California PPO license number (PPO# 120370)

3700 Delta Fair Blvd
Suite 202A, Antioch, CA 94509

1900 W Garvey Ave S

Suite 160, West Covina, CA 91790

Exchange Plaza, 1845 Business Center Drive

Suite 101, San Bernardino, CA 92408

3307 Watt Ave

Unit 3, Sacramento, CA 95821

Our Services

Brosnan Security provides security services and guards in California. Brosnan is full-service investigative, protective and intelligence firm to a global network of clients. Headquartered in New York City, with branch locations in multiple states, Brosnan is one of the largest privately held providers of technology-driven security services. With more than 500 years of law enforcement experience, Brosnan understands the law, and more importantly, law breakers. We protect your people, property and assets for aggressive risk mitigation strategies and technologies. Brosnan is a technology-driven best-in-class security provider.

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The Leader in Security Services