIC needs to know immediately, not at the end of the workday. Marines who surface problems early build a reputation for reliability. Marines who hide problems until they become emergencies do not last long in a small community.

Team Dynamics and Autonomy

Maintenance shops run on a small-team model. Three to five Marines often work the same vehicle, which means clear task assignment matters as much as technical skill. A junior Marine who takes initiative on their assigned vehicle and communicates proactively builds a reputation fast.

Most decisions at the junior level are directed rather than autonomous. You work from technical manuals and shop orders. As experience builds, senior 2141s troubleshoot independently and mentor junior Marines through diagnostic sequences. By the time you reach Sergeant, you are the one setting task priorities for the section.

Retention and Satisfaction

Ground ordnance maintenance tends to attract Marines who genuinely like working on mechanical systems. Marines who stay in cite the technical depth, hands-on nature of the work, and the tight-knit shop culture. Those who separate early often cite the pace of garrison maintenance requirements and the limited duty station options tied to a narrowly specialized platform.

Training and Skill Development

Training Pipeline

Total pipeline from Boot Camp entry to fleet assignment runs roughly eight to nine months for most 2141 Marines.

MOS School Details

The Assault Amphibian School Battalion at Camp Del Mar, Camp Pendleton is the only location for 2141 training. The Basic Repairer Course is lab-heavy. Most instruction happens on actual vehicle components, not in a classroom. Topics include:

• ACV and AAV powertrain systems: engine, transmission, transfer case
• Suspension, track, and road wheel maintenance
• Hydraulic systems: ramp, bow flap, bilge pump, trim vane
• Electrical systems and fault isolation procedures
• Recovery operations using the ACV-R
• Technical manual use and GCSS-MC maintenance data entry

Marines who arrive with mechanical experience (automotive, heavy equipment, or farm machinery) move faster through the technical portions. The course is not academic; if you learn by doing, it suits you well.

Advanced Training

After two to three years in the fleet, experienced 2141s are candidates for the Assault Amphibious Vehicle Repair Intermediate Course at Camp Del Mar. This course runs approximately 63 training days and prepares NCOs for more complex diagnostics and supervision of junior repairers.

Other opportunities include:

• Quality Assurance Representative (QAR) course, which qualifies a Marine to inspect and certify maintenance quality across the shop
• Maintenance Management course with a GCSS-MC focus for Marines moving into logistics billets
• Manufacturer-sponsored technical training on ACV systems through BAE Systems field service programs
• Civilian credentials through the Marine Corps COOL program aligned to ASE certifications and heavy equipment trades

The COOL program can cover exam fees for ASE certifications you earn during service. That credential stays with you after separation and has direct dollar value on the civilian job market.

Career Progression and Advancement

Rank Progression

Promotion to E-4 through E-6 is driven by composite score: cutting scores, fitness scores, rifle qualification, and billet performance combined. Promotion to E-7 and above is by selection board. A competitive 2141 Sergeant builds a record that shows both technical mastery and the ability to lead junior Marines through complex maintenance.

Lateral Moves and Transfers

The LATMOVE program allows Marines to request an MOS change, subject to Marine Corps needs and billet availability. A 2141 with several years of fleet experience might lateral to 3521 (Automotive Maintenance Technician) or toward a maintenance management MOS. Lateral moves are competitive and timing-dependent. They require command endorsement and an available seat.

Performance Evaluation

E-1 through E-6 Marines receive semi-annual proficiency and conduct marks from their commanding officer. Staff Noncommissioned Officers at E-7 and above receive Fitness Reports (FITREPs) evaluated against peers of the same grade. The FITREP covers leadership, professional knowledge, physical fitness, and duty performance. In a small MOS community, every reporting senior you have will know your work personally.

Warrant Officer and LDO Path

Experienced 2141 Marines with sufficient time in MOS and chain-of-command recommendation may apply for the Limited Duty Officer or Warrant Officer programs in the ordnance maintenance community. Both paths are competitive and require a strong technical and leadership record. For Marines who want to keep doing the technical work without moving into purely administrative roles, the warrant path is worth exploring early in the mid-career window.

