army joint fire support specialist - mos 13f

Army Joint Fire Support Specialist (MOS 13F): 2023 Career Details

Joint Fire Support Specialists (MOS 13F) gather intelligence for the U.S. Army and its artillery teams.

Also commonly known as forward observers, there are several duties in MOS 13F that include establishing communication systems, encoding and decoding messages, and determining target locations.

Learn more about the expectations of an Army Joint Fire Support Specialist (MOS 13F) by reading about job expectations, required training, duties, and pay.

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Education, Qualifications, Training, and Duty Stations

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Army Joint Fire Support Specialists (MOS 13F) are skilled at gathering intelligence and locating key enemy targets. Image:

Army Joint Fire Support Specialists support the Army artillery team, which is out in the field during combat.

The forward observer specialist needs to use computers as well as manual calculations in order to determine target locations.

As a result, there is some education, qualifications, and training required.


The U.S. Army will consider anyone with a high school diploma or GED for starters.

If you are interested in the Army, you should consult a nearby recruiting office.

Army recruiting offices are located all over the nation, and a rep can also contact you over the phone. 

The recruiter will explain that the next step is to complete the Armed Services Vocational Aptitude Battery (ASVAB).

The series of tests are used to determine what military MOS listing is most appropriate for your skills.

If you are interested in MOS 13F, you need to have a score of at least 96 on Field Artillery (FA).

The other subtests you must complete on the ASVAB are Arithmetic Reasoning (AR), Mathematics Knowledge (MK), Coding Speed (CS), and Mechanical Comprehension (MC).

Your AFQT score on the ASVAB, a combination of your scores on Arithmetic Reasoning, Mathematical Knowledge, Word Knowledge, and Paragraph Comprehension, must be a minimum of 31 to join the Army.

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After completing the ASVAB and scoring 96 in Field Artillery (FA), it is time to meet other job requirements of an Army Joint Fire Support Specialist (MOS 13F).

There is a Secret security clearance required to become MOS 13F.

The process of gaining a Secret security clearance requires a very thorough investigation into your personal character and conduct.

Because of their duties acting as forward observers, Army Fire Support Specialists also must have good eyesight.

This includes having normal depth perception, no colorblindness, and distant visual acuity are all important.

It should be noted that the vision requirements allow you to use corrective lenses to qualify.

Though not mandatory, the Army mentions that MOS 13F should work well in a team, be physically fit, and be mentally prepared to work under high pressure, along with the ability to multi-task.

An interest in cannon and rocket operations is an added bonus, but not completely necessary.


All new Army recruits begin with boot camp, which is officially called Basic Combat Training (BCT).

Basic Combat Training lasts for 10 weeks before progressing to Advanced Individual Training (AIT).

AIT for Army Joint Fire Support Specialists (MOS 13F) takes place at Fort Sill in Oklahoma and lasts for 11 weeks.

Like all other Advanced Individual Training in the Army, learning is a combination of in-classroom and on-the-field training.

You will learn how to operate guns, missiles, and rocket systems.

There is also training for artillery tactics, techniques, and procedures.

A huge duty of an Army Joint Fire Support Specialist is to compute target locations, which you will also receive training on at Fort Sill.

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Duty Stations

Those serving in the Army in MOS 13F can expect to be potentially based at one of the following duty stations:

Inside the Continental US (CONUS)

  • Fort Bliss, TX
  • Fort Campbell, KY
  • Fort Carson, CO
  • Fort Cavazos, TX
  • Fort Drum, NY
  • Fort Hunter Liggett, CA
  • Fort Johnson, LA
  • Fort Leonard Wood, MO
  • Fort Liberty, NC
  • Fort Moore, GA
  • Fort Riley, KS
  • Fort Sill, OK
  • Fort Stewart, GA
  • Joint Base Lewis-McChord, WA

Outside the Continental US (OCONUS)

  • Fort Wainwright, AK
  • Joint Base Elmendorf-Richardson, AK
  • USAG Ansbach, Germany
  • USAG Bavaria, Germany
  • USAG Hawaii
  • USAG Humphreys, South Korea
  • USAG Yongsan-Casey, South Korea

What does an Army Fire Support Specialist Do?

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MOS 13F work as part of an artillery team in order to engage the enemy. Image: U.S. Department of Defense

Joint Fire Support Specialists are a member of the field artillery team in the U.S. Army.

As a result, they deal with high-powered weapons like rockets and missiles that support ground infantry and tank units during combat.

