About Sentinel Offender Services

Since 1993, Sentinel Offender Services has been a trusted partner of courts, sheriff departments, probation and parole departments, and other law enforcement agencies from across the country. We provide comprehensive case management and offender-management programs.

Sentinel pioneered the community-based offender-funded program model. Program fees are paid for by offenders, saving taxpayers millions of dollars in jail costs.  How does this work? At the time of enrollment, Sentinel staff conducts a detailed financial assessment. The results of that assessment establish a suitable daily program fee. Each participant pays according to the supervising agency’s approved fee schedule and the participant’s ability to pay. This payment structure is available for all the services we offer.

Community-based offender-funded programs operate with oversight from local corrections and law enforcement staff. They strictly follow all applicable laws, rules, and guidelines. Most importantly, the community-based offender-funded programs save money.

Sentinel has delivered products and services in all 50 states and throughout North America. These services include  GPS location tracking, RF house arrest monitoring, domestic violence programs, breath alcohol testing, substance abuse testing and complete day reporting center reentry program management. All Sentinel programs are backed by our in-class 24/7/365 offender monitoring capabilities.

What Sentinel Cannot Do

Sentinel Offender Services does not have the power, authority or responsibility to enforce laws and execute warrants. The government agencies with which we contract have the power, authority, and responsibility for these items.

Sentinel contracts with court systems and other agencies to collects fees, fines or restitution amounts on their behalf.  Any fees collected are passed directly to the contracted party following agreed upon protocol.  As a private services provider to courts, community corrections agencies and law enforcement, Sentinel Offender Services can only carry out agreed upon contractual obligations on behalf of the customers we serve.

Sentinel does not:

  • Issue warrants, citations or fines of any kind;
  • Have the power to arrest or incarcerate any individual;
  • Have capacity, responsibility or authority to enforce laws, penal codes, acts of legislation, court orders or issued warrants;
  • Act as an officer of the court
  • Reflect or represent any political affiliation



Customer-centric, Energetic and Innovative

Consistent Leadership

Our company vision has remained consistent. Robert Contestabile is the founder and owner of Sentinel Offender Services. He has been Sentinel’s CEO and president since 1993.

Experienced Management Team

Sentinel’s senior leadership team offers more than 200 years of combined industry experience. This is a rarity in an industry that simply didn’t exist 30 years ago. That amount of experience gives Sentinel a significant advantage when it comes to addressing the complex problems facing the criminal justice system.

24/7/365 National Monitoring Center

Sentinel provides its customers with live operators 24/7/365 to field incoming calls from our state-of-the-art National Monitoring Center located in our headquarters in Anaheim, California.

Original Equipment Manufacturer

Sentinel manufactures its own products and continually improves products based on customer feedback and market demands.

Criminal Justice Industry Leader

With customers in all 50 states and across North America, Sentinel is a leader in comprehensive community-based offender management solutions. We support all levels of courts, law enforcement, and community corrections agencies.  No vendor offers a wider or more flexible array of offender management solutions.  Products and services include Day Reporting Centers, reentry program management, GPS monitoring, RF monitoring, domestic violence monitoring programsdeep lung alcohol testingsubstance abuse programs and more.

All Sentinel programs are backed by the National Monitoring Center, 24/7/365.

For more information on how Sentinel is positively impacting the efforts of judges, courts and the communities they support, contact Sales@SentinelAdvantage.com or by calling (800) 589-6003.