About Sentinel Offender Services
Sentinel Offender Services is a Government & Social Sector company based in Irvine (United States) founded in 1993 by Robert Contestabile, and was acquired by Allied Universal in July 2026. Sentinel Offender Services is engaged in providing electronic monitoring solutions. It operates on a Managed Services and Subscription Services model. Sentinel Offender Services has raised $9.5 million across 3 funding rounds from investors including Allied Universal, Opus Bank and Bison Capital. Its chief executive is Robert Contestabile. Its website sentineladvantage.com draws about 11 thousand monthly visits. Sentinel Offender Services offers products and services including OM500 GPS Tracking Device, SCRAM CAM, SentinelDNA Mobile App, RF Patrol, and Breath Alcohol Real-Time Testing. Its focus areas include Technology, Security Technology and Electronic Monitoring. Its competitors include Geosatis, Detection Innovation Group, Outreach Smartphone Monitoring, Saadian Technologies and Kids Live Safe and 4 more; 2 of its 9 listed competitors have raised funding.
Company details
Sentinel Offender Services is involved in delivering electronic monitoring and offender management solutions. The company operates within the criminal justice sector, offering products like GPS tracking devices, alcohol monitoring systems, and mobile applications. Services provided include case management, substance abuse screening, and 247 monitoring capabilities. Their solutions are designed to support community-based programs, enhance participant supervision, and reduce recidivism through evidence-based approaches. Sentinel serves agencies across the United States, focusing on improving outcomes for participants and communities.
- Headquarters Irvine, United States
- Founders Robert Contestabile
- Stage Acquired
- SectorsGovernment & Social Sector
- Phone•••• ••••
- Website sentineladvantage.com
- Social LinkedIn YouTube
- Acquired by Allied Universal (Jul 2026)
- Legal Name Sentinel Offender Services
- Total Equity Funding$9.5M (USD)
in 3 rounds
- Latest Funding Round$9.5M (USD), Series A
Apr 2022
- InvestorsAllied Universal
& 2 more
- Acquired byAllied Universal
(Jul 2026)
Products & Services of Sentinel Offender Services
Sentinel Offender Services offers a comprehensive portfolio of products and services, including OM500 GPS Tracking Device, SCRAM CAM, SentinelDNA Mobile App, RF Patrol, and Breath Alcohol Real-Time Testing.
A device used for tracking participant movement in communities.
A device used for continuous transdermal alcohol monitoring.
An app used for field supervision and communication.
A system used for reliable radio frequency home monitoring.
Equipment used for portable breath alcohol monitoring accuracy.
Apps and channels of Sentinel Offender Services
its YouTube channel Sentinel Offender Services has 36 subscribers and 3 videos.
Videos from Sentinel Offender Services
The most watched videos on Sentinel Offender Services's YouTube channel, Sentinel Offender Services (36 subscribers). Click a video to play it here.
More on Sentinel Offender Services.
Funding Insights of Sentinel Offender Services
Sentinel Offender Services has successfully raised a total of $9.5M across 3 strategic funding rounds. The most recent funding activity was a Series A round of $9.5 million completed in April 2022. This substantial capital infusion reflects strong investor confidence in the company's business model, growth potential, and market opportunities. The funding enables strategic expansion, product development, market penetration, and operational scaling to drive long-term value creation and competitive advantage.
- Total Funding $9.5M
- Total Rounds 3
- Last Round Series A — $9.5M
- Investors Count 2
All 3 funding rounds of Sentinel Offender Services with amounts and investors; the two latest post-money valuations are shown, the rest are part of the premium plan.
| Date | Amount | Transaction Name | Valuation | Lead Investors | Investors |
|---|---|---|---|---|---|
| Apr 2022 | $9.5M | Series A | – | – | – |
| Oct 2012 | – | Debt – Conventional | – | – | |
| Aug 2006 | – | Debt – Conventional | – | – | – |
3 investors in total: 3 institutional.
