Cybersecurity · Brooklyn, NY

Cyber Security Brooklyn: Managed Protection From Our Park Slope Office

NetSys provides cybersecurity services in Brooklyn, NY: managed detection and response, Microsoft 365 identity and email protection, staff training and tested backups. Our Brooklyn team scopes the systems, response responsibilities and on-site work you need, with month-to-month terms.

All IT services in Brooklyn, NY

The short answer

NetSys provides cybersecurity services to Brooklyn businesses from its headquarters in Park Slope, the company's only office. The stack is the same one we run for every client: 24/7 monitoring with an engineer acting on alerts, managed detection and response on every workstation and server, multifactor authentication and Conditional Access on Microsoft 365, email and phishing protection, security awareness training, privileged access and privileged identity management, and immutable backups with restores we test. The free offer is a remote external penetration test, limited to the information available to NetSys and the external scope agreed with you. On-site work anywhere in the borough is the shortest trip we make for anyone. Agreements run month to month, and your account manager answers a real cell phone.

Service information by The NetSys Group. Our editorial standards.

Cybersecurity risk in Brooklyn's business mix

Brooklyn runs on medical and dental offices, professional practices, creative and production companies, food and goods businesses moving physical inventory, and importers working around the ports. Most of them share two traits: thin or absent internal IT, and data or money worth stealing. A production company keeps client footage on a NAS that freelancers reach over a shared Wi-Fi password. A food distributor pays suppliers from an inbox that has never seen multifactor authentication. A dental group stores patient records under HIPAA on workstations protected by consumer antivirus. Attackers work those seams with invoice fraud, payroll diversion and ransomware that spreads across a flat network in a converted industrial building. The SHIELD Act, HIPAA and PCI DSS add regulatory weight, and insurers add their own conditions at renewal.

How cybersecurity is delivered from Park Slope

Detection and response run remotely and never sleep: endpoint agents, identity logs, email flow and network telemetry feed a monitoring stack our engineers watch around the clock. What makes Brooklyn different is proximity. When a machine needs to be pulled off the network, a firewall swapped, or a security walkthrough done before a lease is signed, the engineer is coming from Prospect Park rather than from another state, and there is no travel premium for it. The free offer is a remote external penetration test, limited to the information available to NetSys and the external scope agreed with you. Reviews of Microsoft 365 tenant settings, devices, internal networks, backups or compliance evidence require a separate scope. From that we write a prioritized fix list and a plain statement of what we take over. Terms are month to month from the first day.

Who this fits in Brooklyn

Businesses that have outgrown a local computer shop or a break-fix arrangement and want a security team without hiring one: medical and dental practices with patient data, law and accounting firms, design studios and production companies with freelancers on personal laptops, food businesses and importers with supplier payments to protect, and nonprofits with donor records. A company that already employs an IT person fits as a co-managed arrangement, where we take the monitoring, the security stack and the after-hours calls. If you are opening a second location in the borough, the identity and network design should be done once, before the move, rather than repaired afterwards.

What is included

Cybersecurity in Brooklyn, NY: what NetSys delivers

Monitoring and response

24/7 monitoring across endpoints, Microsoft 365 identities, email and the office network
Managed detection and response replacing consumer antivirus on every device
Immediate isolation of an infected machine, followed by investigation and cleanup
Incident timeline and root-cause report for leadership and your insurer
A dedicated account manager reachable on a real cell number during an incident

Accounts and privileges

Multifactor authentication and Conditional Access enforced across the tenant
Shared logins replaced with individual accounts so access is attributable to a person
Privileged access management for the accounts that can change everything
Privileged identity management with time-limited admin rights

Email and staff

Phishing and malware filtering ahead of every mailbox
Email authentication records set so your domain cannot be impersonated
Security awareness training built around the lures Brooklyn businesses see: fake invoices, payroll changes, delivery notices
DNS filtering on office, warehouse and remote devices

Backups and testing

Immutable backups for servers, workstations and Microsoft 365
Scheduled restore tests with the results documented
Free remote external penetration test limited to available information and agreed external scope; findings state the scope and limitations
Tier 2 source code penetration testing for businesses that ship software, quoted per codebase

Illustrative engagement

A production company in a converted Brooklyn warehouse

This planning example shows how we could scope the work. It is not a claim about a customer in this market or a measured result. For published customer work, see our case studies.

Forty people on payroll and twice that many freelancers across a year, all working off a shared Wi-Fi password and a file server full of client footage. Freelancers bring personal laptops. The owner found out a competitor had paid a ransom and started asking questions. Payroll is handled by a bookkeeper who recently received a convincing request to change an employee's direct deposit account.

