Internal Affairs Investigator, Probation

EXAM NUMBER

F8639A-R

TYPE OF RECRUITMENT

We welcome applications from everyone.

This announcement is being reposted to change the application period to Open Continuous.

Applications may be submitted beginning Monday, January 26, 2026, at 8:00 a.m. (PT) – continuous. We will keep accepting applications until the positions are filled. The application window may close unexpectedly once we have enough qualified candidates.

With more than 10 million residents, Los Angeles County is the most populous county in the nation! As the largest employer in Southern California, over 116,000 employees in more than 38 Departments, we provide vital public services as diverse as law enforcement, property assessment, public health protection, water conservation, cultural activities and many more.

We are dedicated professionals committed to preserving the dignity and integrity of the workplace as well as protecting the rights of each employee. The County has more than 2,300 different job descriptions, offering a lifetime of opportunities and careers! We offer one of the strongest public‑sector benefits packages in the country. Join us and discover a rich selection of health care options, robust retirement plans and the flexibility to work, relax, and rejuvenate to reach your fullest personal and professional potential.

• Conducts complex, confidential, comprehensive, and sensitive criminal and administrative investigations by thoroughly researching alleged misconduct and/or violations of the law.
• Prepares affidavits to present to a court of law and obtains valid arrest/search warrant that will withstand judicial review.
• Prepares or works with County Counsel or prosecuting attorneys to prepare criminal or administrative subpoenas to further investigative efforts.
• Coordinates tactical operations and prepares operational plans to gather facts, evidence, and information supporting an investigation.
• Serves as a liaison with Courts, State, federal, and local law enforcement agencies to further ongoing criminal and administrative investigations.
• Interviews witnesses and interrogates suspects in investigations to identify violations of law and/or policies using industry standard investigative techniques.
• Analyzes written, visual, and/or audio evidence to effectively investigate allegations of misconduct and violations of the law.
• Develops, documents, and utilizes informants in compliance with departmental policy and the law.
• Makes arrests for violations of the law to ensure institutional and public safety using established law enforcement techniques.
• Conducts searches of persons or property to collect evidence and ensure officer safety, utilizing established law enforcement techniques and equipment.
• Conducts covert, physical, mobile, and/or electronic surveillance of suspects in compliance with the law and department policy.
• Responds in person at various hours to conduct investigations in areas under the jurisdiction of the Probation Department.
• Prepares criminal cases for referral to the District Attorney for prosecution.
• Prepares cases for the department for administrative personnel actions.
• Testifies in administrative hearings, civil litigations, and criminal proceedings as a witness regarding investigative findings and conclusions.
• Prepares detailed investigative reports documenting findings, conclusions, and recommendations for disciplinary action or criminal prosecution, if warranted.
• Performs related duties as assigned or as necessitated by emergencies and/or other critical operational needs.

For more information, please  to view the classification specification

A Bachelor’s degree
* from an accredited college or university.

AND

Option I:
Four (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.

At the level of You may still qualify even if your job title isn’t exactly the same as the ones listed above. What matters is that your…