City skyline at sunset with various tall buildings, including the Salesforce Tower with a glass exterior, and the Transamerica Pyramid, set against a purple and pink sky. Construction cranes are visible atop some buildings, and the scene is framed by dark silhouettes of trees in the foreground.

The Right Presence Changes Everything.

Core1 Security Services provides professional security staffing for events, businesses,
private clients, and commercial properties throughout California.

Protect with Courage. Serve with Compassion.

Security Built on Presence, Judgment, and Professionalism

Core1 Security Services provides professional security officers for clients who need more than just a uniformed presence on-site. Our team focuses on visible presence, calm communication, access control, incident prevention, and respectful service.

We understand that every environment is different. Whether supporting a public event, a private venue, corporate property, or a community gathering, Core1 Security works to maintain order, protect guests and staff, and represent your organization with professionalism.

Security Services in California

Core1 Security Services provides professional security support for a wide range of client needs, including:

Unarmed Security Officers
Professional on-site presence for events, venues, offices, properties, and public-facing locations.

Armed Security Officers
Licensed armed officer services for clients requiring a higher level of protection and visible deterrence.

Event Security
Guest screening, entry control, crowd management, line management, incident response, and support for event staff.

Access Control
Monitoring entrances, checking credentials, managing restricted areas, and helping maintain secure site flow.

Patrol & Site Monitoring
Foot patrol, perimeter checks, parking lot presence, and reporting of suspicious or unsafe activity.

Client & Staff Support
Assisting with directions, de-escalation, lost-and-found situations, policy enforcement, and professional communication.

Incident Reporting
Clear documentation of incidents, observations, and site activity when required by the client.

About Us

Why Clients Choose Core1

Professional Appearance
Our officers understand that they represent both Core1 and the client’s brand.

Calm Under Pressure
We prioritize communication, awareness, and de-escalation before situations escalate.

Flexible Security Support
From one-day events to recurring site coverage, we adapt to each client's needs.

California-Based Experience
We support public venues, private businesses, events, and community-facing environments throughout California.

Service-Minded Protection
Security should feel present, capable, and respectful — not careless, aggressive, or disconnected.

A security officer in black uniform walking past a white police car with yellow and black markings, parked in an outdoor lot near a modern building at dusk.

Commitment to Life Safety

Security Experience

Trusted By Organizations Across California

Core1 Security Services has supported professional environments and public-facing operations connected with organizations such as:

JP Morgan Chase Bank
Team San Jose
Stratoscope
North East Medical Services
Kaiser Permanente
Sutter Health
Oakland Roots
Oakland Ballers
The Unity Council
Additional public, private, and community-facing events throughout California

Client and event experience may include direct, subcontracted, or event-based security support.

A collage of various company and organization logos including Chase, The Unity Council, T-Mobile, Sutter Health, AT&T, Toyota, North East Medical Services, Target, City of Foster City, Pridefest, Oakland Roots, Claire's, WoYee Children's Services, Ford, Ulta Beauty, Integral Communities, LSS of Northern California, Carvana, BioFreeze, San Francisco Marathon, The San Francisco Marinoh, JCPenney, McDonald's, Zappos running, and Bay to Breakers.
A security badge with black background and gold trim. The badge displays the words 'PRIVATE SECURITY' at the top, 'SECURITY SERVICES' at the bottom, and 'CORE1' in the center.

Security For Different Environments

Core1 Security Services supports:

Corporate offices
Healthcare-related environments
Sporting events
Entertainment venues
Private events
Community events
Parking and exterior areas
Commercial properties
Temporary event sites
High-traffic public spaces

A security guard in uniform standing at the entrance of a modern building with glass doors. The guard is smiling and has his hands clasped in front. The building lobby behind him has a marble counter and a welcome sign.
Crowd of people waiting in line outside a venue with a VIP entrance sign, security personnel monitoring the line, modern building exterior, evening lighting.

Professional Security Officer Training & Standards

Trained to Represent, Respond, and Report

Our officers are expected to maintain a professional appearance, communicate clearly, remain alert, and follow post orders specific to each assignment.

Core1 Security emphasizes:

Professional conduct
De-escalation awareness
Access control procedures
Radio and supervisor communication
Incident reporting
Client policy enforcement
Guest and staff support
Site-specific instructions

A security guard scanning a QR code on a woman's smartphone at a hotel reception desk, with a sign in the background that says 'CORE1 SECURITY SERVICES'.
A security officer dressed in black with a badge on his sleeve and a patch on his chest, standing outside during sunset. Behind him, there is a white security vehicle marked with 'Supervisor' and 'Core Security Services' parked in front of a building with a fence in the background.

Request Security Services

Tell us what type of coverage you need, and our team will follow up to discuss the right security plan for your site, event, or organization.

Professional Security Services in San Francisco and throughout California
Event Security Services in the Bay Area
Unarmed and Armed Security Officers in California
Commercial Property Security and Patrol Services

Service Areas


Core1 Security Services provides professional security officers for clients throughout California, including San Francisco, the Bay Area, Oakland, San Jose, and surrounding communities.