Cybersecurity Services in San Antonio
NetSys provides cybersecurity services to businesses in San Antonio: 24/7 managed detection and response on every device, identity and email protection across Microsoft 365, vulnerability scanning, staff training and immutable backups, with an engineer acting on alerts rather than forwarding them. San Antonio is served from Brooklyn, one hour behind us on Central time. Monitoring, help desk and remediation run remotely around the clock from Brooklyn, with coverage hours stated in Central time in the proposal. On-site commitments are arranged in advance and sized to the engagement. Most clients run between 10 and 75 seats, and every agreement is month to month.
The short answer
NetSys provides cybersecurity to businesses in San Antonio: ThreatDown managed detection and response on every device, multifactor authentication and Conditional Access across Microsoft 365, Barracuda email protection, Rapid7 vulnerability scanning, security awareness training and immutable backups with tested restores. Delivery is remote-first from Brooklyn, with coverage hours stated in Central time, and on-site commitments are arranged in advance and sized to the engagement, up to a dedicated engineer with a drive time generally under an hour where regular presence is part of the scope. Most clients run between 10 and 75 seats, and every agreement is month to month.
How cybersecurity is delivered in San Antonio
San Antonio is served from Brooklyn, one hour behind us on Central time. Monitoring, help desk and remediation run remotely around the clock from Brooklyn, with coverage hours stated in Central time in the proposal. On-site commitments outside the tri-state area are arranged in advance and sized to the engagement: a mostly remote engagement needs no dedicated on-site engineer, while an engagement that calls for regular presence, such as vCISO work with someone on site two days a week, gets a dedicated engineer whose drive time is generally under an hour, depending on where that engineer and your office are. Hardware ships pre-configured, so most projects need no visit at all. The buildings decide a lot of the design. Downtown and the Medical Center have carrier choice, but Stone Oak and Port San Antonio offices often run on one Spectrum circuit, and the military-contracting base means CMMC 2.0 shapes more networks here than anywhere else in Texas. The carriers we see most in San Antonio are Spectrum Business, AT&T Business Fiber and Google Fiber, and the failover design starts with which of them actually reach your building.
Who cybersecurity in San Antonio is built for
Most of our San Antonio work sits in Downtown San Antonio, the Medical Center, Stone Oak, Port San Antonio and the Pearl: defense and cybersecurity contractors on Deltek Costpoint, medical practices on eClinicalWorks, financial and insurance firms on Applied Epic, manufacturers on Epicor, contractors on Procore, and hospitality businesses on Toast. Each carries its own compliance load, which the section below covers, and each has a line-of-business vendor we coordinate with rather than work around. Companies with an internal IT person fit too; in that case we supply the monitoring, the security stack and the after-hours coverage behind them, and they keep their projects.
What tends to go wrong in San Antonio
Two things shape the continuity design here. First, the weather and the grid: the February 2021 ERCOT grid failure and flash flooding are the recurring outages, so UPS runtime and out-of-state backups are the design case. Second, the attacks that actually land locally are ordinary ones, and the public record shows how they go: the August 2019 coordinated ransomware attack on 23 Texas local governments, which the state traced to a single managed service provider's remote-management tool. The controls in the next section are the ones that would have changed those stories.
Cybersecurity in San Antonio: what NetSys delivers
Detection and response
- ThreatDown managed detection and response with EDR agents on every workstation, laptop and server, monitored 24/7
- Microsoft Defender for Business and Rapid7 InsightIDR telemetry from identities, email and endpoints, with a person acting on alerts
- Isolation of a compromised device in real time, with an engineer on the case rather than a ticket in a queue
- Incident investigation and a written timeline for leadership, counsel and your insurer
Identity and email
- Entra ID Conditional Access and multifactor authentication across Microsoft 365, with legacy authentication switched off
- Privileged access and privileged identity management so admin rights are granted just in time and removed afterwards
- Barracuda Email Protection in front of every mailbox, with SPF, DKIM and DMARC enforced
- KnowBe4 security awareness training with simulated phishing built from the lures your industry receives
Exposure and recovery
- Rapid7 InsightVM vulnerability scanning on a schedule, with findings fixed rather than filed
- Cisco Meraki or Fortinet firewall management, segmentation and DNS filtering on office and remote devices
- Immutable backups through Datto SIRIS or Veeam, with restores tested and documented
- The free remote external penetration test, limited to available information and the external scope agreed with you
A 12-person financial or insurance firm in the Medical Center
The specific engagements behind this profile are under NDA, so it is written as a generalization rather than a named client. Our published, client-approved outcomes are in case studies.