Investors in Sentinel Offender Services
Sentinel Offender Services has secured backing from 3 investors, including venture fund and institutional investors. Prominent investors backing the company include Allied Universal, Opus Bank and Bison Capital.
| Investor | Description | Founded Year | Domain | Location |
|---|---|---|---|---|
Buyouts are targeted through private equity investments by the firm. | 2001 | bisoncapital.com | Santa Monica, United States | |
Commercial bank | 2010 | opusbank.com | Irvine, United States | |
Security and management services are provided to enterprises. | 2016 | aus.com | United States |
Investor details for Sentinel Offender Services
The complete investor list, round-by-round participation and investor portfolios require an active premium plan.
- Complete investor list
- Round participation
- Investor portfolios
- Co-investor network
Verified entity values are shown only after access is granted.
People of Sentinel Offender Services
2 people are tracked at Sentinel Offender Services (1 in leadership, 1 in team).
| Name | Role | Group |
|---|---|---|
Robert Contestabile | Founder & CEO | Leadership |
Melissa Starr | SVP, Field Operations | Team |
Complete people profiles for Sentinel Offender Services
Full employee and board profiles, team structure, tenure and professional contact details require an active premium plan.
- Full employee list
- Team structure
- Board tenure
- Professional contacts
Verified entity values are shown only after access is granted.
Timeline of Sentinel Offender Services
4 dated milestones of Sentinel Offender Services across 33 years, from founding to its latest funding, stage changes and deals.
- Founded Sentinel Offender Services is founded.
- Funding First funding round.
- Funding Latest funding round, Series A, of $9.5M.
- Exit Acquired by Allied Universal.
Competitors of Sentinel Offender Services
Sentinel Offender Services has 9 listed competitors in our database, 2 of them funded. They include Geosatis, Detection Innovation Group, Outreach Smartphone Monitoring, Saadian Technologies and Kids Live Safe, among others.
| Company Name | Domain | Founded | HQ Location | Total funding | Employees | Description |
|---|---|---|---|---|---|---|
| geo-satis.com | 2011 | Le Noirmont, Switzerland | $4.08M | – | GPS-based bracelets are provided for monitoring law offenders. | |
| detectioninnovationgroup.com | 2018 | United States | $8.37M | – | A public safety platform for offender tracking is provided. | |
| osmnow.com | 2014 | Montrose, United States | – | – | Provides comprehensive smartphone monitoring solutions for police departments. | |
| saadian.com | 2000 | Dublin, Ireland | – | – | Software solutions for offender management are provided to authorities. | |
| kidslivesafe.com | 2009 | Santa Barbara, United States | – | – | Functions as an online tool for protecting children and ensuring their safety. | |
| upstreem.co | 2017 | Charleroi, Belgium | – | 2 | Provider of a wearable offender monitoring system | |
| isecuretrac.com | 1983 | Omaha, United States | – | – | Provides electronic monitoring and compliance systems for correctional agencies. | |
| watchsystems.com | 1999 | Covington, United States | – | – | Offers software and apps for tracking sex offenders and public safety notifications. | |
| barcaent.com | 2008 | Tampa, United States | – | – | Provides a system for managing offender registration efficiently. |
Detailed competitors of Sentinel Offender Services
The full competitor set, operating metrics and side-by-side benchmarks require an active premium plan.
- Full competitor set
- Operating metrics
- Benchmarks
- Competitive positioning
Verified entity values are shown only after access is granted.
Web traffic of Sentinel Offender Services
The website of Sentinel Offender Services (sentineladvantage.com) receives about 11.1K visits a month.
