2621 Communications Intelligence/Electronic Warfare Operator

You sit at a collection station, tune to the target frequency, and listen. When you find the signal you were told doesn’t exist, you document it, timestamp it, and pass it up. That’s the job. The Marine Corps 2621 Communications Intelligence/Electronic Warfare Operator works the part of the electromagnetic spectrum where adversaries communicate. You collect signals data, build a picture of what enemy forces are doing, and feed that picture to the people who need it before the next operation kicks off.

This MOS sits inside OccFld 26, the Signals Intelligence, Electronic Warfare, and Cyberspace Operations field. It is one of the most technically demanding enlisted roles in the Corps and one of the most restrictive to access. If you score high on the ASVAB, can pass a TS/SCI background investigation, and want work that carries direct weight in operations, 2621 is worth understanding in detail.

Job Role and Responsibilities

The 2621 Communications Intelligence/Electronic Warfare Operator collects, processes, and exploits signals in the communications spectrum to support Marine Corps intelligence and electronic warfare missions. Marines in this role operate specialized collection systems, identify signal activity across the electromagnetic spectrum, and produce reporting that feeds tactical and operational decision-making. The work is technical, classified, and conducted in both garrison and deployed settings.

The day-to-day is more methodical than dramatic. A shift starts with systems checks, a review of collection tasking, and coordination with the watch supervisor about what signals are priority. Then you get on the equipment. You scan assigned frequency ranges, identify traffic, tag it, and route it for further processing. Some shifts produce nothing useful. Others produce something that matters, and when they do, it moves fast up the chain.

What You Do Every Day

• Operate communications intelligence collection systems and monitor the electromagnetic spectrum for target signals
• Identify, sort, and tag signal data for further exploitation and reporting
• Support electronic warfare operations by providing collection data that helps commanders understand threat emitter activity
• Maintain collection platforms, antennas, direction-finding systems, and associated equipment
• Prepare intelligence products and signal reports under the oversight of senior intelligence personnel
• Follow strict security and handling procedures for classified systems and data

Specific Roles

Marines may also earn additional MOS designators tied to specific system qualifications or joint assignments as their career progresses.

Mission Contribution

The Marine Corps depends on an accurate picture of what adversaries are communicating and how they are using the electromagnetic spectrum. A 2621 operator is one of the Marines responsible for building that picture. Collection from communications intelligence directly supports command decisions about maneuver, targeting, and force protection. The work is invisible to most of the operating force, but the intelligence it produces shapes how commanders see the battlefield before the shooting starts.

Technology and Equipment

2621 Marines work with classified collection systems, direction-finding antennas, software-defined radios, and signal processing equipment. Some of this technology is vehicle-mounted or man-portable. Some lives in fixed collection facilities or command intelligence elements. The specific systems are classified, but the pattern is consistent: you operate and maintain technical gear that requires both electronics knowledge and operational discipline.

Salary and Benefits

Financial Benefits

Base pay for 2621 Marines follows the standard 2026 DFAS enlisted pay scale. Pay is determined by paygrade and years of service.

Source: DFAS 2026 pay tables. Figures reflect the 2026 pay raise.

Marines in this MOS may also qualify for special pays including:

• Career Sea Pay when assigned to shipboard or afloat units
• Hostile Fire / Imminent Danger Pay during qualifying deployments ($225/month)
• Reenlistment bonuses when the Marine Corps designates 2621 as a critical skill; verify current amounts with your recruiter or career planner

In addition to base pay, Marines receive Basic Allowance for Subsistence (BAS) of $476.95 per month (2026 rate) and Basic Allowance for Housing (BAH), which varies by duty location, paygrade, and dependency status.

Additional Benefits

TRICARE Prime covers active-duty Marines at no cost. There are no enrollment fees, deductibles, or copays for in-network care. Coverage includes medical, dental, vision, mental health, and prescriptions. Family members are also enrolled at no cost when added to the plan.

The Post-9/11 GI Bill provides up to 36 months of education benefits after qualifying service. For public universities it covers full in-state tuition and mandatory fees. For private schools the 2025-2026 academic year cap is $29,920.95. Marines who serve six years and agree to an additional four-year obligation can transfer benefits to dependents. Federal Tuition Assistance is available during active service, covering up to $4,500 per year toward coursework.

