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

OnPatrol, Inc. delivers security services built on people, training, processes, technology, and feedback. Offerings include vehicle patrol, executive protection, event security, off‑duty police, armed and unarmed officers, and concierge staffing. Their accountability system uses electronic guard tours and GPS tracking. A four‑step workflow—assess, build, protect, support—serves over 9,000 clients globally.

American Global Security is a leading security guard company in San Francisco Bay Area, CA. Our security guard services keep your building and homes safe.

Bravo Security Services is a verified Guardist vendor offering 24/7 security solutions. Services include armed and unarmed guards, healthcare facility protection, personal and executive protection, firewatch, corporate, loss prevention, and retail security. Holds a private patrol operator license (#120157) and provides instant quote requests through the marketplace for clients nationwide.

All About Security Agency, founded in 1996, delivers comprehensive security services across Northern California. Offerings include static guards, vehicle patrols, executive protection, special‑event staffing, permit enforcement, and HOA community patrols. The firm employs real‑time dispatch technology and a computer‑aided reporting system, ensuring detailed vetted incident documentation for clients today promptly.

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.

CME Security delivers licensed guard services across the San Francisco Bay Area, including unarmed, armed, mobile patrol, event, foot‑patrol, fire‑watch, and integrated security systems. Their multicultural, Hispanic‑owned team serves commercial sites, schools, festivals and more, earning praise for professionalism, rapid response and strong community relationships to protect assets and ensure safety.

Straight Edge Solutions Agency offers security services including uniformed guards, mobile patrols, event security, access control, executive protection, and specialized solutions. The firm emphasizes experienced personnel, customized plans and modern technology. A client‑focused approach and career opportunities are highlighted throughout the site for businesses seeking reliable protection and risk management.

Barrera Intervention is a California security firm offering guard services across the Bay Area. Their portfolio includes firewatch, mobile patrol, event and on‑site security, residential patrol, retail loss prevention, and construction security. They also provide training such as pepper‑spray certification, guard‑card and handcuff courses, serving both commercial and private clients.

Garcia's Security Training offers a range of programs, including Initial Firearms, Power to Arrest, Firearms Requalification, Continuous Education, ECD, OC Spray, and First Aid/CPR/AED. Their Mobile Live Scan provides forensic‑grade fingerprinting, child services, and forms. Notary Public courses, live and online registration, an events calendar, and merchandise are also available.

South County Security offers home security installation and repair, featuring security cameras, alarm systems, smart locks, and video doorbells. The service emphasizes licensed, insured technicians, same‑day appointments, and a no‑fix‑no‑fee guarantee. 24/7 professional monitoring and smart home integration are also available, aiming for reliable, affordable protection for residential customers nationwide.