- Monthly visits11.1K
▼ 61.9% vs previous month
Websites whose visitors overlap most with Sentinel Offender Services. Affinity shows how closely the audiences match.
| Website | Domain | Audience affinity | Monthly visits | Global rank | Profile |
|---|---|---|---|---|---|
eocamerica.com | eocamerica.com | 100% | – | #3,517,376 | – |
Top companies in GovTech
10 companies that operate in the same segment as Sentinel Offender Services (GovTech), ranked by their profile score on The Company Check.
| Company | Description | Founded | Location | Total funding | Revenue | Employees |
|---|---|---|---|---|---|---|
Axon is focused on developing public safety technology solutions. | 1993 | Scottsdale, Arizona, United States | – | USD 2.78 B | 4,100 | |
Administrative tools and civic engagement platforms are provided to governments. | 1999 | San Ramon, California, United States | USD 235.62 M | – | – | |
Cloud-based software for visualizing municipal financial data is provided. | 2012 | Redwood City, California, United States | USD 182.12 M | USD 2.39 M | 90 | |
A platform for connecting homeowners with local service professionals is operated. | 2011 | Kansas City, Missouri, United States | USD 30.55 M | – | – | |
Provider of digital signature certificates, PKI, and e-signature solutions | 2008 | Bengaluru, Karnataka, India | USD 26.23 M | USD 74.82 M | 851 | |
Online emergency communication and response system | 2012 | New York, New York, United States | USD 507.54 M | – | 323 | |
Public safety is managed via cloud-based vehicle surveillance systems. | 2017 | Atlanta, Georgia, United States | USD 657.58 M | – | 1,443 | |
AI-based solutions for government decision-making are provided using citizen feedback. | 2014 | Tel Aviv, Israel | USD 94.7 M | – | – | |
A mobile-based payment platform is provided for government agencies. | 2013 | Kansas City, Missouri, United States | USD 271.85 M | – | – | |
Website development, HR management, and emergency notification systems for government agencies | 1998 | Manhattan, New York, United States | USD 456.29 M | – | – |
Unlock complete access to The Company Check
Get unrestricted viewing across everything we track — from companies and brands to investors, funding rounds, acquisitions, financials, and more.
- Unlimited viewing on all profiles Companies, investors, financials, funding, acquisitions & directors
- Full access to every database India & global coverage, advanced filters and rich profile details
- Always-on access from your team account Single premium plan for everything you see on the portal
Related news about Sentinel Offender Services
Complete news archive for Sentinel Offender Services
Full article history, source details, and older brand coverage require an active premium plan.
- Full article archive
- Source and publication date
- Older coverage
- Brand-specific news history
Verified entity values are shown only after access is granted.
Frequently Asked Questions about Sentinel Offender Services
Sentinel Offender Services was founded in 1993 and raised its 1st funding round 13 years after it was founded.
Sentinel Offender Services is headquartered in Irvine, United States. It is registered at Irvine, California, United States.
Robert Contestabile is the current CEO of Sentinel Offender Services. They have also founded this company.
Sentinel Offender Services is a funded company, having raised a total of $9.5M across 3 funding rounds to date.
Sentinel Offender Services is involved in delivering electronic monitoring and offender management solutions. The company operates within the criminal justice sector, offering products like GPS tracking devices, alcohol monitoring systems, and mobile applications. Services provided include case management, substance abuse screening, and 247 monitoring capabilities. Their solutions are designed to support community-based programs, enhance participant supervision, and reduce recidivism through evidence-based approaches. Sentinel serves agencies across the United States, focusing on improving outcomes for participants and communities.
Sentinel Offender Services's top competitors include Geosatis, Detection Innovation Group and Upstreem.
Sentinel Offender Services offers OM500 GPS Tracking Device, SCRAM CAM, SentinelDNA Mobile App, RF Patrol, and Breath Alcohol Real-Time Testing.
Sentinel Offender Services has 3 investors. Key investors include Allied Universal, Opus Bank, and Bison Capital.
Sentinel Offender Services operates through Sentinel Offender Services.
Yes. Sentinel Offender Services was acquired by Allied Universal in July 2026.