4 Diamond Security
Premium Security Services
Contact Information
Business Hours
Monday: 7:00 AM – 7:00 PM
Tuesday: 7:00 AM – 7:00 PM
Wednesday: 7:00 AM – 7:00 PM
Thursday: 7:00 AM – 7:00 PM
Friday: 7:00 AM – 7:00 PM
Saturday: Closed
Sunday: Closed
About 4 Diamond Security
Our highly professional team comprises of security guards and patrolling. We provide protection against theft, vandalism, fire and illegal activities. We have years of experience in handling a vast array of events: Private parties, Corporate events, Weddings, Quinceañeras, Jaripeos (Rodeos), Music Concerts & Videos, SF Carnival, Ethnic Festivals, and Covid-19 Testing sites and County Flu Vaccine clinic, Foodieland, Jurassic Quest, Santa Clara County Fair 2021, SaaStr 2021. We currently are working 24/7 on San Mateo County Event Center.
Our Mission
Is to provide Security services of the highest quality with the aim of protecting the life’s, and interests of our clients, as delivered with respect, integrity, do diligence, friendly company spirit.
Our Services
Armed Guards
Professional Armed Guard services for your safety and protection. Hire licensed, trained security officers for businesses, events, and high-risk situations.
Security Guard Service
Reliable Security Guard Services tailored for commercial buildings, retail stores, and construction sites. On-site, mobile, and 24/7 protection available.
Unarmed Guards
Find top-rated unarmed guard companies for offices, retail, and residential properties. Affordable, professional, and reliable service
Certifications & License
Join our Network of Trusted Providers
List your company and join our community of trusted security providers, and connect with clients actively seeking security services. Increase visibility, generate leads, and grow your business effortlessly