Free remote external penetration test limited to information available to NetSys and the external scope agreed with the business; any internal investigation or remediation below is scoped separately
Wi-Fi rebuilt with individual authentication for staff and a separate guest and freelancer network that cannot reach the file server
Managed detection and response on every company device, with a conditional-access rule that keeps unmanaged personal laptops out of the tenant
Phishing protection and a payroll-change verification procedure the bookkeeper follows every time, plus awareness training for the whole crew
Immutable backups of the footage archive and Microsoft 365, with a restore of a project folder tested and timed

Freelancers still get their work done, but from a network that cannot reach the archive, and a fake payroll request now dies at a phone call. The owner can see what is protected in plain language, and the engineer who set it up works a short trip away. The agreement runs month to month.

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
Wealth management
RIA firm
Barracuda email protection for 117 licensed users, email archiving, cybersecurity monitoring, and account access management.
Cybersecurity for Financial Services IT for RIAs and Wealth Management
Healthcare
Home healthcare agency
Mobile device protection for 73 phones and tablets, secure email access, and remote removal of company data from lost devices.
Mobile Device Management IT for Healthcare

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

Compliance in Brooklyn: the SHIELD Act and what sits on top of it

The New York SHIELD Act (General Business Law § 899-bb) requires reasonable administrative, technical and physical safeguards for covered private information. The small-business standard considers the size and complexity of the business and the sensitivity of the information; it is not a general small-business exemption. The service scope should identify the records, access controls, retention settings and incident evidence your business needs; your legal or compliance adviser determines which requirements apply. 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. Discovery identifies missing records and assigns the documentation work. Applicable duties depend on the business, data, exemptions and contracts; your legal or compliance adviser determines which requirements apply.

Primary sources

New York Attorney General: SHIELD Act

What cybersecurity costs in Brooklyn

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.

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.

Cybersecurity in Brooklyn, NY: FAQs

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 is not an on-site visit or a full internal audit. Reviews of Microsoft 365 tenant settings, devices, internal networks, backups or compliance evidence require a separate scope. The findings state what was assessed and the limits of that assessment.

Who provides cybersecurity services in Brooklyn?

The NetSys Group, headquartered at 1 Prospect Park SW in Park Slope, provides managed cybersecurity to businesses across Brooklyn. The service includes 24/7 monitoring, managed detection and response on every device, multifactor authentication with Conditional Access, phishing protection, security awareness training, privileged access management and immutable backups with tested restores. It opens with a free remote external penetration test, and the agreement is month to month. Brooklyn is our home borough, so on-site work here is the shortest trip we make.

Is there a cybersecurity company based in Brooklyn?

Yes. NetSys has been headquartered in Brooklyn since 1998, and the Park Slope office is the company's only location. That matters for two reasons. Engineers who work on your systems remotely are the same people who come to your office, and there is no travel surcharge for a borough we live and work in. Other providers will drive to Brooklyn; we start here.

How quickly can an engineer get to my Brooklyn office during an incident?

Remote response starts the moment an alert fires, because isolating a compromised machine does not require anyone to travel. When hands are needed, the trip from Prospect Park to most of the borough is short, though we will not promise a number of minutes that traffic could make a lie. What we will say is that on-site work in Brooklyn is routine for us and carries no premium.

What does cybersecurity for a Brooklyn medical or dental practice include?

Attributable access to patient records, which means individual accounts with multifactor authentication instead of a shared front-desk login. Managed detection and response on every workstation that touches the practice-management system. Phishing protection and staff training, since most practice breaches begin with an email. Encrypted, immutable backups with restores tested against a real recovery-time target, and documentation of all of it in a form that supports your HIPAA risk analysis and your insurer's questions.

Can you secure freelancers and personal devices that connect to our network?

Yes, and it usually comes down to two controls. Conditional Access policies decide what an unmanaged device can reach in Microsoft 365, so a personal laptop can join a Teams call without opening the whole tenant. Network segmentation gives freelancers and guests their own Wi-Fi that cannot see the file server or the office workstations. Where a freelancer needs deeper access, we issue a managed device or a controlled remote session rather than a password.

Do we need cybersecurity services if we already have antivirus and a firewall?

Antivirus and a firewall are two layers out of the six or seven that stop modern attacks, and neither of them helps when someone hands over a password on a phishing page. Managed cybersecurity adds the pieces that catch what those miss: identity controls, continuous monitoring with a person responding, phishing filtering, staff training and an immutable backup for the day something gets through. The free remote external test reports findings within its agreed external scope; internal controls and broader business risks need a separate review.

How much do cybersecurity services cost for a Brooklyn business?

NetSys prices cybersecurity per user per month, quoted from what is actually in place, and the external penetration test that starts most engagements is free. For Brooklyn firms the count grows with freelancers and personal devices that need access, the number of sites, and whether Microsoft 365 is already on Business Premium. Remediation projects are quoted separately.

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