Retirement under the Blended Retirement System includes a defined pension at 20 years equal to 40% of your high-36 average basic pay, plus TSP matching up to 5% of basic pay starting in your third year of service.

Work-Life Balance

Marines earn 30 days of paid leave per year, accruing at 2.5 days per month. Leave can carry over up to 60 days. Work schedules in 2621 vary by assignment. Garrison-based collection units often run shift work tied to mission cycles. Deployed or MEU environments involve longer operational hours. Technical MOS fields like this one tend to have less unpredictable off-hours callout than combat arms, but they are still subject to operational tempo requirements and can run 24-hour coverage rotations.

Qualifications and Eligibility

Basic Qualifications

The GT score carries the most weight for 2621. GT (General Technical) is built from Verbal Expression, Arithmetic Reasoning, and Mechanical Comprehension. Marines with GT scores at or above 110 are eligible; those at 115 or higher are competitive for the schoolhouse. The EL composite (General Science + Arithmetic Reasoning + Mathematics Knowledge + Electronics Information) reflects electronics aptitude that maps directly to collection work.

Start your ASVAB preparation early with the ASVAB study guide or the PiCAT practice tool if you want to take the unproctored pre-screen before your MEPS appointment.

Application Process

1. Contact a Marine Corps recruiter and express interest in OccFld 26 or specifically MOS 2621
2. Take the ASVAB or PiCAT; scores must meet GT and EL thresholds
3. Complete MEPS processing including physical and background review
4. Submit information required for a Tier 5 (Top Secret) background investigation
5. Receive a conditional enlistment contract for the 26 field; final MOS assignment within 26XX may occur after schoolhouse screening
6. Attend Boot Camp at Marine Corps Recruit Depot (Parris Island or San Diego)
7. Complete Marine Combat Training (MCT) at SOI-East or SOI-West
8. Report to MOS schooling at the appropriate SIGINT/EW schoolhouse

The background investigation for a TS/SCI clearance typically takes months to over a year depending on the applicant’s history. Recruits with complicated financial histories, foreign contacts, or prior legal issues may face longer adjudication timelines or denial.

Selection Criteria and Competitiveness

MOS 2621 is selective. The clearance requirement alone removes a significant portion of otherwise-qualified applicants. Marines who are competitive typically have GT scores well above the minimum, no foreign national family contacts that complicate the TS/SCI investigation, clean financial backgrounds with no history of delinquency or bankruptcy, and strong performance on any technical screening during processing. Prior experience with electronics, amateur radio, or telecommunications is not required but demonstrates relevant aptitude.

Upon Accession into Service

Marines enter active duty as E-1 (Private) regardless of prior education unless qualifying college credits or other programs apply. The standard active-duty enlistment is four years, though specific contracts may vary. Retention bonuses and reenlistment incentives tied to critical skills exist but must be verified against current guidance at accession.

Work Environment

Setting and Schedule

Most 2621 Marines work in a combination of classified work spaces, mobile collection platforms, and tactical operations settings. Fixed-facility work typically involves shift-based schedules tied to collection coverage requirements. Deployed work adapts to mission cycles and may require sustained operations across extended hours.

The work is primarily seated and focused. Sustained attention is the core job requirement. Collection shifts can run six to twelve hours. The environment is climate-controlled in garrison. Field deployments vary depending on the platform. Some are vehicle-mounted with basic comfort. Others are field-expedient with no climate control at all.

Leadership and Communication

2621 Marines report to a chain of command that spans collection supervisors, senior intelligence NCOs, and commissioned intelligence officers. Feedback on collection quality, report accuracy, and equipment handling is part of the daily work cycle. Formal performance evaluations for junior enlisted Marines use proficiency and conduct marks. Staff NCOs receive FITREPs (Fitness Reports).

Communication in this field is disciplined by necessity. Classified information has strict handling rules. The operational norm is to discuss mission details only with cleared personnel on a need-to-know basis.

Team Dynamics and Autonomy

Collection operations run as team efforts. Operators work alongside other 2621 and 2631 Marines, supported by intelligence analysts and EW specialists. A junior Marine does not work entirely alone, but sustained individual attention is still the core skill demand. You need to stay sharp during a six-hour shift on a quiet band, because the moment something shows up, documentation and routing have to happen immediately.