Physical Demands and Medical Evaluations

Daily Physical Requirements

ACV maintenance is hard on the body. You regularly crawl under 37-ton vehicles in full PPE, lift track components that weigh 50 to 100 pounds, and work in environments saturated with grease, hydraulic fluid, and diesel exhaust. Extended shifts on concrete floors or in field conditions add up over years.

Specific daily demands include:

• Lifting and carrying components up to 50 lbs unassisted, heavier with a team lift
• Working in cramped engine compartments and under vehicle hulls
• Standing on hard surfaces for extended periods: concrete in garrison, uneven ground in the field
• Outdoor field maintenance in all weather at Camp Lejeune (hot summers, cold winters, frequent rain) and Camp Pendleton (heat, dust, coastal conditions)
• Operating recovery equipment and rigging under tension

Water operations add another layer. ACV units conduct amphibious training regularly, and maintenance checks before and after water ops involve inspecting hull seals, bilge pumps, and ramp systems, often in wet conditions at the waterline.

PFT and CFT Standards

All Marines, regardless of MOS, must pass the Physical Fitness Test (PFT) and the Combat Fitness Test (CFT). Both are scored 0 to 300, with first class at 235 or above.

Both tests are administered twice per year. Minimum passing scores vary by age and gender. Current standards are published at marines.mil. The 2141 MOS does not set fitness standards above the Marine Corps baseline, but a maintenance Marine who is physically weak will struggle with the job regardless of what the test says.

Medical Standards

Marines meet initial MEPS medical accession standards and maintain periodic medical readiness throughout service. No special medical requirements apply specifically to MOS 2141 beyond the Marine Corps baseline. Hearing protection is mandatory in maintenance environments and during vehicle operations. Marines with documented hearing loss may face billet limitations over time.

Deployment and Duty Stations

Deployment Patterns

MOS 2141 Marines deploy with assault amphibian units and Marine Expeditionary Units (MEUs). MEU deployments run six to seven months aboard ship, with the maintenance section responsible for keeping vehicles operational throughout the float. You are responsible for the ACV fleet being ready to conduct an amphibious assault on day one of any crisis the MEU responds to.

Ground deployment options include rotational assignments to Okinawa through the Unit Deployment Program (UDP), which runs in six-month increments. Combat deployments occur when the Marine Corps is tasked with contingency operations, and 2141s go with the unit.

During a MEU float, the maintenance section works from the ship’s vehicle storage decks. You have a dedicated work space but limited parts supply. Getting the right part to the ship mid-float requires a supply chain that runs through the MEU logistics officer, so pre-deployment parts staging and pre-positioning critical spares is a skill that experienced 2141s develop early.

Primary Duty Stations

Most 2141 billets are concentrated at Camp Pendleton and Camp Lejeune. These are the two centers of gravity for ACV operations. Camp Lejeune sits near Jacksonville, NC, a mid-sized military town with lower cost of living and strong support infrastructure for Marines with families. Camp Pendleton is in Southern California, with higher costs of living offset by BAH rates that reflect the local housing market.

Duty station assignments are driven by MOS needs and billet availability. You can submit a preference, but the Marine Corps fills the billet first. Marines who build a strong record at their first duty station and communicate clearly with their career monitor during the monitor/mentee process have better odds of influencing their next assignment.

Risk, Safety, and Legal Considerations

Job Hazards

ACV maintenance carries hazards specific to working on heavy amphibious vehicles:

• Crush and pinch hazards from track components, ramp assemblies, and pressurized hydraulic systems
• Hydraulic system injuries: a hydraulic line under pressure can inject fluid through skin and cause severe internal injury with no visible wound
• Chemical exposure to hydraulic fluid, diesel fuel, coolant, battery acid, and brake fluid
• Electrical hazards from 24-volt and 28-volt vehicle electrical systems
• Heat and fire risk during welding operations and around vehicle fuel systems
• Water operation hazards during amphibious training: vehicle flooding, hull seal failures, and currents during ship-to-shore movements
• Recovery rigging hazards including snapped cables and vehicle movement under tension

The water environment is what separates ACV maintenance from standard tracked vehicle work. Pre-water-operation inspections are not optional, and a missed hydraulic seal or ramp seal failure during a water crossing is a life-safety issue. Every 2141 who works on amphibious vehicles internalizes this early: the vehicle’s job is to carry Marines from ship to shore. Your job is to make sure it does not fill with water before it gets there.

