About SentinelArc
SentinelArc was founded by former intelligence operatives and elite offensive security researchers who grew tired of watching organizations lose to threats they could have prevented.
Our Story
SentinelArc was born in 2019 out of frustration. Our founders — former NSA analysts, military cyber operators, and elite red teamers — watched from the inside as critical infrastructure fell to attacks that should have been stopped at the perimeter.
The problem wasn't technology. It was strategy. Most security vendors sell tools and dashboards. SentinelArc sells outcomes. We embed with your organization, understand your crown jewels, model your specific threat landscape, and build a defensive posture that holds.
In six years we've grown from a 4-person boutique to a 120-analyst operation spanning three continents, protecting financial institutions, healthcare networks, defense contractors, and critical energy infrastructure across 34 countries.
Our philosophy is simple: the best defense is a relentless offense. We think like the adversary, because most of us were the adversary — in state-sponsored programs, elite military units, and private sector red teams that tested the world's most hardened systems.
Four former intelligence operatives launch SentinelArc in Washington D.C. with a mandate to bring offensive-grade thinking to enterprise defense.
Retained by a Fortune 100 financial institution following a breach at a competitor. Zero incidents recorded in the following 18 months.
Opened our 24/7 Security Operations Center, expanding from advisory to active monitoring and response for 40+ enterprise clients.
Established analyst hubs in London and Singapore to provide follow-the-sun coverage across all time zones.
120+ analysts. 34 countries. 99.97% threat detection rate. Zero confirmed breaches across our monitored client portfolio.
By The Numbers
Leadership
Former NSA Tailored Access Operations analyst. 14 years in offensive cyber operations before founding SentinelArc.
PhD in Computer Security from MIT. Former DARPA researcher specializing in zero-day vulnerability discovery and exploit development.
10-year veteran of elite military cyber units. Led red team engagements against NATO critical infrastructure and Fortune 50 enterprises.
Former Big 4 cybersecurity auditor with 12 years helping global enterprises achieve and maintain ISO 27001, SOC 2, and HIPAA compliance.
Certifications
Internationally recognized standard for information security management systems.
Independently audited controls for security, availability, and confidentiality.
Globally recognized accreditation for penetration testing and incident response.
Authorized to operate within US federal government cloud environments.
Qualified Security Assessor certified for Payment Card Industry compliance audits.
Recognized among the top 250 Managed Security Service Providers globally for 2025.