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Marine Corps MOS · Support

5805 Criminal Investigation Officer

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 Criminal Investigation Officer leads a Criminal Investigation Division and manages criminal investigative operations in supporting establishments and deployed or combat contingency environments. This officer provides investigative expertise and coordinates with local, state, and federal law enforcement agencies on behalf of the Provost Marshal.

Minimum clearance: TS/SCI

Core Skills

  • Local, state, and federal investigative coordination
  • Criminal investigative operations in deployed environments

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.

First-Line Supervisors of Police and Detectives

Leading CID operations and providing criminal-investigation expertise directly overlap with supervising investigators and coordinating criminal cases.

How to prepare: Ask a target agency to assess your CID leadership experience against its appointment and supervisory-entry requirements. Most police and detectives complete an agency academy and on-the-job training; education, physical, personal, and citizenship requirements vary, with U.S. citizenship required for federal officers.

What the civilian work involves
  • Supervise and coordinate the investigation of criminal cases, offering guidance and expertise to investigators, and ensuring that procedures are conducted in accordance with laws and regulations.
  • Prepare work schedules and assign duties to subordinates.
Civilian tools and software (examples)
  • Microsoft Office software

Fraud Examiners, Investigators and Analysts

Managing criminal investigative operations provides a foundation for fraud investigations, although the verified duties do not establish financial-investigation specialization.

How to prepare: Complete a financial-investigation course that includes reviewing financial documents and preparing a practice fraud findings report.

What the civilian work involves
  • Gather financial documents related to investigations.
  • Prepare written reports of investigation findings.
  • Document all investigative activities.
Civilian tools and software (examples)
  • Microsoft Excel
  • Microsoft Word

Notes & Sources

Evidence for this guidance (4 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 5805

    [1] MOS 5805 section "a. Summary"; cached text line 15246; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Local, state, and federal investigative coordination, Criminal investigative operations in deployed environments, First-Line Supervisors of Police and Detectives (O*NET 33-1012.00), Fraud Examiners, Investigators and Analysts (O*NET 13-2099.04)

    [2]NAVMC 1200.1L MOS 5805: Related SOC titles · MOS 5805 section "e. Related Standard Occupational Classification"

    Supports: First-Line Supervisors of Police and Detectives (O*NET 33-1012.00)

  2. O*NET: First-Line Supervisors of Police and Detectives

    [3] O*NET 30.3 occupational data

    Supports: First-Line Supervisors of Police and Detectives (O*NET 33-1012.00)

  3. Bureau of Labor Statistics: Police and Detectives

    [4] How to Become, Education, Training and Other Experience; checked September 24, 2026

    Supports: First-Line Supervisors of Police and Detectives (O*NET 33-1012.00)

  4. O*NET: Fraud Examiners, Investigators and Analysts

    [5] O*NET 30.3 occupational data

    Supports: Fraud Examiners, Investigators and Analysts (O*NET 13-2099.04)

Defense contractor jobs for 5805

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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