Best Security Guards Companies in South San Francisco, California

Nationwide Investigations & Security offers a range of Bay Area services, including security guards, private investigators, bodyguard and VIP protection, fire‑watch, OSHA‑certified safety consulting, and access‑control/CCTV installation. The firm operates 24‑hour response, accepts short‑ and long‑term contracts, and serves San Francisco, Los Angeles, and Oakland, providing flexible deployment and compliance support for clients.

Eagle Protective Services offers security guard, patrol, and executive protection across California and the U.S. With 15 years in the industry and management totaling over 40 years of law‑enforcement experience, the firm emphasizes 24/7 availability and a focus on trained personnel. Services target businesses seeking reliable protection and peace solutions.

Baystar Security Patrol provides 24/7 daily security patrols for apartments, offices, residential communities, and events. Their guards are trained to handle incidents and conduct. Services include armed and unarmed guard work, executive/VIP protection, and full coverage for hotels, airports, logistics, vacant properties, and construction sites across the San Francisco Bay Area.

Mint Security, founded in 2013 by former French Foreign Legion soldier Johnny Tomasella, offers 24/7 armed and unarmed guard services throughout the San Francisco Bay Area. The firm uses GPS monitoring, BSIS‑approved training, and flexible pricing. Client feedback highlights reliable response, professional conduct, and effective de‑escalation tactics, including retail and events.

1st Defense offers uniformed security, event protection, and video surveillance for commercial and private clients. The site highlights a two‑year streak winning Oakland’s Best Private Patrol Service award and inclusion in the 2023 Business Hall of Fame. Contact details and social media links are provided on the site for inquiries.

ABC Security Service delivers armed and unarmed guard solutions for airports, construction sites, government facilities, schools, hospitals, maritime ports, residential complexes, and retail venues. With over 50 years in the industry, the firm emphasizes training, a Ten‑To‑Win quality program, and compliance with Homeland Security standards. Openings include armed guard positions.

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…

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.

Armorous Security provides guard and patrol services Northern California, covering Napa, Sonoma, Bay Area, Alameda, Marin, Sacramento, Mendocino and Lake counties. Offerings include armed/unarmed guards, vehicle patrols, emergency response and deterrent systems for commercial, construction, cannabis, HOA, winery and hospitality sites. Recognized in awards; feedback notes guard selection and communication.

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.

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

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.