5.0 on Google & Clutch 96%LIVE of calls answered in under 60 seconds by our local Huntington Beach team

ThreatLocker application allowlisting, managed for you

Antivirus looks for known bad software. ThreatLocker flips that around: nothing runs on your computers and servers unless it’s been approved. We set it up, learn your normal software, handle approval requests and keep the rules current — so ransomware and unknown tools simply don’t start.

96%LIVE of calls answered in under 60 seconds by our local Huntington Beach team 24×7 NOC & SOC monitoring SOC 2 Type II all five Trust Services Criteria On-site support, included 5.0 on Google & Clutch

CAL IT Group engineers at work in front of the CAL IT Group logo wall

What ThreatLocker does

  • 01 · Allowlist

    Only approved software runs

    Every program, script and library has to be on your approved list. Ransomware, unknown tools and anything a user downloads by mistake simply won’t start.

  • 02 · Ringfence

    Approved apps stay in their lane

    Even trusted software is limited to what it needs, so a compromised Office macro or PDF reader can’t launch PowerShell, reach your file shares or talk to the internet.

  • 03 · Elevate

    Admin rights only when needed

    No one works as a local administrator. When an approved installer or tool needs elevated rights, it gets them for that task only.

  • 04 · Storage

    USB and file access control

    Block or limit USB drives and control which applications can open sensitive folders, with a full audit log.

  • 05 · Requests

    One-click approval requests

    When someone needs new software, they request it from the block message. Our engineers review it and approve it for that person, a team or everyone.

  • 06 · Report

    Evidence for audits and insurers

    A record of what ran, what was blocked and who approved what, useful for CMMC, compliance and cyber insurance questionnaires.

How we roll it out

  1. Learn. ThreatLocker runs in learning mode on every computer and server, recording the software you actually use.
  2. Review. We turn that into your allowlist and ringfencing rules, and walk you through anything unusual we find.
  3. Secure. We switch on enforcement in stages, starting with the lowest-risk machines, with our service desk ready for requests.
  4. Run. We handle approval requests, keep rules current as software updates, and review the logs as part of our monitoring.

Part of your security stack

ThreatLocker adds a zero-trust layer to the protection already in Managed Care: managed detection and response, vulnerability management and 24×7 monitoring by our NOC & SOC. It’s added per device, and our team runs it day to day.

Add ThreatLocker See Managed Care pricing

What sets us apart

Fast response, deep security, senior expertise and engineers on-site.

<60 sec to a live engineer

Response time you can measure

96%LIVE of calls are answered by an engineer in under 60 seconds, every ticket is assigned in under 10 minutes, and every email or portal ticket gets a real engineer within 20 minutes (Mon–Fri, 5 AM–6 PM). Calls never go to voicemail during service desk hours, and the same team is on call 24×7.

See the live numbers →

24×7 NOC & SOC MSSP-grade security

A security provider, not just an IT provider

We operate as a managed security service provider (MSSP): SentinelOne MxDR, a 24×7 NOC & SOC, managed SIEM, DefensX browser security, security awareness training, vulnerability management, penetration testing and CMMC support — run by a team audited for SOC 2 Type II across all five Trust Services Criteria.

Our security services →

55+ years of combined experience

Senior technical expertise behind every ticket

Led by hands-on co-founders Kevin Nichols and Joe Kemp, with 55+ years of combined IT experience. Every engineer passes a technical assessment, we staff above our workload, and nobody works on something they’ve never seen before without an experienced engineer alongside — no call center, no offshore tier.

Meet the founders →

On-site included, no trip fees

Engineers who come to you

When hands-on work is needed, a local engineer is dispatched from our Huntington Beach office. On-site support is included in Managed Care — no dispatch fees, trip charges or hourly on-site rates — from the same team that knows your environment.

Areas we serve →

We re-earn your business on every ticket. No contract ever replaces doing the work well. Every user who opens a ticket gets a satisfaction survey when it closes, and every score is visible to our whole team and leadership — the averages are published live for anyone to see.

See our survey results →

Best-of-breed, by design

Industry-leading tools, chosen and run by engineers

We’re technology agnostic: we don’t resell a single vendor’s bundle or push the platform with the best margin. Every tool we recommend is a best-of-breed industry leader — selected, tested and configured by our own engineers because it’s right for your business.

Our leadership team is highly technical. Our co-founders, Kevin Nichols and Joe Kemp, are hands-on engineers, not just managers, and they constantly re-evaluate our tools and service offering — retiring what falls behind and adding what keeps clients ahead. You get enterprise-class technology that keeps improving, without lifting a finger.

  • SentinelOneMxDR endpoint protection
  • Microsoft DefenderPlan 2 & Intune device management
  • QualysVulnerability management
  • LiongardConfiguration & change monitoring
  • NinjaOneRemote monitoring & patching
  • 24×7 NOC & SOCManaged SIEM & threat hunting
  • Veeam + AzureBackup & off-site replication
  • Azure Site RecoveryCloud disaster recovery

Just some of the technologies we use.

ThreatLocker FAQs

Is ThreatLocker included in Managed Care?

ThreatLocker is an add-on, billed per device alongside your Managed Care plan. We handle the setup, the learning period, approval requests and ongoing rule changes.

Won’t it block software my team needs?

We start in learning mode, which records the software you already use and builds your allowlist from it before anything is blocked. After that, if someone needs something new, they request it in one click and we review and approve it, usually within minutes during service desk hours.

How is this different from antivirus or EDR?

EDR watches for malicious behavior and stops attacks in progress. Allowlisting stops unapproved software from running at all. Together they cover both: unknown programs can’t start, and anything that misbehaves is caught.

Does it slow computers down?

No noticeable impact for day-to-day work. It checks each program against your approved list as it starts.

Can it control USB drives?

Yes. Storage control can block USB drives entirely, allow only approved devices, or make them read-only, with a log of what was accessed.

Success stories

Rated 5.0 on Google and Clutch.

Real reviews from the businesses we support — not a curated quote wall.

★★★★★Google
“Knowledgeable and proactive group that partners with you to assure your objectives are met, along with planning for future needs. All balanced with supporting your business day in and day out with a friendly, responsive and competent help desk. Recommend and would select them again!”
Tom G
★★★★★Google
“CAL IT has been a game changer for us. They tackle issues quickly and efficiently for us. So grateful their expertise. I highly recommend their services.”
Kelli Foudy
★★★★★Google
“We have worked with Cal It for several years now, They are very responsive and professional. We would highly recommend them.”
Cathy Goff

Customer service first · we re-earn your business on every ticket

Obsessive about service. Relentless about the details.

CAL IT Group brings enterprise-class IT, cybersecurity and SOC 2 Type II–audited operational excellence to small and midsize businesses across Southern California — a customer service organization first and foremost, proven day in and day out for over 10 years.

Call 866.24.CALIT