On Q Protection and Investigation Services (ONQPI) is a licensed Illinois Private Detective Agency, founded by former United States Department of Homeland Security-ICE Agent, Tony Quintana, who realized the need for professional and technical expertise in the field of private protection and investigation in Chicago.

ONQPI Investigators have many years of former law enforcement experience in Local, County, State and Federal government and are licensed by the State of Illinois. Their skill-sets range from executive protection, criminal investigation and fugitive apprehensions, nationally and internationally.

ONQPI Investigators possess superior intelligence-gathering abilities and have a vast network of skilled, experienced and highly-vetted resources – locally, nationally and internationally – to gather any type of information from trustworthy sources in a timely manner.

No longer is it acceptable for companies to settle for less than the absolute highest standards of quality when it comes to uncovering the truth and protecting their assets. We service the Chicagoland area and surrounding municipalities as well as National and International clients. We strive for 100% client satisfaction by providing you with involved, focused and trained personnel.

We specialize in the following Investigative Services:

•Accident
•Accidental Deaths
•Accounting Fraud
•Adoption Tracing
•Adultery Investigation
•Alarm Systems
•Arson
•Asset Searches
•Background Searches
•Bank Fraud
•Bodyguards
•Burglar Alarms
•Child Abductions
•Child Custody
•Child Kidnappings
•Child Locators
•Child Support
•Child Welfare
•Children’s Rights
•Civil
•Closed Circuit Television
•Cold Case Homicides
•Computer Crimes
•Computer Forensics
•Computer Fraud
•Computer Security
•Copyright/Trademark Infringement
•Corporate
•Corporate Security
•Court Records Research
•Criminal Defense
•Criminal Prosecution
•Crowd Management
•Custody Services
•Database Searches
•Debugging
•Decoy Services
•Digital A/V Evidence
•Digital Audio Evidence
•Divorce Asset
•Divorce Evidence
•Domestic
•Due Diligence
•Electronic Surveillance/Countermeasures
•Electronic Sweeps
•Embezzlement
•Event Planning/Safety
•Event Security
•Executive Protection
•Expert Witnesses
•Financial Fraud
•Firearms
•Forensic
•Fraud
•General Investigations
•GPS Vehicle Tracking
•Guard & Patrol Services
•Heath Care Facility Deaths
•Hidden Cameras
•Home Security
•Identity Theft
•Industrial Accident
•Industrial Espionage
•Infidelity
•Insurance Fraud
•Loss Prevention
•Missing Persons
•People Searches
•Polygraph Tests
•Pre-Employment Screening
•Pre-Tenancy Screening
•Process Service
•Records Research
•Skip Tracing
•Spousal Surveillance
•Surveillance
•Undercover
•Video Depositions
•Witness Locating
•Workers' Compensation

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