Job Facts About Signal Support Systems Specialist (25U)

These Army Specialists Handle Communications

Air Force Officers in Missile Silo
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Signal support systems specialists in the Army do what the job title suggests: They're responsible for battlefield signal support systems and terminal devices. Signal support specialists are part of the Army Signal Corps (USASC), which handles communications and information systems support for the combined armed forces. 

History of the USASC

The USASC was established in 1860, and has played a role in all major military campaigns since the Civil War.

It helped build the American telegraph system along the western frontier in the late 1800s. The signal corps are responsible for some of the biggest advances in radio signal technology, including the 1946 Project Diana, which successfully bounced radar signals off the moon for the first time.

The USASC used to have oversight of a much larger array of functions, such as weather forecasting, aviation and military intelligence, but the modern-day USASC has a much more specific focus. 

Duties of MOS 25U

Obviously in a combat situation the jobs within the USASC are especially crucial in order to detect enemy signals, and jam enemy radio transmissions, but in any scenario where large numbers of troops are moving, the signal support systems specialists are important to keeping everyone in contact.  The military operational specialty code for this job is MOS 25U.

The job involves performing signal support functions and technical assistance for computer systems, providing technical assistance for local area networks, and doing maintenance on equipment, terminal devices, power generators and vehicles.


Recruits who want to work as an MOS 25U must first take the Armed Services Vocational Aptitude Battery (ASVAB), a series of tests that identifies the test taker's strengths. In order to qualify for MOS 25U, applicants will need a surveillance and communications (SC) score of 92 and an electronics score of 93.


Job Training for MOS 25U

In order to qualify to be a signal support systems specialist, recruits first need to complete 10 weeks of basic combat training and 16 weeks of advanced individual training with on-the-job instruction. They'll divide this time between the classroom and the field, and will receive the training at Fort Gordon, Georiga from the 369th Signal Battalion.

During training, these soldiers will learn mechanical and electrical principles, preventive and maintenance procedures, communication security policies and procedures, and line installation and wiring techniques. 

Skills Needed for MOS 25U

Having interest or knowledge of working with electronic equipment and problem-solving skills are important for applicants to this job. Normal color vision (no color-blindness) is required, and recruits must be U.S. citizens. 

Soldiers in the 25U MOS work with all manner of electronic devices, including communications equipment, vehicles, radio and wire systems and power generators. Good problem-solving skills and an interest in electronics are necessary traits for those soldiers pursuing the MOS 25U job.


This job is good preparation for a post-military career as an electronics technician. 

Similar Civilian Occupations

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  • Radio Mechanics
  • Radio Operators
  • Telecommunications Equipment Installers and Repairers, Except Line Installers
  • Telecommunications Line Installers and Repairers

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