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Internal Affairs Investigator

County of Los Angeles Probation Department
Downey, CA Full Time
POSTED ON 1/23/2026 CLOSED ON 2/17/2026

What are the responsibilities and job description for the Internal Affairs Investigator position at County of Los Angeles Probation Department?

About the Role

Join the Los Angeles County Probation Department as an Internal Affairs Investigator to conduct complex and sensitive criminal and administrative investigations related to staff, contractors, and clients. Duties include surveillance, interviews, arrests, evidence analysis, and preparing reports for disciplinary action or criminal prosecution.


Key Responsibilities

  • Conduct confidential investigations into misconduct or legal violations
  • Prepare affidavits, warrants, subpoenas, and investigative reports
  • Coordinate with law enforcement and legal entities
  • Make arrests and conduct searches
  • Testify in hearings and court proceedings


Minimum Requirements

  • Education: Bachelor’s degree from an accredited institution
  • Experience (choose one):
  • our (4) years of experience conducting criminal or administrative** investigations as a peace officer***, three (3) years of which must have been at the level of Assistant Probation Director**** or as an Investigator, Detective, or Agent with a state, county, or local law enforcement, corrections, or community corrections agency.
  • 4 years as a peace officer conducting investigations as a Supervising Deputy Probation Officer in LA County

Additional Requirements:

  • Valid California Class C Driver's License
  • Must meet peace officer standards under California law
  • Physical Class IV – Arduous


Assessment Process

  • Structured Interview (100%)
  • Must score 70% or higher to be placed on the eligible list (valid for 3 months)


How to Apply

INTERNAL AFFAIRS INVESTIGATOR, PROBATION | Job Details tab | Career Pages

Salary : $117,942 - $150,544

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