Army MOS 31D Criminal Investigations Special Agent (CID)

The 31D is a Special Agent with the United States Criminal Investigations Command. 31D Special Agents, are primarily responsible for investigating cases where a felony level crime has been committed. Within the ranks of the Army, they serve as both Soldier and a Criminal Investigator

Job Duties

  • Investigate criminal activities such as espionage, treason, and terrorism
  • Interview witnesses and question suspects
  • Collect/analyze criminal intelligence and provide forensic laboratory support
  • Maintain Army criminal records

31D Qualifications

Those interested in applying to be a CID Agent must meet the following requirements:

  • Be a U.S. Citizen
  • At least 21 years of age
  • Possess a Bachelor’s Degree or higher in one of the following concentrations:
    • Criminal Justice
    • Forensic Science
    • Computer Science
    • Pre-Law
  • Have a 3.0 GPA or higher
  • GT score of 110 or higher
  • ST score of 107 or higher
  • PULHES rating of 111221 or better along with NORMAL Color Vision-no exception to policy authorized.
  • Valid drivers license and a favorable driving record.
  • Favorable credit history.
  • No felony or court martial convictions.
  • No record of lost time or having received less than an honorable discharge.
  • Screened and eligible for a Top Secret clearance.
  • Enlistment pay grade will be SPC for NPS.  PS applicants will be subject to a grade determination waiver
  • No history of mental or emotional disorders.
  • Must have suitable character, integrity, reputation, sobriety, discretion, and stability as established by a Single Scope Background Investigation (SSBI) and other information developed during application processing.

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 criminal investigations special agent requires completing 20 weeks of a resident course, which is designed to train criminal investigation duties in field units for the Army.

Some of the skills you’ll learn are:

  • Civil and military laws
  • Investigation procedures and techniques
  • Crime scene processing
  • Testimonial evidence

About the Author MSG Washington

MSG Washington has served within the ranks of the United States Army since June of 2001. With ten years of recruiting experience, he is an expert on Recruiting Operations, who willingly assists applicants across the Country with their enlistment process.

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