Brosnan is the largest privately-held security services company in America

Homeland Security SAFETY Act Seal

Reliable Protection with Brosnan®

For over 25 years, Brosnan has leveraged evolving technologies, manpower and data to reduce organizational risk to clients. Headquartered in New York, and operational in 45 states and over 500 cities. Brosnan deploys its patented Smart Security Solutions so our customers can mitigate issues before they become threats.

Our suite of products and services includes Security Officers, Investigations, Executive Protection, Emergency Response and Disaster Recovery, Fraud Investigations and Forensic Accounting, COVID-19 protection, Comprehensive Risk Consulting, Employee Background Screening, Security Software & Technology and Systems Integration.

The Brosnan Difference


Security Services

Brosnan® Security Officers are highly trained and consistently ranked as the best security guards in the business.

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Technical Services

Physical security measures can be greatly enhanced by digital security technologies. 

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Fraud Investigations and Financial Accounting

Brosnan differentiates itself from the competition through innovative technology solutions combined with a seasoned team of legal, investigative, forensic and intelligence expertise.

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We will develop comprehensive safety and security plans to protect every important element of your business.

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Strategic Response Team (BSRT)

The BSRT program is comprised of elite teams of off-duty or former law enforcement professionals available for rapid deployment.

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Emergency Planning and Disaster Response

Our team can work with you to prepare for — and respond to – any emergency situation.

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Retail Loss Prevention

Our cost-effective, results-driven programs have changed the way companies deploy loss prevention strategies throughout their portfolios.

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Real Estate Security (C2O)

Brosnan secures properties from construction to occupancy (C2O).

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Download The Investigations Brochure

Incidents of fraud can cause major disruption to businesses and have a lasting impact on profit, performance, and reputation. Our fraud investigations are tailored to the needs of the client. Our global teams of experts—with credentials in finance and accounting, intelligence, cyber-crime, law, and law enforcement — are supported by technology and data analysis tools to conduct deep inquiries into questions of large-scale fraud and misconduct. We offer an unmatched depth of experience in highly complex, multijurisdictional fraud investigations. We help clients understand the circumstances, weigh their options for remediation, assess the damage and recover from it, and prevent similar incidents from happening again. 


Download Our Brochure

Our newest brochure defines Brosnan’s corporate philosophy and breaks down our various service lines and programs. Most notably, the brochure clarifies the reason for our Global Security Operations Center (GSOC) and explains the interrelatedness of its three components: the Brosnan Command Center (BCC), Emergency Operations Center (EOC) and Brosnan Intelligence Group (BIG).  Our corporate brochure tells a compelling story of Brosnan Risk Consultants and is a true reflection of our growing business.

Get Started with Brosnan®

People, Equipment and Services for Your Organization's Security Needs