Safety Protocols

Marine Corps maintenance safety is governed by unit safety programs and technical manual procedures. Personal protective equipment (hearing protection, eye protection, gloves, and steel-toed boots) is mandatory in maintenance areas. Tool control programs prevent lost hardware from ending up inside vehicle systems. Recovery operations require a safety observer and rigging certification before anyone takes tension on a cable.

Shops maintain Material Safety Data Sheets for all chemicals on hand. Hydraulic fluid exposure and diesel fume inhalation are cumulative health risks that Marines are expected to mitigate through proper ventilation, PPE use, and medical monitoring. A 2141 who develops occupational hearing loss or respiratory irritation from years of maintenance work should document those conditions through the medical system for potential VA claims after separation.

Security and Legal Requirements

MOS 2141 does not require a security clearance for entry. Some billet assignments at higher-headquarters maintenance activities may require a clearance later in a Marine’s career, but this is not a standard requirement. Standard UCMJ obligations apply to all Marines. If you receive a reenlistment bonus and separate before completing the service obligation, repayment may be required.

Impact on Family and Personal Life

Life at Camp Lejeune vs. Camp Pendleton

Where you live matters as much as what you do. Most 2141s will spend significant time at one or both of these installations, and the lifestyle differences are real.

Camp Lejeune is in Jacksonville, NC, a city built around the base. Housing costs are lower than the national average, and the off-base rental market is manageable on a junior enlisted BAH. The deployment cycle from Lejeune follows 2d Assault Amphibian Battalion’s MEU workup schedule, which provides some predictability for families. Winters are cold and wet; summers are hot and humid. The base has a full family support structure: schools, childcare through MCCS, and a Family Readiness Officer (FRO) in every battalion.

Camp Pendleton is in Oceanside, CA, between Los Angeles and San Diego. Housing costs are significantly higher. BAH rates reflect the local market, so the housing allowance is larger, but it goes further in Jacksonville than in Oceanside. The civilian job market surrounding Pendleton is strong for a working spouse, and the climate is mild year-round. The Assault Amphibian School is at Camp Del Mar on the Pendleton coastline, so Marine students train close to where operational units are stationed.

Both installations have Marine Corps Family Team Building (MCFTB), Military OneSource counseling, and financial readiness programs available at no cost.

Deployment Impact on Families

MEU floats mean six to seven months away from home. The MEU workup cycle (roughly 18 months of training followed by the deployment) gives families more runway to plan than open-ended contingency deployments. But three or four MEU rotations over a career adds up. Families who do well in this community tend to build strong support networks at the unit level, not just through official programs.

UDP rotations to Okinawa are unaccompanied. Families stay stateside. Six months in Okinawa means six months of single-parent household management for your spouse or partner. That is a recurring feature of ACV unit life, not an edge case.

Relocation Across a Career

With most billets concentrated at two installations, PCS moves are less frequent than in broader MOS fields but more predictable. Plan on moving every two to three years. If your family can settle into one of the two main communities, the constant relocation burden is lower than it is for Marines in high-demand, high-distribution MOS fields.

Marine Corps Reserve

The assault amphibian community has a Reserve component, but billet availability for MOS 2141 in the Reserve is limited. Most Reserve billets exist with units near Camp Pendleton or Camp Lejeune, mirroring the active-duty footprint.

Active vs. Reserve Comparison

Reserve drill pay at E-4 breaks down as four drill periods per weekend. Each period equals one day of active-duty base pay. At the E-4 under-2-year rate of $3,142/month, one period pays approximately $105 and a full weekend pays roughly $419.

Civilian Career Integration

A Reserve 2141 who works as a heavy equipment mechanic or fleet maintenance technician in their civilian job will find strong alignment. Construction companies, mining operations, port authorities, and defense maintenance contractors all operate heavy vehicle fleets. Military-trained mechanics bring discipline, technical manual fluency, and documentation habits that civilian employers notice.

