Comprehensive security services Inc. (CSSI)
Security Guards for Construction Sites.
Secure Your Job Site in California.
Professional after-hours security for construction sites. Protect your tools and assets. Stop site trespassing, tool theft, and vandalism.
Trusted by Builders & Developers
Trusted Security Solutions Serving California Since 1989
Is Your Jobsite Vulnerable After Hours?
Unsecured construction sites lose billions annually to equipment theft and vandalism. Don’t let a security breach delay your project or hike your insurance premiums. Construction sites are prime targets for theft. You need a partner who can deter job site burglaries and prevent costly delays. We provide the visible presence needed to stop site trespassing, especially after-hours.
Stop Job Site Theft
Prevent the loss of lumber, copper, and heavy machinery.
Deter Loitering & Vagrancy
Remove unauthorized individuals, and deter loitering and property damage before it starts.
Liability Coverage
Ensure your site meets insurance and safety requirements with professional oversight.
Comprehensive Protection for General Contractors
We don’t just "watch" your site; we secure it with a multi-layered comprehensive approach. We don't rely on generic solutions. We provide a Comprehensive Security Service customized to your build phase.
Armed & Unarmed Guards
Pre-screened professionals trained in de-escalation. Choose the level of force you need.
Mobile Vehicle Patrols
High-visibility security vehicle patrols for large-scale perimeters and tract housing developments.
24/7 Rapid Response
Immediate intervention for alarms, trespassing incidents, or gate breaches.
AI Surveillance
Construction Security with Mobile AI with evidence grade video and remote AI surveillance.
Physical Security Presence
We provide armed and unarmed pre-screened security guards tailored for any project size across California. Tailored security plans for any site. Stop burglaries and vandalism before they start. Secure your site with CSSI.
De-Escalation Experts
We deploy Armed and unarmed guards trained in de-escalation to stop site violence and trespassing.
Top-Tier Talent
Our roster includes Experienced teams including retired and off-duty law enforcement for maximum protection.
Access Control
Guards physically manage gate access, verify vendor lists, and secure tool storage containers at the end of every shift.
Stop Crime with Mobile AI
Unlike passive cameras, our units use active AI detection to identify threats, loitering, and vagrancy the moment they happen.
Automated Surveillance. Active Deterrence. Evidence Grade Video.
Why choose Comprehensive Security Services?
We are the specialists in construction site protection. Professional after-hours security for construction sites. We stop burglaries and vandalism before they start.
Decades of Experience
Trusted security since 1989, including retired and off-duty law enforcement with years of experience for maximum protection.
Tailored Security Plans
We build a plan specific to your construction jobsite’s layout and risk level for peace of mind.
Regional CA Expertise
Decades of experience serving the unique needs of California construction sites with knowledge of local crime trends.
Security Guards for California
CSSI specializes in serving the following counties in Northern California, Central California, and Southern California, including:
Butte, Colusa, El Dorado, Glenn, Lassen, Modoc, Nevada, Placer, Plumas, Sacramento, Shasta, Sierra, Siskiyou, Sutter, Tehama, Yolo, Yuba Del Norte, Humboldt, Lake, Mendocino, Napa, Sonoma, Trinity
Alameda, Contra Costa, Marin, San Francisco, San Mateo, Santa Clara, Solano
Alpine, Amador, Calaveras, Madera, Mariposa, Merced, Mono, San Joaquin, Stanislaus, Tuolumne
Monterey, San Benito, San Luis Obispo, Santa Barbara, Santa Cruz, Ventura
Fresno, Inyo, Kern, Kings, Tulare
Riverside, San Bernardino
Los Angeles
Orange
Imperial, San Diego
Request Quote
To get an estimate or request a quote, please contact CSSI today for a custom quote. A representative will contact you.