As Marines advance to Corporal and Sergeant, they gain responsibility for collection tasking, report review, and supervising junior operators during shift operations. Gunnery Sergeants and above may manage entire collection detachments.

Job Satisfaction and Retention

The technical depth of this MOS, combined with the clearance value and civilian career potential, contributes to above-average retention interest in OccFld 26. Marines who enjoy intelligence work, dislike purely physical duty cycles, and want mission work with real operational impact tend to report high satisfaction. The frustrations are usually tied to operational security constraints, limited public acknowledgment of the work, and the pace of clearance-related bureaucracy.

Training and Skill Development

Initial Training

Goodfellow Air Force Base is the primary SIGINT schoolhouse for joint military training. Marines assigned to 2621 attend courses alongside Navy, Army, and Air Force students under a joint intelligence curriculum. The training is rigorous, technically demanding, and heavily classified. Passing requires sustained academic performance across electronics theory, signals fundamentals, and system operation.

The schoolhouse is not a casual environment. Students who struggle academically are counseled and may be reclassified before completing the course. Marines who arrive with a strong electronics or signals background tend to move through the material faster, but the content goes well beyond what most applicants encounter in civilian life. Expect to study outside class hours, and expect the classified material to be genuinely unfamiliar.

Collection operations are only part of what Marines train for. The MOS school curriculum also covers radio frequency fundamentals, antenna theory, signal exploitation procedures, and intelligence reporting formats. By the time a 2621 Marine arrives at their first unit, they have a working knowledge of how the electromagnetic spectrum operates tactically and how to turn what they find into a useful intelligence product.

Advanced Training

After completing initial MOS schooling, 2621 Marines may pursue:

• Advanced SIGINT analyst courses tied to specific collection systems or reporting platforms
• Electronic warfare integration training with operational units
• Joint collection operations courses at NSA and other national-level intelligence facilities
• Language training through the Defense Language Institute (DLI) if the Marine qualifies for a language designator assignment
• Senior leader courses through the Marine Corps Intelligence Activity (MCIA) and joint intelligence training programs

The Marine Corps supports professional development in technical intelligence fields because the investment pays in retention and operational capability. Marines who pursue additional certifications in cybersecurity, signals analysis, or technical systems find that the combination of service time and clearance creates strong post-service outcomes.

Language training at DLI deserves specific mention. Marines who earn a language designator receive additional monthly special pay tied to their proficiency level and can access assignments at joint and national-level collection units that are otherwise unavailable. The commitment is significant (DLI courses run six to eighteen months depending on the language) but the career payoff is real.

Career Progression and Advancement

Career Path

Specialization and Additional MOS

• 2623 SIGINT Analyst: An NMOS available after qualifying training. It shifts the Marine’s primary emphasis from operator to analyst duties.
• 2629 SIGINT Chief: An FMOS awarded at the SNCO level recognizing mastery of collection management and reporting.
• Language designators: Marines who complete DLI training receive a language designator, which can significantly expand assignment options and special pay eligibility.

Role Flexibility and Transfers

Marines can request an MOS lateral move (LATMOVE) through the program managed by Manpower and Reserve Affairs. For a lateral move out of 2621, the Marine must have served enough time in the primary MOS to demonstrate qualifications and must receive command approval. Moving from 2621 to other 26XX MOS codes is administratively simpler than crossing occupational fields.

Performance Evaluation

Junior enlisted Marines (E-1 through E-4) are evaluated through proficiency and conduct marks that contribute to promotion consideration. NCOs and SNCOs receive FITREPs documenting performance against peers and leadership criteria. In a technical field like 2621, documented collection accomplishments, reporting quality, and demonstrated system expertise all feed competitive fitness reports.

Physical Demands and Medical Evaluations

Physical Requirements

2621 is a technical MOS, but Marine Corps readiness standards apply regardless of specialty. Marines must pass the Physical Fitness Test (PFT) and Combat Fitness Test (CFT) on the current schedule, typically twice per year.

