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Army MOS · Intelligence

351L Counter-Intelligence Technician

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

A Counter-Intelligence Technician investigates personnel for suitability for sensitive duties, conducts interrogations and debriefings, and prepares intelligence and investigative reports. The technician analyzes counterintelligence data, collects evidence, coordinates with law enforcement and investigative agencies, and conducts security investigations, surveys, and vulnerability studies.

Minimum clearance: TS/SCI

Core Skills

  • Personnel suitability investigations for sensitive assignments
  • Legally admissible evidence collection and depositions
  • Installation security surveys and vulnerability studies
  • Investigative liaison with foreign government agencies

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Private Detectives and Investigators

Personnel suitability investigations, evidence collection, surveillance, and investigative reporting transfer directly to private investigative work.

How to prepare: Compile a record of your investigative assignments and experience for comparison with your intended state and locality's licensing criteria. Entry typically involves at least a high school diploma or equivalent and several years of related experience; most states require licensing, with age, experience, and other conditions set by jurisdiction.

What the civilian work involves
  • Write reports or case summaries to document investigations.
  • Search computer databases, credit reports, public records, tax or legal filings, or other resources to locate persons or to compile information for investigations.
  • Conduct personal background investigations, such as pre-employment checks, to obtain information about an individual's character, financial status, or personal history.
Civilian tools and software (examples)
  • Microsoft Word
  • Microsoft Excel

DIA Analysis Officer

Analysis of intelligence and counterintelligence data, knowledge of foreign intelligence organizations, and preparation of intelligence reports support DIA analytical work.

How to prepare: Practice a timed analytical writing sample using public information to prepare for DIA's writing test and panel interview. DIA accepts varied educational backgrounds, but hiring requires U.S. citizenship, a granted security clearance, background inquiry, drug screening, and any required medical examinations and counterintelligence-scope polygraph.

Security Management Specialists

Installation security investigations, surveys, and vulnerability studies transfer to assessing physical security threats and recommending countermeasures.

How to prepare: Develop a sample civilian facility assessment that links identified vulnerabilities to prioritized security improvements.

What the civilian work involves
  • Assess the nature and level of physical security threats so that the scope of the problem can be determined.
  • Recommend improvements in security systems or procedures.
  • Perform risk analyses so that appropriate countermeasures can be developed.
Civilian tools and software (examples)
  • Microsoft Excel
  • Microsoft PowerPoint

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Getting Started

  • Associate Protection Professional (APP)

    Structure preparation in civilian security fundamentals, business operations, risk management, and response management.

    Eligibility and preparation: At least one year of compensated security experience, potentially reduced to six months with an approved related certification; applicants must have been employed full time in a security-related role, though current employment is not required.

    For: Security Management Specialists

Career Growth

  • Physical Security Professional (PSP)

    Support progression in physical security assessment after accumulating qualifying experience.

    Eligibility and preparation: Physical security experience: five years without a higher education degree, or four with APP; four years with a bachelor's degree, or three with APP; three years with a master's degree. Degrees must be from accredited institutions or international equivalents, and experience must involve personal engagement in security or loss prevention full time or as a primary duty.

    For: Security Management Specialists

Notes & Sources

Evidence for this guidance (9 documents)
  1. Army COOL MOC feed: 351L Counter-Intelligence Technician

    [1] data/authority/army-codes.json entry 351L (OSD COOL feed, fetched 2026-07-25); DB rank warrant_officer, authority codeType warrant_officer

    Supports: Personnel suitability investigations for sensitive assignments, Legally admissible evidence collection and depositions, Installation security surveys and vulnerability studies, Investigative liaison with foreign government agencies, Private Detectives and Investigators (O*NET 33-9021.00), DIA Analysis Officer, Security Management Specialists (O*NET 13-1199.07)

  2. O*NET: Private Detectives and Investigators

    [2] O*NET 30.3 occupational data

    Supports: Private Detectives and Investigators (O*NET 33-9021.00)

  3. Bureau of Labor Statistics: Private Detectives and Investigators

    [3] How to Become a Private Detective or Investigator; Work Experience in a Related Occupation; Licenses, Certifications, and Registrations; page dated 2026-08-27, retrieved 2026-09-23

    Supports: Private Detectives and Investigators (O*NET 33-9021.00)

  4. Defense Intelligence Agency: Analysis Career Field

    [4] Career Specifics, Military Capabilities, Applying to Be an Analyst; public page retrieved through Jina Reader 2026-09-23

    Supports: DIA Analysis Officer

  5. Defense Intelligence Agency: Hiring Process

    [5] Opening hiring overview and Employment Criteria, Initial Employment; public page retrieved through Jina Reader 2026-09-23

    Supports: DIA Analysis Officer

  6. O*NET: Security Management Specialists

    [6] O*NET 30.3 occupational data

    Supports: Security Management Specialists (O*NET 13-1199.07)

  7. COOL credential mapping: Associate Protection Professional (APP)

    [7] 351L cached COOL credential feed

    Supports: Associate Protection Professional (APP)

  8. ASIS International Board Certification Handbook, updated 4 August 2026

    [8] Page 10, APP Board Certification in Security Fundamentals; page 8, eligibility requirements and preparation recommendation (separate passages)

    Supports: Associate Protection Professional (APP)

    [10] Page 30, PSP Eligibility Requirements; page 8, experience definition

    Supports: Physical Security Professional (PSP)

  9. COOL credential mapping: Physical Security Professional (PSP)

    [9] 351L cached COOL credential feed

    Supports: Physical Security Professional (PSP)

Defense contractor jobs for 351L

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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