Army Fire Control Repairer 91G Career – Military Occupational Specialties (MOS)

Job Description

The fire control repairer is primarily responsible for supervising and performing maintenance on combat vehicles, and infantry and artillery fire control systems and equipment.

Today, fire control is a precise science with advanced technology that enables our big guns to locate and hit targets with systems like laser ranging that give our tanks first shot kill capability.  For this, the army will train you to diagnose and repair instruments such as the long-range advanced scout surveillance system or a hand-held laser rangefinder that provides real-time ability to detect recognize identify and GEO locate distant targets.  These fire control systems like something from the future are here now and the army is using them.

It’s you who will keep them firing on target. You’ll train in the principals of laser rangefinder and in keeping the laser range finders in proper working order by testing, inspecting and repairing them you’ll train as well to read equipment schematics and use their test sets to diagnose any problems.

After your initial entry training and advanced individual training, you may work day or night wherever your skills are needed to support the army’s battlefield mission in a rear area shop or indirect support a forward area combat unit diagnosing and repairing items like laser rangefinders, fire control devices on howitzers thermal tank sites and infrared observation devices.

This equipment is the newest and best in the Army’s inventory and represents major accomplishments in a variety of scientific fields.  Serving in this MOS can help you transition from the military to the civilian employment sector.  Because your skills and leadership teamwork and problem-solving our skills and values in demand by civilian employers, this MOS is one of the most challenging in the army because you keep our critical fire control systems ready for combat.

Job Duties

  • Maintain and repair commander’s weapon station/auxiliary sights, aiming circles, image transfer assemblies, quadrants, mount assemblies and fire control support equipment
  • Maintain and repair laser range finders, ballistic computers, laser observation devices, thermal imaging systems and telescopes
  • Perform battlefield damage assessment and repair


Those who want to serve must first take the Armed Services Vocational Aptitude Battery, a series of tests that helps you better understand your strengths and identify which Army jobs are best for you.


Job training for a fire control repairer requires 10 weeks of Basic Combat Training and 19 weeks of Advanced Individual Training with on-the-job instructions. Part of this time is spent in the classroom and part in the field.

Some of the skills you’ll learn are:

  • Electronic and mechanical principles and concepts
  • Operation of electronic, electrical and mechanical test equipment
  • Understanding schematics, drawings, blueprints and wiring diagrams
  • Operation, testing and maintenance of specific types of weapons systems
  • Operation and maintenance of fire control systems on ships

Helpful Skills

  • Aptitude in science and math
  • Interest in electronic or electrical equipment
  • High attention to detail
  • Interest in working with weapons

Required ASVAB Score(s)

Electronics (EL) : 98
Electronics (EL) : 93, General Technical (GT) : 88