Cybersecurity · Denver

Cybersecurity Services in Denver, CO

Denver's own breaches show where attacks land: a school district's file servers, a state agency's file-transfer contractor and, every working day, someone's inbox. NetSys protects Denver businesses with managed detection on every device, locked-down Microsoft 365 identities, filtered email, vulnerability scanning and backups an attacker cannot delete, with an engineer acting on alerts instead of forwarding them.

All IT services in Denver, CO

The short answer

NetSys provides cybersecurity services to Denver businesses: ThreatDown managed detection and response on every computer and server, Microsoft Defender for Business, multifactor sign-in and Conditional Access across Microsoft 365, Barracuda email protection, Rapid7 InsightVM vulnerability scanning, KnowBe4 training and immutable Datto or Veeam backups with tested restores. Protection is remote and cloud-based, run from our Brooklyn office; NetSys does not send engineers on site in Denver. Alerts are handled at every hour, the help desk is staffed from 2 a.m. to 9 p.m. Mountain time, and ongoing security is priced per user per month from an assessment.

Service information by The NetSys Group. Our editorial standards.

How cybersecurity is delivered in Denver

Denver offices are protected through software and policy, all of it managed remotely. ThreatDown and Defender install on each device through NinjaOne, Conditional Access rules in Entra ID decide which sign-ins are allowed, and Barracuda inspects mail before it reaches Microsoft 365. When an alert comes in at 1 a.m. Mountain time, ThreatDown's analysts confirm it and our engineer acts: isolate the laptop, disable the account, revoke its sessions, pull the malicious message from every mailbox. None of that requires anyone in the room, and NetSys does not send engineers on site in Denver. Replacement machines ship preconfigured, and evidence is gathered remotely and preserved for your insurer, counsel or law enforcement. Monitoring runs 24/7 from Brooklyn, and so does emergency service. Our staffed help-desk hours are 4 a.m. to 11 p.m. Eastern time (2 a.m. to 9 p.m. Mountain), seven days a week. The proposal states severe-incident escalation, authorized remediation and any other after-hours work.

What Denver's breaches show about where attacks start

Between December 13, 2022 and January 13, 2023 an intruder took files from Denver Public Schools servers, including employee Social Security numbers, bank details and fingerprints; the district announced it on March 3, 2023. Unwatched file servers and slow detection were the gap. In 2023 the state's Department of Health Care Policy and Financing, which runs Health First Colorado, reported that files on some four million people were taken through MOVEit Transfer at its contractor IBM, without its own systems being breached. In February 2024 the Office of the Colorado State Public Defender shut down its network after data was encrypted by malware, cutting attorneys off from electronic dockets for days. For a Denver business the controls follow: monitoring that notices unusual file transfers, a register of every vendor that stores your data, and offline backups so encryption becomes an outage rather than a catastrophe.

Wire fraud and account takeover downtown and in the Tech Center

The firms that fill the 17th Street towers and the Denver Tech Center, from law practices, title and real estate companies and lenders to wealth managers and engineering consultancies, move money and documents by email every day, which makes them targets for business email compromise. A typical attack needs no malware: a stolen Microsoft 365 password, a forwarding rule hidden in the mailbox, then a reply on a real thread with new wiring instructions. Our controls aim at each step. Conditional Access blocks sign-ins from unmanaged devices and unexpected countries, phishing-resistant methods such as Windows Hello or passkeys replace text-message codes for administrators, Barracuda flags impersonation and lookalike domains, DMARC reduces spoofing of your own domain, and an alert fires when a new inbox rule forwards mail outside the company. Staff learn to confirm any payment change by phone.

Patching, scanning and the January 2027 server deadline

Many intrusions still begin with something unpatched or exposed. NinjaOne patches Windows, macOS and common applications on a schedule you approve, and Rapid7 InsightVM scans every month for what patching missed, including firewalls, printers, storage boxes and the forgotten test server in a closet. Findings come back ranked, with a fix plan and an owner for each. Two dates matter in Denver offices now. Windows 10 support ended on October 14, 2025, so a machine still on it no longer receives security updates unless it is enrolled in Microsoft's paid Extended Security Updates program. Windows Server 2016 reaches the end of extended support on January 12, 2027, and a file or application server on it becomes a standing risk after that. We price the replacement or migration before the deadline rather than after a scanner finds it exploited.

Healthcare, legal and financial rules that set Denver's security bar

Denver's professional economy runs on regulated data. Medical practices and clinics answer to the HIPAA Security Rule, whose risk analysis and access-control standards are current law; the update HHS proposed in January 2025 is still a proposal. Lawyers must make reasonable efforts to prevent unauthorized disclosure of client information under ABA Model Rule 1.6(c). Tax preparers, lenders and mortgage brokers fall under the FTC Safeguards Rule, which requires a written security program, multifactor authentication and encryption of customer data. Registered advisers and broker-dealers must meet SEC Regulation S-P as amended in 2024, including an incident response program with customer notification. We map the controls each rule expects to the tools we run and keep the evidence ready for an auditor, an insurer or a client questionnaire. This is general information, not legal advice.