Daily physical demands in 2621 are moderate. The job does not involve heavy lifting or sustained outdoor labor in normal garrison operations. Field exercises and deployments are different. Marines carry gear, set up antenna systems and collection equipment, and sustain operations in varied climates over extended periods.

During exercises and MEU workups, 2621 Marines deploy antenna masts, run cables, and set up collection equipment in field environments that are anything but climate-controlled. Vehicle-mounted collection platforms require operators to work in and around tactical vehicles in all weather. Man-portable systems require carrying equipment over terrain. The intelligence mission does not wait for ideal conditions.

Marines who underinvest in physical fitness training ahead of a technical MOS often find themselves underprepared for field exercises, even if garrison duty does not demand sustained physical output. Running a 25-minute three-mile is passable. Running it after carrying equipment across a field exercise site for three days is a different test. Maintaining well above the minimum standards is the practical expectation, not a preference.

PFT and CFT Standards (2026, Age Group 17-20)

Standards are verified against current Marine Corps publications. Consult marines.mil for the most current scoring tables before planning your preparation.

Medical Evaluations

Marines complete a full MEPS physical before accession. Ongoing medical requirements include periodic physicals as part of the Marine Corps medical readiness system. Specific requirements tied to clearance renewal may also include periodic reinvestigations of lifestyle and background factors.

Deployment and Duty Stations

Deployment Details

2621 Marines deploy as part of Marine Expeditionary Units (MEUs), Marine Expeditionary Forces (MEFs), and joint intelligence operations. MEU rotations typically run seven months. Deployed collection operations take place aboard ship, at forward operating bases, or in joint intelligence support environments.

The assignment base for OccFld 26 Marines concentrates around two radio battalions and III MEF forward. Here is what that looks like in practice:

• 1st Radio Battalion (Camp Pendleton, CA): Primary SIGINT and EW unit for I MEF. Marines here support Pacific-focused operations and deploy with MEUs out of the West Coast.
• 2nd Radio Battalion (Camp Lejeune, NC): Primary SIGINT and EW unit for II MEF. Supports Atlantic and Mediterranean deployments, as well as operations in Africa and Europe under AFRICOM and EUCOM rotations.
• III MEF (Camp Courtney / Camp Hansen, Okinawa, Japan): Forward-deployed presence in the Pacific. Marines stationed in Okinawa work in one of the highest-operational-tempo environments in the Corps.
• Marine Special Operations Command (MARSOC, Camp Lejeune, NC): Select 2621 Marines with advanced qualifications and experience support USSOCOM-assigned missions at the special operations level.

Deployment frequency is real. Marines in this field should plan to deploy multiple times over a career. A typical 2621 career includes at least two to three MEU rotations, plus possible joint or combatant command assignments between unit tours.

Location Flexibility

Beyond the radio battalions, additional duty station options include:

• Marine Corps Base Quantico, Virginia (Marine Corps Intelligence Activity)
• MCAS Kaneohe Bay, Hawaii (III MEF forward support)
• Various joint intelligence and NSA-affiliated facilities depending on assignment

Duty station preferences can be submitted but are not guaranteed. Assignment officers weigh the Marine’s qualifications, billet availability, and the needs of the Marine Corps.

Most 2621 Marines spend their early careers bouncing between one radio battalion, a MEU rotation, and potentially an overseas tour. The typical pattern is a unit tour of two to three years, followed by a PCS move to a different installation. For Marines who go to Okinawa, tours run 12 months unaccompanied or 36 months accompanied. Hawaii is a standard accompanied tour of 36 months. Both are popular assignment options that tend to fill quickly.

Risk, Safety, and Legal Considerations

Job Hazards

The primary operational risks in 2621 come from deployed environments. Marines embedded with MEUs or forward deployed to combat-adjacent locations carry the same general risk profile as other deployed Marines in those settings.

There is also an RF exposure consideration specific to this field. 2621 Marines work with radio frequency collection equipment, and some platforms involve high-power transmitters or antenna systems. The Marine Corps follows DoD RF safety guidance to limit occupational exposure, and operators receive training on safe distances, power limits, and equipment-specific precautions.

Safety Protocols

Classified system handling follows COMSEC and OPSEC protocols that Marines learn in MOS schooling and reinforce throughout their career. TEMPEST requirements govern classified communications environments. They protect against unintended electromagnetic emissions that could expose classified information. Physical security of collection facilities includes access control, two-person integrity requirements for certain systems, and strict procedures for removing classified material.

