Business IT,architected tostay out of your way.
Managed IT, cybersecurity and real-person support for companies across the Inland Empire. Headquartered in Rancho Cucamonga, on site the same day, accountable in writing.
Backups verified · 412 endpoints · 38 servers · last restore test passed
Everything a growing company needs from IT, under one accountable roof
One partner, one monthly number, one phone call when something breaks. Start with managed IT, or hand us the whole stack.
Managed IT Services
Your entire IT environment — monitored, maintained and supported for one flat monthly fee.
ExploreCybersecurity Services
Layered protection sized for a real business — not an enterprise budget.
ExploreIT Support & Help Desk
A real person, fast — by phone, chat, email or at your desk.
ExploreCloud & Microsoft 365
Migrate, secure and actually use the cloud you're already paying for.
ExploreNetwork Support & Cabling
Wi-Fi that reaches the warehouse and a network that is actually documented.
ExploreBackup & Disaster Recovery
Backups you have watched restore — before the day you need them.
ExploreIT Compliance: HIPAA, CMMC & PCI
Controls, evidence and documentation that satisfy auditors and insurers.
ExploreVoIP & Business Phone Systems
Phones that follow your team — desk, mobile and laptop — for less than the old PBX.
ExploreIT Consulting & Virtual CIO
Executive-level technology planning without an executive-level salary.
ExploreCo-Managed IT
Your internal IT team, backed by our tools, depth and after-hours coverage.
ExploreWe architect before we fix
Most providers chase tickets. We document the environment first, fix things in the right order and then keep them that way. Scroll through the three phases.
Assess
A free, one-hour review of your environment: every device, server, cloud account and license, measured against cyber-insurance requirements. You get a written summary and a fixed price.
- Inventory and documentation baseline
- Security gaps ranked by business risk
- Backup and recovery reality check
Architect
We fix the highest-risk items first, deploy monitoring and the security stack, and document everything in a system you own. Typical onboarding: two to four weeks, with no disruption to your team.
- MFA, managed EDR, email security, immutable backup
- Network and firewall standardization
- Runbooks and a named point of contact
Operate
Unlimited help desk with a 15-minute response target, same-day on-site across the Inland Empire, quarterly reviews and a roadmap that keeps technology ahead of the business instead of behind it.
- 24/7 monitoring and patching
- Quarterly business review with budget
- Month-to-month: we earn it every month
Local, senior and accountable in writing
Most of our clients came from a provider that was slow, far away or impossible to reach. We designed the company around those three complaints.
Built for the businesses that run the Inland Empire
Compliance frameworks, line-of-business applications and the realities of a warehouse floor or a dental front desk — we already know them.
Healthcare & Medical Offices
HIPAA-ready IT for clinics, dental practices, imaging centers and specialty groups.
How we help →
Law Firms
Secure, confidential and always available — because billable hours don't wait for IT.
How we help →Accounting & CPA Firms
Tax season uptime, client data protection and a Written Information Security Plan.
How we help →
Manufacturing, Warehousing & Logistics
Networks that reach the dock, systems that keep lines running, security that satisfies your customers.
How we help →Construction & Trades
Office, job site and truck — connected, secure and backed up.
How we help →
Nonprofits & Associations
Enterprise-grade protection on a mission-driven budget.
How we help →Problems we solve, and how
Representative engagements drawn from the work we do most often across the region.
A 35-person CPA firm in Ontario passes its first cyber-insurance audit
The firm's insurer threatened non-renewal unless MFA, endpoint protection and tested backups were in place within 60 days — in the middle of tax season.
Warehouse Wi-Fi that finally reaches every aisle in a Fontana distribution center
Scanners dropped connection in the back third of a 180,000-square-foot building, forcing staff to walk to the office to sync picks. Overtime was climbing and a major retail customer had flagged accuracy.
A multi-location medical group in Riverside gets HIPAA-ready without replacing its EHR
Three clinics shared logins, used personal email for referrals and had never completed a HIPAA risk assessment. A new hospital partnership required proof of safeguards within one quarter.
Actually in the Inland Empire
Dispatched from Rancho Cucamonga, same day, across the I-10, I-15 and I-215 corridors. Los Angeles and Orange County supported remotely and on scheduled visits.
Select a city
Six questions every cyber-insurance carrier is already asking you
Answer honestly. You get a score, a plain-English verdict and the three things to fix first — no email required.
- Based on the controls underwriters now require
- Takes about a minute
- Nothing is stored or sent
Does every employee use multi-factor authentication for email and remote access?
When did you last restore a file or server from backup to prove it works?
Do you know exactly who has administrator access to your systems today?
Does every computer run managed endpoint protection — not consumer antivirus?
If your main server or cloud account died today, how long until you're working?
Has your team done phishing-awareness training in the last 12 months?
Questions business owners ask us first
Straight answers, before the sales call.
Where is Quantum Digital Architects located?
We are headquartered in Rancho Cucamonga, California, and serve businesses throughout the Inland Empire — Ontario, Riverside, San Bernardino, Fontana, Corona, Upland, Chino Hills, Pomona, Temecula and surrounding cities — as well as clients across Los Angeles and Orange County.
What size businesses do you work with?
Most of our clients have between 10 and 200 employees: medical and dental practices, law and CPA firms, manufacturers, distributors, contractors and nonprofits. We also support smaller offices that need professional-grade security.
How quickly can you start?
A free assessment can usually be scheduled within a few business days. Onboarding a managed-IT client typically takes two to four weeks, during which we document your environment, deploy monitoring and security tools and meet your team.
Do you require long-term contracts?
No. Quantum works month to month. We put our response commitments in writing and expect to earn your renewal every month.
Can you support multiple locations?
Yes. Many clients operate from two to ten sites across Southern California. We connect them securely, standardize equipment and support every location from one help desk.
Book a free IT assessment
In one hour we document your environment, flag the risks that matter and give you a written summary with real numbers. Most owners learn something they did not know about their own network.
- Inventory of devices, servers, cloud accounts and licenses
- Security gaps measured against cyber-insurance requirements
- Backup and recovery reality check
- A fixed monthly price if you want one