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

Diligence Security Group, a veteran‑owned firm, delivers licensed, insured security across California. Services include armed and unarmed guard posts, mobile patrols, executive protection, risk‑assessment consulting, and integrated surveillance technology. Personnel are military‑trained, operate 24/7 with real‑time communication, and follow structured deployment protocols for government, commercial, residential and critical facility clients.

Alpha Patrol Security provides licensed armed, unarmed, and specialized guards—including termination, event, and patrol services—plus video surveillance operators and advanced camera systems. The firm partners with off‑duty police, offers rapid‑response mobile patrols, and emphasizes community employment and professional training across residential, commercial, and industrial properties for client peace and safety.

Bay Valley Security provides private security services under PPO license 120869, leveraging more than 18 years of industry experience. Their unarmed guards undergo background checks and maintain clean driving records. Service offerings include construction, fire‑watch, gatehouse, commercial, office, high‑rise, retail, hotel, medical, event and vehicle patrols. Free quotes are available.

Strong Integrity Security Services offers a full suite of guard solutions, including commercial, residential, emergency, event, construction‑site, and mobile patrol staffing. Clients can choose armed or unarmed personnel, with 24/7 rapid response and access‑control expertise. The firm highlights professional training, visible deterrence, and tailored protection for diverse property types needs.

Reliable Security Guard Services REQUEST A QUOTE 20 Years of Experience At All Nation Security Services, we deliver more than just security solutions—we provide peace of mind. As a professional se…

Citiguard provides professional security guard services in California for businesses, construction sites, residential communities & events. 24/7 Licensed Security.

Become a highly trained security officer with assistance from our team at The Loss Prevention Group LPG in Oakland, CA, Get a Free Enquiry.

We provide focused protection services at Focal Point Security with trusted expertise. Secure now.

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.