01
Construction Sites
Changing work zones, equipment, materials, and access points can make a site difficult to watch consistently. CAT III can shape coverage around active work and after-hours conditions.
Trusted Security You Can Count On
Your safety is our top priority. CAT III Security provides armed and unarmed guards, mobile patrol, fire watch, event security, and customized solutions tailored to the unique needs of your business and property.
With professional security personnel and responsive management, we help protect your property, staff, clients, and operations—providing reliable protection and peace of mind.
Licensed & Insured
Main security services
Security Guard Services Across Southern California
01
Unarmed Security Guards
A visible, professional presence for people, property, entrances, and daily operations.
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Armed Security Guards
Professional armed coverage for assignments where the risk profile calls for an added level of protection.
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Mobile Patrol Services
Scheduled patrols that add visibility across parking areas, perimeters, buildings, and common spaces.
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Construction Site Security
Site-focused coverage for equipment, materials, access points, and active work zones.
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HOA & Apartment Security
Resident-focused coverage for entrances, amenities, parking areas, and community routines.
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Commercial Property Security
Professional protection for offices, retail properties, mixed-use sites, and their occupants.
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Warehouse Security
Coverage for loading areas, access points, inventory environments, and industrial properties.
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Hotel Security
A professional, guest-aware presence for entrances, common areas, parking, and hotel operations.
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Fire Watch Services
Dedicated observation and documentation for locations that require fire-watch coverage.
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Event Security
Planned staffing for entrances, guests, vendors, crowd movement, and changing event conditions.
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Corporate Security
Site-specific coverage for offices, employees, visitors, executives, and business continuity.
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Emergency / Same-Day Security Coverage
A direct path to discuss urgent, temporary, or immediate security staffing needs.
Learn moreCustomized Security Solutions
Every property and security need is different. CAT III Security provides customized security solutions based on your location, coverage requirements, schedule, and service needs.
REQUEST A SECURITY QUOTEIndustries we serve
Built for the site.
02
Apartment Communities
Residents, visitors, parking areas, amenities, and shared entrances each create different routines. Coverage can add a professional presence where property teams need it.
03
HOAs / Gated Communities
Gate activity, common areas, visitor access, and resident concerns require a plan that fits the community. CAT III can build coverage around those specific patterns.
04
Commercial Properties
Tenants, visitors, deliveries, parking, and public-facing spaces all influence a property’s security needs. We coordinate coverage with the operating day.
05
Office Buildings
A professional presence can support entrances, visitors, employees, and after-hours activity while fitting the tone of a working office.
06
Warehouses & Industrial Facilities
Loading areas, vehicle movement, restricted zones, and inventory environments need clear procedures and consistent awareness.
07
Hotels
Hospitality security must support guests and staff without losing sight of entrances, common areas, parking, and operational access.
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Retail Centers
Retail properties manage public access, tenant activity, parking areas, and changing foot traffic. A visible assignment can help teams address concerns as they arise.
09
Corporate Facilities
Corporate environments need security that respects business continuity, employees, visitors, executives, and the facility itself.
10
Residential Communities
Shared residential spaces benefit from coverage that understands resident routines, visitors, parking, and common-area activity.
11
Events
Event conditions change quickly as guests arrive, vendors work, and crowds move. Planning the assignment around the venue and schedule keeps responsibilities clear.
Why choose CAT III Security
A clear standard for coverage.
01
Licensed & Insured
PPO# 121993
02
Professional Security Personnel
A trained, uniformed presence for the assignment.
03
Responsive Management
Clear communication around the coverage plan.
04
Customized Security Plans
Coverage shaped around the site and schedule.
05
24/7 Coverage Options
Discuss day, night, recurring, or continuous needs.
06
Mobile Patrol Options
Add visibility across larger properties and perimeters.
07
Emergency Deployment
A direct path for urgent coverage conversations.
08
Clear Incident Reporting
Documented information to support property teams.
09
Professional Security Presence
Visible coverage that fits the environment.
10
Rapid Response to Security Concerns
A responsive point of contact when conditions change.
Security problems we help address
Stay ahead of the conditions.
Every property has a different set of concerns. CAT III helps clients plan coverage around the activity, access, and exposure they see on the ground.
Theft
Vandalism
Trespassing
Unauthorized Access
Loitering
Property Damage
Vehicle Break-Ins
After-Hours Activity
Construction Material Theft
Disturbances
Access-Control Concerns
Service area
Southern California coverage.
Serving San Diego, Orange, Los Angeles, and Riverside Counties, as well as the Inland Empire.
Start with the site
Request a security quote.
Tell us what needs coverage, where it is located, and when you need support. 619-771-7204 / info@cat3security.com
Client feedback
Google Reviews
A few words from clients who have worked with CAT III Security.
Sukhman Sandhu
2 reviews · 16 photos
4 months ago
★★★★★
We had CAT 3 Security for our property in Mira Mesa after dealing with some break-ins, and honestly it was the right call. They came in, walked the whole property, and really took the time to figure out where the weak spots were. They covered all the risk areas, even things we didn’t really notice before. Since they started, everything has been way better. No more issues, and the whole place just feels a lot safer now. It’s a big relief not having to worry like we were before. You can tell they know what they’re doing and actually care about keeping your property secure. Definitely glad we went with them. Their professionalism, quick response, and attention to detail really stand out. If you need dependable security guards or property protection in San Diego . I definitely recommend CAT III Security.
Google Reviews
Sawan Dahiya
4 reviews
6 months ago
★★★★★
Really professional security guards. Aj made it very easy for us in short notice he provided unarmed guard the same day. Guard was always on time and reporting every hr. Definitely recommend them.
Google Reviews
Christianne Duarte
2 reviews • 0 photos
Oct 17, 2024
★★★★★
Amazing Customer Service. Will be using them for all of our events.
Google Reviews
Kevin Gibson
1 review • 0 photos
Aug 5, 2024
★★★★★
Cat III security is one of the best security company's in san diego that we worked with. This security company went beyond everything and provided us best security. Very professional and reliable in a affordable price. Highly recommend them.
Google Reviews
Mos Motors
1 review • 0 photos
Jul 30, 2024
★★★★★
Exceptional service from CAT III SECURITY. Professional, vigilant and reliable team that ensures peace of mind. They handled our security needs with precision and courtesy. Highly recommended for anyone seeking top-notch security solutions.
Google Reviews
Chris Butkowski
1 review • 0 photos
Aug 4, 2024
★★★★★
Mohammad and his team offer an exceptional service. He is professional and respectable and I would highly recommend him for quality work in keeping your property secure
Google Reviews
Tomas Rivera
2 reviews • 0 photos
Aug 8, 2024
★★★★★
Great company took care of our equipment. Did an amazing job for our construction site definitely will get them again.
Google Reviews