Best Security Guards Companies in Concord, California

Hammer Head Security is a California firm offering armed and unarmed guard services, vehicle patrols, event protection, remote camera monitoring, mobile patrols, fire‑watch, and executive protection. It provides guard‑card, use‑of‑force, firearms, and first‑aid training. Service areas include Stockton, Sacramento, Bay Area, San Jose, San Francisco, and Concord, using surveillance and reporting tools.

Guardian Security Agency, a California‑licensed PPO #11106 firm, offers on‑site and patrol security for commercial, residential, construction and specialized sites. Established in 1992, it leverages over 40 years of combined experience, a dedicated training coordinator, low no‑show rates, and detailed incident reporting to ensure reliable protection peace of mind and safety.

Sentry Security offers mobile patrol, commercial, and construction security across the Bay Area. Founder Ryan Ohm brings two decades of industry experience. Clients note communication, nightly reports, and coordination with police. The site features a blog on parking‑lot safety, visitor‑management, and 2026 tech trends, plus career listings with advancement incentives.

Professional security solutions for events and businesses. Our trained officers provide comprehensive protection services for all your security needs.

20+ Years Experience   |   24/7 Dispatch   |   Supervisor Oversight   |   Technology-Enabled Reporting GSG Protective Services Covers Your Community GSG Protective Services is a full-service provider of premium security services specializing in physical security, protective services, and security technology. GSG understands that safety needs may be unique in each situation and we

Professional private security services in San Francisco greater Bay Area, Sacramento & Roseville including foot patrol, event security, asset protection, and fire watch. Reliable, licensed, and ready to protect your property.

Founded in 2019, AMPM Security Specialist provides security in the San Francisco Bay Area. Services include uniformed patrols, loss‑prevention, residential and event protection, and video surveillance. The firm emphasizes vetting, training, $1 million liability coverage, and values of honesty, integrity and trust. Its blog covers risk management, public safety and security trends.

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ELITE SECURITY GROUP INC.