USERRA protections require civilian employers to hold jobs and benefits for Reservists during mobilization. Most employers in industrial maintenance fields are familiar with these protections and work around them without issue.

Reserve Deployment

Reserve 2141s can be mobilized under Title 10 orders to support contingency operations or to backfill active-duty units. Typical mobilization length runs six to twelve months. During mobilization, Reserve Marines receive the same pay and benefits as their active-duty counterparts.

Post-Service Opportunities

Civilian Career Paths

The mechanical maintenance skills built in MOS 2141 transfer directly to heavy vehicle and equipment careers. Marines who add civilian certifications during service through the COOL program stand out to employers immediately.

Salary and outlook data from the Bureau of Labor Statistics Occupational Outlook Handbook.

Beyond general mechanic roles, the ACV program itself generates civilian employment. BAE Systems employs field service representatives and depot-level technicians who support the ACV fleet at Marine installations. These positions specifically value 2141 experience. Marines who separate with four to six years of ACV maintenance time are competitive candidates for BAE Systems contractor roles that pay substantially above the median mechanic salary.

Certifications and Credentials

The ASE (Automotive Service Excellence) T-series (Medium/Heavy Truck) and L-series (Advanced Level Specialist) exams are the civilian standard for vehicle mechanics. MOS 2141 experience prepares you well for both. The Marine Corps COOL program can cover certification costs during active service.

USMAP (United States Military Apprenticeship Program) enrollment during service allows you to complete a recognized apprenticeship in a related trade. That carries direct value with union employers, government agencies, and municipal fleet operations after separation.

Transition Support

The Transition Readiness Program (TRP) provides career counseling, resume workshops, and employer connections during terminal leave and separation. Marines separating from Camp Pendleton have access to the Hiring Our Heroes fellowship program with direct employer access in the San Diego and Southern California defense maintenance sector. Veterans with service-connected conditions access VA disability compensation and vocational rehabilitation if medical conditions affect post-service employment.

Is This a Good Job for You? The Right (and Wrong) Fit

Strong Match

This MOS suits Marines who:

• Genuinely like mechanical work and find troubleshooting satisfying, not tedious
• Read and follow technical manuals without looking for shortcuts
• Take equipment condition personally: you notice things wrong before they become failures
• Want a small-community feel where individual performance is visible and gets recognized quickly
• Are willing to anchor most of a career to Camp Pendleton or Camp Lejeune with limited flexibility

The job rewards patience and precision more than speed. A Marine who rushes through a preventive maintenance check is a liability in this MOS.

Potential Challenges

The smaller community means fewer billets, fewer duty station options, and fewer peers at the same rank compared to high-volume MOS fields. Marines who want maximum flexibility in assignments should weigh that tradeoff carefully.

MEU workups and UDP rotations are consistent features of the job. That tempo suits Marines who want to deploy and see the platform work, but it wears on families across multiple rotations. Be honest with your family about what the cycle looks like before you sign the contract.

Long-Term Fit

A 2141 Marine who stays in for eight to twelve years and masters both platforms becomes one of the most technically specialized people in the ground maintenance community. That expertise has real value on the civilian side in defense contractor roles, fleet maintenance management, and BAE Systems field service technician positions. The path requires commitment to a narrow specialty and a willingness to make the platform your professional identity. For the right person, that’s not a limitation. It’s the point.

This site is not affiliated with the U.S. Marine Corps or any government agency. Verify all information with official Marine Corps sources before making enlistment or career decisions.

More Information

Talk to a Marine recruiter or visit your nearest Marine Corps Recruiting Station to get current MOS availability, contract options, and any enlistment incentives that apply. Recruiters have access to live seat availability in the 2141 pipeline and can confirm whether the MOS is open in your enlistment window. If you still need to take the ASVAB, the PiCAT guide explains how to prescreen before your MEPS visit, and the ASVAB preparation guide covers study strategies for the MM composite subtests.

Explore more Marine Corps ground ordnance maintenance careers such as 2111 Small Arms Repairer/Technician and 2147 Light Armored Vehicle Repairer/Technician.

Need score context? Review the ASVAB guide and the PiCAT guide before publishing permanent MOS content.