Intelligence Gathering

Though MOS 13F are trained to use heavy artillery, their primary responsibility is to lead, supervise, or serve in intelligence activities.

The most important form of intelligence is locating targets and processing artillery units and brigade maneuvers to act accordingly.

As a result, MOS 13F will establish a communications system, which they can operate during battle.

There is also the need to use intelligence to encode and decode messages.

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Enemy Targets

Army Joint Fire Support Specialists use laser range fingers and other target devices to locate the enemy via forward observation.

The objective is to determine target location using computers or manual calculations, aspects you will be trained on during AIT.

Soldiers in MOS 13F will also provide backup in combat situations where they may need to request or adjust field artillery, mortar, or naval gunfire.

Additionally, soldiers are sometimes called upon for suppressive and screening fire.

Clerical Work

Though it may not sound as exciting as action in the field, Army Joint Fire Support Specialists spend a good deal of time doing clerical duties.

These tasks may not seem urgent or interesting yet are critical to the overall welfare of the U.S. Army.

Consequently, a specialist will spend time preparing fire support situation plans and maps, building status charts, capability overlays, and target lists.

Additionally, Army Joint Fire Support Specialists may spend time training subordinates during downtime.

There is also a need to maintain vehicles, generators, and artillery during downtime.

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What does an Army Fire Support Specialist make?

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The skills you learn as MOS 13F crossover to a number of civilian careers are leaving the U.S. Armed Forces. Image: Flickr

The U.S. Army does not determine pay based on your Military Occupation Specialty (MOS).

Instead, pay is factored based on 1) Army rank, and 2) years of service.

Here is a general idea of what you might expect to earn based on Army rank:

InsigniaPay GradeRankAbbreviationMinimum Monthly Pay
E-1 +4 monthsPrivatePVT$1,917.60
E-2Private Second ClassPV2$2,149.20
army e 3 insignia - pfcE-3Private First ClassPFC$2,259.90
army e 4 insignia - specialistE-4SpecialistSPC$2,503.50
army e 4 insignia - corporalE-4CorporalCPL$2,503.50
e-6E-6Staff SergeantSSG$2,980.50
E-7Sergeant First Class SFC$3,445.80
army master sergeant iconE-8Master SergeantMSG$4,957.20
E-8First Sergeant 1SG$4,957.20
E-9Sergeant MajorSGM$6,055.50
E-9Command Sergeant MajorCSM$6,055.50
e 9 sergeant major of the army insigniaE-9Sergeant Major of the ArmySMA$6,055.50


Even though some complain that the U.S. Military does not pay great, the number of benefits is excellent:

  • Medical Insurance
  • Retirement
  • Vacation Time (PTO)
  • Special Pay
  • Education: Army members can earn full tuition, merit-based scholarships, allowances for books and fees, plus an annual stipend for living expenses.
  • Housing: Allowances for living expenses, utilities, and maintenance.
  • Food: Allowance for the on-base dining hall and access to tax-free department and grocery stores

Job Reviews

The job reviews on and are largely positive related to Army Joint Fire Support Specialist (MOS 13F).

Another poster summarized it very well:

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Civilian Job Opportunities

There is no direct civilian career equivalent of an Army Joint Fire Support Specialist (MOS 13F).

However, many of the leadership skills and team-building exercises you complete in the military serve well in any chosen career path.


Army Joint Fire Support Specialists (MOS 13F) are critical to on-the-field combat operations.

The most important duty of MOS 13F forward observers is to gather intelligence and locate enemy targets.


Zach B.

General FAQ

What is a 13F MOS in the Army?

Joint Fire Support Specialists (MOS 13F) gather intelligence for the U.S. Army and its artillery teams, establish communications systems and decode messages.

Does MOS 13F require security clearance?

Joint Fire Support Specialists (MOS 13F) initially require two levels of security clearances: Confidential level during training and an upgrade to Secret to advance.

How long is AIT for MOS 13F?

Advanced Individual Training (AIT) for MOS 13F lasts 11 weeks, with time spent in the classroom and in field with on-the-job training. It's currently conducted at Ft. Sill, OK.

What ASVAB scores are required to become an MOS 13F in the Army?

To qualify as a Joint Fire Support Specialist (13F), you'll need to score a minimum of 96 on the Field Artillery (FA) portion of the ASVAB test.

What can I do after the army as a 13F?

Skills learned as a 13F can apply to jobs in computer and communications technology. Several tech companies have paired with the Army PaYS program to hire 13F specialists.

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