The best 10 Security Guard Companies near Castro Valley, California - with verified email and phone number owner contact info

American Global Security offers a broad range of guard services—including armed, unarmed, standing, vehicle patrol, and fire‑watch—across California. With over 30 years of experience, the firm provides 24/7 monitoring, real‑time guard tracking, and a free consultation. Client reviews highlight professional, responsive staff and reliable, flexible security solutions for businesses and communities.

ONPATROL, Inc. delivers comprehensive security solutions, including armed and unarmed officers, vehicle patrols, executive protection, event security, and concierge services. Their five‑tier accountability system features electronic guard tours and GPS tracking for real‑time monitoring. The company emphasizes People, Training, Processes, Technology, and Feedback, and serves over 9,000 clients worldwide, ensuring reliable protection.

Bravo Security Services offers a range of security solutions, including armed and unarmed guards, personal protection, firewatch, corporate and retail security, and loss prevention. The company holds a private patrol operator license (#120157) and serves major U.S. cities such as Phoenix, Dallas, Los Angeles, and San Francisco, providing reliable, licensed protection for businesses and communities.

All About Security Agency, established in 1996, offers comprehensive security solutions across Northern California, including campus, commercial, corporate, residential, retail, and special‑event protection. Services feature static guards, vehicle patrols, executive protection, permit enforcement, and community security. The firm employs advanced dispatch technology and rigorous incident‑reporting protocols for clients today.

CME Security Services offers licensed, 24/7 security solutions across the San Francisco Bay Area, including unarmed, armed, mobile patrol, event, fire‑watch, foot patrol, and integrated systems. Their multicultural team emphasizes community engagement, and client reviews highlight professionalism, responsiveness, and reliable protection for commercial, residential, and event settings throughout the region.

Guard Enforcement provides integrated security, co‑working, and tech solutions across the USA and Nigeria. With over a decade of experience, the firm serves 300+ clients using AI‑driven surveillance, IoT access control, and 24/7 monitoring. Led by veteran CEO Segun Ayanbajo, it offers licensed, insured protection and modern workspaces for businesses.

Straight Edge Solutions Agency Inc. offers a range of security services, including uniformed guards, mobile patrols, event security, access control systems, executive protection, and specialized solutions. The firm emphasizes experienced, certified personnel, customized plans, and modern technology to address diverse client needs across various industries, ensuring reliable protection and peace of mind.

Barrera Intervention offers a range of security services, including firewatch, mobile patrol, event and on‑site protection, church and residential patrol, retail loss prevention, construction security, and OC‑certified guard training. The firm emphasizes professional, courteous guards and flexible contract options for both short‑ and long‑term needs, serving diverse client industries and private clients.

Garcia's Security Training offers a range of courses for security professionals, including Initial Firearms, Power to Arrest, Firearms Requalification, Continuous Education, ECD, OC Spray, and First Aid/CPR/AED. The site also provides mobile live‑scan fingerprinting, child fingerprinting, and notary public training, with online and live registration options and an events calendar.

K‑9 Private Security offers Bay Area businesses comprehensive security solutions, including commercial, cannabis, shopping‑center, residential, educational, remote, executive, corporate‑campus, and technology services. With 15+ years experience, the firm provides licensed, trained guards, real‑time monitoring, and customized plans, earning a 5‑star client rating for rapid, reliable response and peace of mind.