Cybersecurity · Dallas

Cybersecurity Services in Dallas, Texas

In roughly a year, ransomware took down the Dallas Central Appraisal District, the City of Dallas and Dallas County. NetSys gives Dallas companies the controls that block the common attack paths, a security operations center watching every endpoint, and the documentation regulators and insurers ask for, delivered remotely from our Brooklyn office.

All IT services in Dallas, TX

The short answer

NetSys provides cybersecurity services to Dallas businesses: ThreatDown managed detection and response backed by a staffed security operations center, Microsoft Defender for Business, Entra ID Conditional Access and multifactor authentication, Barracuda email protection, Rapid7 vulnerability scanning, KnowBe4 phishing training, Keeper password management and immutable backups, with reports that map to SEC Regulation S-P, HIPAA and Texas law. Everything is delivered remotely and through the cloud, and no NetSys engineer works on site in Dallas. Monitoring and emergency service run 24/7; the help desk is staffed seven days a week from 4 a.m. to 11 p.m. Eastern time (3 a.m. to 10 p.m. Central).

Service information by The NetSys Group. Our editorial standards.

How cybersecurity is delivered to Dallas companies

The service lives in your devices and your cloud tenant, so distance does not slow it down. ThreatDown agents report to a security operations center that can isolate an infected machine at 2 a.m. without waiting for anyone to wake up. Our engineers in Brooklyn tune Conditional Access so sign-ins from unmanaged devices or unexpected countries are blocked, review Defender and Barracuda alerts, and work through Rapid7 findings by risk. No engineer is dispatched to a Dallas office; containment, credential resets and restores all happen over the network, and a replacement for a compromised laptop ships enrolled in Intune. Each month you get a short report on threats blocked, patches applied, open risks and phishing test results. 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 (3 a.m. to 10 p.m. Central), seven days a week. The proposal states severe-incident escalation, authorized remediation and any other after-hours work.

What the City of Dallas ransomware attack showed

The city's own after-action review is unusually specific. The Royal ransomware group got into the City of Dallas network on April 7, 2023 through a basic service account in the domain, spent nearly four weeks moving through it, and launched encryption at 2:04 a.m. on May 3. Police, courts and 311 systems were disrupted, the last affected server was restored on June 13, and personal data of more than 30,000 people was exposed. The City Council approved an $8.5 million budget for the response. A private company's version of that story usually begins the same way, with an overlooked account that has a weak password and too much access. That is why our onboarding inventories every service account, removes admin rights nobody needs, and puts sign-in and endpoint telemetry in front of people who actually read it.

Dallas County, Play ransomware and exposed firewalls

Five months later, Dallas County had its own incident. The county became aware of it on October 19, 2023, the Play ransomware group leaked stolen files when the county refused to pay, and in July 2024 the county began notifying 201,404 people whose data, in some cases including Social Security numbers and medical information, had been exposed. CISA's advisory on Play says the group gets in with valid accounts bought or stolen elsewhere, or by exploiting internet-facing systems, including known FortiOS VPN flaws and Microsoft Exchange vulnerabilities. How the county was entered has not been described publicly, but the defenses against both methods are the same for any Dallas business: firewall and VPN firmware kept current, multifactor authentication on every remote login, and staff credentials monitored for exposure in breach data.

Financial firms on Y'all Street: Regulation S-P and the Safeguards Rule

Dallas is turning into a second financial center. Goldman Sachs is building an 800,000-square-foot office tower in Victory Park, with employees due to move in through 2028, and the SEC approved the Dallas-based Texas Stock Exchange as a national securities exchange in September 2025. The advisers, broker-dealers and family offices that cluster around them now work under SEC Regulation S-P as amended in 2024, which requires an incident response program and notice to customers whose sensitive information was, or is reasonably likely to have been, accessed without authorization. Larger firms had to comply by December 3, 2025 and smaller ones by June 3, 2026. Mortgage, lending and tax firms outside SEC jurisdiction fall under the FTC Safeguards Rule, and tax preparers also follow IRS Publication 4557. We build the controls and keep the evidence these rules ask for.

