Cybersecurity AI & IT Experts for You
Smarter Security. Stronger Support.
Why It Matters?
✓ Stop threats before they cause damage
✓ Protect sensitive data from new-age attacks
✓ Avoid downtime with smarter IT solutions
✓ Feel confident knowing experts are on your side
Your Challenges:
You’re hearing about AI-driven threats—but unsure how to defend against them
Your current IT or security setup feels reactive, not proactive
You’re worried your data, devices, or team might be vulnerable
You want modern protection without adding tech headaches
Our Solution:
We bring AI-powered cybersecurity and expert IT support together to protect your business from modern threats. At D1 Defend, we help companies in SoCal and beyond simplify their security and tech needs—without overcomplicating it. Whether you’re upgrading defenses, hardening your network, or just need expert eyes on your setup, we’ve got your back.
🔧 What We Provide:
AI-Enhanced Threat Detection & Response
Proactive IT Management & Network Support
Risk Assessments & Gap Analysis
Compliance Guidance (CMMC, NIST, HIPAA, etc.)
Cloud Security & Email Protection
Employee Training (Including AI Safety Awareness)
Dedicated Local Experts, Always a Call Away
D1 Defend was founded in 2007, D1 Defend is a leading provider of managed IT services and cybersecurity solutions. Headquartered in Chino, California, we’ve spent over a decade helping businesses like yours leverage technology to drive success. From small businesses to mid-market enterprises, we specialize in creating customized solutions that simplify IT management and protect against modern threats.
Let’s Talk—No Pressure.
Not sure where to start with AI-driven security? No problem. We’ll break it down simply and help you build a smarter, safer business—one step at a time.
See What Our Client’s Are Saying About Us
Jennifer H
In consulting with D1 Defend, we are very happy with their prompt communications and great attitudes…We are extremely happy with their overall guidance with the planning phase of office and suggestions on what items were needed. Their expertise in the areas of internet cabling to internet and phone installation, where we had no knowledge is superb.
Cliff H
Eddie and the D1 team have been great in deploying our new branch locations. On-time, clean, courteous, and professional. We wouldn’t have been able accommodate our rapid growth without the help of D1 Defend and their ability to deploy our IT requirements in a moment’s notice. I have full confidence in our future deployments knowing D1 is on call.
Tandra C
We moved over to D1 Defend because we experienced long turnaround times with our previous IT provider, which then lead to our point of contact person not responding to our calls and emails. We have been with D1 Defend for over a year and have never had an issue with service – they have been great!
Thinking of Changing Your IT Managed Services Provider?
Contact D1 Defend today to discover how we can transform your IT infrastructure and support your business growth.
Make The Right Decision
Download Cybersecurity AI Checklist Here
Your important information could be stolen, which can be a disaster.