A 12-seat financial and insurance firms in the Medical Center that handles regulated data in Applied Epic across the office and remote staff on home Wi-Fi. The cyber insurer asked for evidence of MFA and endpoint detection before renewal, and nobody has it. Email protection is whatever Microsoft ships by default, DMARC was never set up, the Spectrum Business firewall is a consumer router, and the last security training anyone remembers was a poster.
- Monthly review of dormant accounts, forwarding rules, consent grants and administrator assignments, reported in writing
- Microsoft 365 investigation: sign-in logs, forwarding rules and consent grants reviewed to establish whether a mailbox was compromised, then multifactor authentication and Entra ID Conditional Access enforced for every account
- Rapid7 InsightVM deployed for scheduled vulnerability scanning, with the first month's findings prioritized and closed
- Datto SIRIS backups with immutable cloud copies for the servers and a Microsoft 365 backup for the tenant, with a restore tested and the result written down for the insurer
- Rapid7 InsightIDR collecting identity, email, endpoint and firewall logs so an intrusion is visible in one console
- Keeper password management deployed and shared credentials rotated, starting with the ones in the spreadsheet
The exposure is measured monthly and closed, the people are trained against the lures they actually receive, and an incident has a plan with names on it. Leadership sees a written report every month. Terms stay month to month.
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.
Compliance in San Antonio: § 521.053 and what sits on top of it
If you hold personal information on a resident of Texas, Texas Business and Commerce Code § 521.053 requires notice to affected residents within 60 days of determining a breach occurred and, when 250 or more Texans are affected, notice to the Attorney General within 30 days. The Texas Data Privacy and Security Act, in force since July 1, 2024, adds data-protection assessments and consumer rights for businesses above the small-business threshold, and Texas HB 300 tightens health-information handling beyond HIPAA. Healthcare practices carry HIPAA and HB 300, energy and industrial firms answer to customer and insurer questionnaires, and defense suppliers face CMMC 2.0. The security service is built to produce the evidence those rules ask for: multifactor authentication and Conditional Access reports, endpoint detection coverage, vulnerability scan results, backup restore records and a tested incident response plan. Most firms we take over have none of it documented, which is the part that matters if you ever have to demonstrate compliance, so the documentation is built during onboarding rather than sold as a separate project.
What cybersecurity costs in San Antonio
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, whether 24/7 response is needed beyond monitoring, 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.
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.
Not a fit: organizations that want a security product installed and left alone. The service is monitored, reviewed and reported monthly, and it changes the way administrators, finance staff and vendors work. If that is not wanted, a tool purchase serves better than an engagement.
Read next
Industry pages: IT for Government Contractors · IT for Healthcare
Terms used on this page: Managed Detection and Response (MDR) · Endpoint Detection and Response (EDR) · Conditional Access
Guides: MDR versus antivirus for a small business · the Conditional Access policies to turn on first
Related pages
Read the full Cyber Security service page. See all locations and service areas.
Also in San Antonio: Managed IT Services · IT Consulting · IT Support
Cybersecurity elsewhere: Houston · Dallas · Austin · New York City · Brooklyn, NY · Nassau County, NY
Related services: Penetration Testing · Cyber Insurance Readiness · Security Assessments · Managed Detection & Response (MDR)
Cybersecurity in San Antonio: FAQs
Do we need a security assessment before signing up?
The free external test is where most engagements start. A fuller assessment of the tenant, devices, network and backups is scoped separately and produces a prioritized fix list that becomes the first ninety days of the service.
What does the free external penetration test include?
The free offer is a remote external penetration test, limited to the information available to NetSys and the external scope agreed with you. It examines what your business shows the internet and reports the findings with their scope and limitations stated. Reviews of tenant settings, devices, internal networks or backups need a separate scope.
Will cybersecurity services help us pass a cyber insurance questionnaire?
Yes. Multifactor authentication, endpoint detection and response, tested offline backups and security awareness training are the four controls almost every questionnaire asks about, and the service produces the evidence for each. Our cyber insurance readiness page lists what carriers are asking for in 2026.
Do you have an office in San Antonio?
Our office is in Brooklyn, NY. San Antonio is served from Brooklyn, one hour behind us on Central time. Outside the tri-state area the on-site arrangement is agreed before the engagement starts and sized to what it needs: none for a mostly remote account, and a dedicated engineer, generally within an hour's drive, where regular presence such as vCISO work with someone on site two days a week is part of the scope. The proposal states that arrangement, coverage hours in Central time and any travel in writing, and the agreement runs month to month.
What does Texas require after a data breach?
§ 521.053 gives a business 60 days from determining a breach occurred to notify affected residents, and 250 or more affected Texans means the Attorney General must be told within 30 days. Texas HB 300 adds stricter rules for health information. Logs, encryption and a written response plan are how a small business meets the deadlines.
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.