Texas privacy law and what it asks of your security program

The Texas Data Privacy and Security Act has applied since July 1, 2024 to companies that do business in Texas and process personal data, apart from small businesses as the SBA defines them, which mainly face its consent rule for selling sensitive data. Covered companies must keep reasonable data security practices, sign contracts with processors that handle data for them, and assess higher-risk processing. The Attorney General enforces it, with a 30-day cure period and civil penalties of up to $7,500 per violation. Separately, Business and Commerce Code 521.053 requires breach notice to individuals within 60 days and, for incidents touching at least 250 Texas residents, an electronic report to the Attorney General within 30 days. Our program produces the records that show reasonable practices: access reviews, MFA reports, patch and scan history, backup tests and an incident response plan. This is general information, not legal advice.

What is included

Cybersecurity in Dallas: 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

Firewall, antivirus and maintenance for a five-person office

A five-person office needed the basics done properly rather than an enterprise stack. NetSys replaced the internet provider's router with a business-grade firewall configured with sensible rules, secure remote access and logging, deployed managed antivirus on every machine with updates and alerts handled centrally, and put patching, backup checks and health reviews on a schedule. The agreement covers what the office needs and nothing it does not, month to month. No outcome figures were measured for publication.

Read the full case study (5-person office)

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 Dallas client.

What cybersecurity costs in Dallas

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 Dallas: FAQs

Is NetSys a cybersecurity company that works with Dallas businesses?

Yes. NetSys has delivered IT and security services since 1998 from one office in Park Slope, Brooklyn, and protects Dallas organizations remotely. The work is done by engineers whose degrees are in computer science, electrical engineering and electronics engineering, certified in Cisco and Microsoft, using ThreatDown, Microsoft Defender, Entra ID, Barracuda, Rapid7, KnowBe4 and Keeper. Over the past three years, our engineers have worked more than 30 ransomware cases, with full recovery in each. Agreements run month to month.

How does cybersecurity work for Dallas organizations?

It is delivered remotely. Agents on your computers and servers feed ThreatDown's security operations center, which watches and contains threats around the clock, and our engineers manage identity, email security, patching and vulnerability scans from Brooklyn. Staff report a suspicious email or a locked account to the help desk from 3 a.m. to 10 p.m. Central, and incidents reach your dedicated engineer at any hour. None of it requires an engineer on site in Dallas, and none is sent.

What do cybersecurity services in Dallas cost?

Managed cybersecurity costs a per-user monthly amount, fixed after we assess your environment, either on its own or inside a managed IT agreement. The price moves with the number of endpoints and servers, the managed detection coverage you choose, how many firewalls and sites you have, and the compliance reporting your regulator, auditor or insurer expects. One-off work such as an incident response plan, a Regulation S-P gap review or remediation after a penetration test is quoted after scoping. We do not publish NetSys prices.

What does the free external penetration test include?

It is a remote test of your internet-facing systems within a scope we agree in writing, usually your public IP addresses, firewall, VPN, email and web services. Our engineers look for what an outside attacker would find: open ports, outdated firmware such as the FortiOS flaws CISA has tied to Play ransomware, weak VPN settings and exposed admin pages. You receive a report that ranks each finding and explains the fix. It is not an internal test or a full review of your network, and there is no obligation afterwards.

Do we need a security assessment before signing up?

Yes, because it sets both the scope and the price. We review your Microsoft 365 security settings, endpoint coverage, firewall configuration, backup status, admin accounts and service accounts, and compare them with the rules that apply to you, such as Regulation S-P, HIPAA or the Texas privacy act. You get a written list of gaps ranked by risk and a proposal to close them. If you already have a provider, the findings are yours to use either way.

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