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At Protos Security we believe in a modern security experience that never settles and dynamically adapts to the evolving needs of businesses. Traditional security models fail to keep pace with today’s risks leaving gaps in coverage, transparency and accountability. That’s why we do things differently. Our Protos Promise delivers unmatched end-to-end security solutions that prioritize proactive protection, real-time visibility and relentless customer advocacy. Whether it’s guarding, off-duty, specialized or remote services, we seamlessly integrate technology and expertise to safeguard your operations. We don’t just fill security needs, we ensure optimal performance through integrity and accountability. With real-time transparency, custom reporting and actual-time billing, our clients always know what’s happening in their security program. By leveraging thousands of local owner/operator security vendors nationwide, plus the largest off-duty law enforcement network, we provide scalable, flexible coverage tailored to unique challenges. Our technology-driven approach enhances staffing, training and incident response, reducing risk and improving efficiency. At Protos we challenge the status quo. We are security that never settles.

Website http://www.protossecurity.com
Revenue $41 million
Employees 526 (233 on RocketReach)
Founded 2006
Address 383 Main Avenue Suite 505, Norwalk, Connecticut 06851, US
Phone (203) 941-4700
Fax (540) 966-6209
Technologies
Industry Security and Investigations, Security Products & Services, Security, Nationwide Security Guard Management, Business Services, Privacy and Security, Permanent, Temporary, and Emergency Guard Services, Time & Attendance, Real-Time Incident Reports, Risk Mitigation, Quality Assurance, Accurate Billing, Reducing Guard Budgets
Web Rank 952875
Web Visits 111670
Keywords Security Services, Security Guard Services, Private Security, Protective Services, Security Personnel, Security Solutions, Physical Security, Security Systems, Security Technology, Loss Prevention, Access Control, Security Consulting, Emergency Response, Risk Management, Surveillance, Executive Protection, Threat Assessment, Investigations, Cybersecurity
Competitors ADT, U.S. Security Associates, Inc., Securitas Group, G4S, Vector Security, Allied Universal, Securitech Group Inc., Imperial Security, Vigilant Business Software, UT Global Services Limited +24 more (view full list)
SIC SIC Code 73 Companies, SIC Code 738 Companies
NAICS NAICS Code 56 Companies, NAICS Code 561 Companies

Protos Security Questions

The Protos Security annual revenue was $41 million in 2026.

Mark Hjelle is the CEO of Protos Security.

233 people are employed at Protos Security.

Protos Security is based in Norwalk, Connecticut.

The NAICS codes for Protos Security are [56, 561].

The SIC codes for Protos Security are [73, 738].

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