What is included

Cybersecurity in Denver: what NetSys delivers

Watch and respond

ThreatDown MDR and EDR on every device, with a 24/7 team that isolates and investigates rather than emails
Rapid7 InsightIDR or Microsoft Sentinel collecting identity, email, endpoint and firewall logs so an intrusion is visible in one place

Harden the tenant and the people

Microsoft Defender for Business, Entra ID Conditional Access and phishing-resistant sign-in for finance staff
Legacy authentication off, dormant accounts closed, forwarding rules and consent grants reviewed monthly

Measure and recover

Rapid7 InsightVM scans of the internal and external footprint, with a monthly fix list
Managed firewall with intrusion prevention, segmentation and vendor access that is logged and switched off when the work ends

Published case study

Law office: layered security on Microsoft 365 with cloud-to-cloud backup

A 25-attorney firm needed client confidences protected better than a closet server could manage. Alongside a Microsoft 365 migration, NetSys layered anti-phishing and email threat protection, DNS filtering, multifactor authentication on every account and endpoint protection across attorney devices in the office and remote, and established independent cloud-to-cloud backup of the entire tenant because the recycle bin is not a backup strategy for privileged material. The firm reported 82% fewer IT support incidents per month within two quarters.

Read the full case study (25 attorneys + staff)

From our client work

Cybersecurity work for other clients

Insurance
Regional title insurance company
Barracuda email protection for 85 users, phishing simulations, employee security training, and MFA deployment.
Security Awareness & Phishing Training IT for Insurance Agencies and Brokers

Client names are withheld. These examples were chosen for the work involved, not for where the client is, so none is presented as a Denver client.

What cybersecurity costs in Denver

Cybersecurity is priced per user per month when it runs as an ongoing service, and per project for an assessment or a remediation. What moves the number: how many devices and identities are in scope, how much incident remediation and recovery is needed beyond the monitoring and authorized MDR actions in scope, which compliance standard the evidence has to satisfy, and whether the Microsoft 365 tenant is already on Business Premium or the security tooling comes from us. The free external penetration test costs nothing and runs remotely before any of that. Our managed IT pricing page explains how the fee is built.

How the monthly fee is built

Who this fits, and who it does not

Best fit: businesses with enough people, money movement or regulated data that a breach would hurt, and no security team of their own: professional practices, healthcare groups, importers, financial firms, nonprofits and agencies holding client credentials. Companies with an internal IT person fit as a co-managed arrangement.

Cybersecurity in Denver: FAQs

How does cybersecurity work for Denver organizations?

Remotely and continuously. Our security tools run on every device and in your Microsoft 365 tenant, ThreatDown's analysts and our engineers watch alerts at every hour, and response actions, from isolating a computer to resetting an executive's account, happen over the network as soon as a threat is confirmed. People in your office reach the help desk between 2 a.m. and 9 p.m. Mountain time to report anything suspicious. NetSys has one office, in Brooklyn, NY, and no staff in Colorado; new or rebuilt computers ship ready, and anything physical is handled by your team.

What do cybersecurity services in Denver cost?

Continuing security is a monthly per-user fee set by an assessment, sold alone or inside managed IT, and projects such as a deeper assessment or remediation are quoted after scoping. The number of devices and accounts, how many Microsoft 365 tenants and email domains you run, the evidence your industry or insurer requires and whether your licenses already include Defender and Conditional Access move the figure most. Fixing what the first scan finds is usually the largest one-time cost, and we price it before starting.

What does a security assessment of a Denver office include?

It starts with the free remote external penetration test, which checks what your firewall, VPN, remote-access portals and public services show the internet within a scope you approve in writing. A fuller assessment, scoped and priced separately, reviews Microsoft 365 tenant settings, sign-in and admin roles, device protection, the internal network, email authentication records and backups. You get a findings list ranked by risk with an estimated cost and effort for each fix, which becomes the first ninety days of work if you continue with us.

How should we check a software vendor's security after MOVEit?

Treat each vendor that stores or moves your data as part of your network. Ask where your files sit, who at the vendor can reach them, whether multifactor sign-in protects their admin access, how quickly they patch, and how and when they will tell you about an incident. Colorado's statute, C.R.S. 6-1-713.5, expects a business to require reasonable security from service providers it shares personal information with, so put those answers in the contract. We keep a vendor register in IT Glue, turn off integrations nobody uses and limit what each one can reach in Microsoft 365.

What should a Denver employee do after approving a fake sign-in prompt?

Call the help desk immediately, even if nothing looks wrong. The engineer revokes the account's sessions, resets the password and the multifactor registration, checks for new inbox rules, app consents and mailbox forwarding, and reviews recent sign-ins for the attacker's location. If the account had admin rights, the review widens to the whole tenant. Reporting quickly matters more than anything else, and nobody is blamed for it; repeated prompts are themselves a sign that someone already has the password.

Start with the free test

See what an attacker sees before they do.

The free assessment is a remote external penetration test, limited to the information available to NetSys and the external scope we agree with you. Internal reviews and ongoing security management are scoped separately.

Explore Cybersecurity Scope 845-203-3914