Security and Legal Requirements

All 2621 Marines must hold an active TS/SCI security clearance. What that means in practice goes beyond the paperwork:

• Foreign travel becomes restricted or requires pre-approval after you hold a TS/SCI. Spontaneous international trips are not compatible with this clearance.
• Social media use is scrutinized. Posting about your unit, assignment, or work, even in vague terms, can trigger a security inquiry.
• Financial disclosure is required periodically. Significant new debt, a bankruptcy, or financial stress can trigger reinvestigation or access suspension.
• Polygraph requirements may apply depending on the specific program or assignment. Not all 2621 billets require polygraphs, but some national-level assignments do.
• Insider threat training is mandatory and recurring. You learn to recognize the behaviors that flag a clearance concern, in yourself and in your peers.
• NDAs cover every classified system and program you touch. These obligations do not expire when you leave the Marine Corps. Discussing classified information after separation is a federal offense.

Reinvestigations occur periodically, typically every five years for TS/SCI holders. The investigator looks at everything again: finances, foreign contacts, lifestyle changes, and personal conduct.

Impact on Family and Personal Life

Family Considerations

The TS/SCI clearance investigation does not stop at you. Your immediate family members, particularly a spouse, will likely be interviewed during the background process. Investigators may ask about your finances, behavior, any foreign contacts, and general lifestyle. This is standard, but it can feel intrusive if the family is not prepared for it.

Deployment separation for an intel MOS looks different from a combat arms deployment in some ways, but the time away is the same. A MEU rotation runs seven months. That means seven months of single-parent management for families with children, seven months of the family not knowing the specific details of what you are doing or where you are. The classified nature of the work means you cannot always explain your schedule, your location, or what is keeping you busy. Some families adapt to that easily. Others find it genuinely difficult.

The Marine Corps Family Team Building (MCFTB) program, Military OneSource, and Marine Corps Community Services (MCCS) provide support at all major installations. Programs include counseling, financial guidance, childcare referrals, and deployment readiness resources. These programs are real and used widely by OccFld 26 families.

Relocation and Flexibility

Marines in 2621 should expect relocation every two to three years following normal Permanent Change of Station (PCS) cycles. Overseas assignments to Okinawa and Hawaii are part of the standard rotation. PCS moves are compensated through moving allowances, but the personal disruption of frequent relocation affects families with school-age children in particular.

Families who research base amenities, local schools, and housing options before a PCS orders assignment tend to adjust more smoothly. Spouse employment is a real concern at remote or overseas locations. Kaneohe Bay and Okinawa both have active spouse employment programs, but the job market at overseas installations is limited. Families considering this MOS should have an honest conversation about what frequent relocation over a 4-to-20-year career looks like in practice before signing a contract.

Marine Corps Reserve

Component Availability

MOS 2621 is available in the Marine Corps Reserve, but billets are more limited than in broader support fields. Reserve units with SIGINT and EW functions exist at select locations. Access depends on available seats and the Marine’s ability to maintain clearance currency between training periods.

Drill Schedule and Training Commitment

Reserve Marines follow the standard one weekend per month plus two weeks of Annual Training commitment. For 2621, the additional demands include maintaining clearance currency, periodic system recertification, and skill refreshers that may require additional training days beyond the standard drill schedule.

Part-Time Pay

An E-4 Corporal with fewer than two years of service earns $3,142.20 per month on active duty (2026 DFAS rate). A drill period pays approximately 1/30 of monthly base pay, so a standard four-period drill weekend yields approximately $419 before taxes. A more experienced E-4 Corporal with three years of service earns $3,482.40 per month, putting a drill weekend at roughly $465.

Benefits Differences

Deployment and Mobilization

Reserve 2621 Marines can be mobilized under Title 10 orders for named operations, theater security engagement, or augmentation of active-duty intelligence elements. Mobilization lengths vary but typically run 12 months. Reserve Marines in clearance-heavy fields like 2621 are valuable augmentees when active-duty billets are stressed during sustained operations.

Civilian Career Integration

A reserve 2621 billet complements civilian work in defense contracting, intelligence analysis, or federal law enforcement. The combination of an active clearance and regular training currency is genuinely valuable to contractors and agencies that need cleared personnel. USERRA protects reserve Marines from adverse employment actions tied to military service, and many defense-sector employers actively support reserve commitments.

Post-Service Opportunities

Transition to Civilian Life

The most direct civilian path from 2621 is intelligence analysis or SIGINT-related work with the federal government or defense contracting community. The TS/SCI clearance is the most immediately transferable asset at separation. Cleared roles in the defense sector pay significantly more than comparable uncleared positions, often 20 to 40 percent more for the same work.

Specific target employers worth researching before your EAS date:

• NSA (National Security Agency): Civilian GS-7 through GS-13 entry paths for SIGINT veterans. Familiarity with collection tradecraft and platforms is directly valued.
• CIA Directorate of Operations and Directorate of Digital Innovation: Collection experience and TS/SCI access put 2621 veterans in a competitive position.
• DIA (Defense Intelligence Agency): Intelligence analyst and technical roles at the GS-9 to GS-13 level regularly draw from enlisted SIGINT veterans.
• DCSA (Defense Counterintelligence and Security Agency): Investigator and adjudicator roles for veterans with clearance experience.
• Defense contractors: Booz Allen Hamilton, SAIC, L3Harris, Leidos, CACI, and Perspecta all maintain active pipelines for cleared SIGINT and EW veterans.

The Transition Readiness Program (TRP) provides pre-separation counseling, resume assistance, and career workshops. Begin the TRP at least 180 days before your EAS date.

Civilian Career Prospects

Salary figures are approximate based on BLS Occupational Outlook Handbook data. Cleared positions frequently carry additional compensation above these medians.

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

Ideal Candidate Profile

2621 fits Marines who are genuinely interested in how signals and the electromagnetic spectrum work. The MOS label is not the point. The work is. You should be comfortable with sustained attention, classified environments, and work that does not get publicly acknowledged. Strong math and science aptitude is a practical requirement.

You should also be comfortable with the clearance lifestyle. Financial discipline, limited foreign contact, and a clean personal history are ongoing obligations, not one-time hurdles.

Potential Challenges

This MOS is a poor fit if you want visible, action-oriented daily work. Collection operations are methodical, repetitive, and require precision. Shift work in a secure facility is the routine. Marines who need external validation or who find sustained desk-adjacent work demotivating will struggle with the daily reality of 2621.

The clearance process is also genuinely burdensome. If your background has financial complications, foreign nationals in your immediate family, or any prior drug use, expect a difficult investigation timeline and potentially no access at all.

Career and Lifestyle Alignment

2621 is a strong fit for Marines who plan a full career in intelligence, defense contracting, or federal service. The skills, clearance, and experience compound over time. If your goal is to serve four years and move on quickly, the investment the Corps makes in training you may create retention pressure you should understand before committing.

A four-year enlistment in 2621 typically ends with a Marine who has completed Boot Camp, MCT, a schoolhouse pipeline of six to twelve months, and perhaps one unit tour. That unit tour may include a MEU rotation. At that point, the Marine is just becoming genuinely useful in the field. The Corps knows this, which is why reenlistment bonuses for critical intelligence skills can be significant when available. If you are planning to leave at four years, be honest with yourself about why, and be prepared for your chain of command to make a strong case for staying.

For Marines who do stay, the compounding value is real. A 2621 Marine with eight years of experience, an active TS/SCI clearance, and a language designator is positioned for some of the most sought-after billets in the joint intelligence community. That profile does not get built in four years. It gets built over a career of deliberate assignments, continuous technical development, and the kind of operational exposure that only comes from repeated deployments in high-demand fields.

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

To learn more about MOS 2621 and how to qualify for OccFld 26, contact your local Marine Corps Recruiting Station (RSS) or visit marines.com. A recruiter can pull current ASVAB minimums directly from the recruiting system and tell you whether open seats exist in this field for your contract window.

Explore more OccFld 26 Signals Intelligence, Electronic Warfare, and Cyberspace Operations careers such as 2631 Electronic Intelligence/Electronic Warfare Analyst and 2651 ISR Systems Engineer.

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