Long Island IT Services and Cybersecurity, Nassau to Suffolk

One Long Island business can run an office in Garden City, a warehouse in Hauppauge and staff working from home in both counties. NetSys provides managed IT services and cybersecurity across that footprint from our Brooklyn office: one help desk, one security standard and one set of documentation, with engineers who come on site in Nassau and western Suffolk when the work needs hands.

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The short answer

NetSys provides managed IT services, IT support, cybersecurity and IT consulting to businesses across Long Island from its only office, in Park Slope, Brooklyn. Nassau County and western Suffolk are inside our on-site coverage, 45 to 90 minutes away by car: the help desk resolves most issues remotely, and engineers come to your office for cabling, network equipment, hardware and moves. Around Patchogue and Port Jefferson, 50 to 60 miles out, we confirm drive time before scheduling a visit, and the East End from Riverhead to Montauk and Orient is supported remotely. Ongoing support is priced per user per month after an assessment, and agreements run month to month.

One office, in Brooklyn, NY; Nassau and western Suffolk are inside our on-site coverage, 45 to 90 minutes away by car
Patchogue and Port Jefferson are 50 to 60 miles out, so drive time is confirmed first; the East End is supported remotely
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
Month-to-month agreements and 98% client retention

We’re a member here

We hold memberships in the local business organizations covering Long Island, NY, so you can check us out in someone else’s directory instead of taking this page’s word for it. Membership is an affiliation, not an endorsement of our work.

Melville Chamber of Commerce · Melville, NY
Farmingdale Chamber of Commerce · Farmingdale, NY

What one IT provider handles across Nassau and Suffolk

A business with sites in both counties needs to know which systems are shared and which belong to one building. We start with identity, Microsoft 365, line-of-business applications and data, then document each location's circuit, firewall, switches, Wi-Fi, printers and vendors in IT Glue. From there NetSys acts as the IT department: the help desk staff call, device management through NinjaOne and Intune, security tools, backups, and the carriers and software vendors behind them. A common standard does not mean identical equipment; a Melville office and a Hauppauge warehouse need different networks under the same rules. Each part of the work has its own Long Island page: managed IT for the whole environment and its vendors, IT support for the help desk and devices, cybersecurity and network security for threats and controls, and IT consulting for migrations and projects. The Nassau County and Suffolk County pages add detail for each county.

How on-site and remote support reach each part of the Island

From Park Slope, the Belt Parkway, the Cross Island or the Long Island Expressway put an engineer in Garden City, Mineola or Great Neck in about 45 minutes to an hour, and in Melville, Huntington or Hauppauge in 60 to 90, depending on traffic. We schedule visits rather than promising arrival times by distance. Most support never needs the drive: NinjaOne monitors and patches every device, the help desk works through remote sessions, and Microsoft 365 is administered from anywhere. Visits cover cabling, failed switches and firewalls, new desks, office moves and the walkthrough that opens every engagement. Farther east the model changes. Patchogue and Port Jefferson sit 50 to 60 miles out, so offices there are supported remotely first and we confirm drive time before booking a visit. Riverhead, the North Fork and the South Fork are beyond our radius: hardware ships pre-configured through Windows Autopilot, and a local cabling contractor handles physical work.

Corridors, employers and the industries that run on them

Long Island business sorts into corridors more than downtowns. Route 110 through Melville holds Canon's Americas headquarters at One Canon Park and Henry Schein's head office on Duryea Road. The Hauppauge Industrial Park, about 1,350 businesses and 55,000 employees by a 2017 study, mixes defense suppliers, electronics assemblers and distributors. Garden City and Mineola sit around the county courts and NYU Langone Hospital Long Island, RXR Plaza anchors Uniondale, and Lake Success and New Hyde Park surround Northwell Health's headquarters. Finance has deep roots: Flagstar is based in Hicksville, Dime Community Bancshares in Hauppauge and FourLeaf Federal Credit Union in Bethpage. Around them work the industries with their own Long Island pages: medical offices, urgent care centers and clinic groups, manufacturers on defense contracts, logistics firms, financial and wealth management firms, architecture and engineering offices, and professional services firms. Each runs a different stack, from an EHR and imaging to an ERP and shop-floor PCs.

Storms, power and recovery planning on Long Island

Weather on the Island hits power, roads and ground floors. Sandy flooded the South Shore in 2012, and Nassau and Suffolk were both in the federal declarations after Sandy and after the remnants of Ida in 2021. Tropical Storm Isaias caused about 645,000 customer outages in August 2020, and LIPA's own timeline says full restoration took eight days. Islip MacArthur Airport logged 13.57 inches of rain on August 12 and 13, 2014, a state record, and on August 18 and 19, 2024 a storm the governor called a 1-in-1,000-year event washed out roads around Stony Brook and broke the Mill Pond dam. Recovery planning here is concrete: move servers out of basements or into Azure, put battery backup behind the firewall, add cellular failover, keep immutable backups off site and prove them with restores. A second office helps only when its circuit, permissions and capacity were tested before the outage. NetSys has handled more than 30 ransomware incidents in three years and recovered every one.

Ransomware close to home, and the rules that follow the data

Long Island has had its own warnings. In July 2019 the Rockville Centre school district paid about $88,000, mostly through insurance, after Ryuk ransomware encrypted its servers, while Mineola, hit by the same strain, restored from offline backups. In September 2022 attackers who had exploited a Log4j flaw in the Suffolk County Clerk's systems months earlier encrypted county data; the main county website stayed down for five months, and the cost passed $25 million. The legal duties are clear enough to plan around. New York's SHIELD Act requires reasonable safeguards for private information and notice to affected residents within 30 days of discovering a breach, plus notice to the Attorney General, the Department of State and the State Police. Medical practices add HIPAA, lenders and insurers licensed by DFS add 23 NYCRR Part 500, and defense suppliers add DFARS 252.204-7012 and NIST SP 800-171. This is general information, not legal advice.

Choosing a managed IT services provider on Long Island

Ask every provider to quote against the same users, devices, sites and applications, and separate recurring support, security and backup from migrations, equipment and office projects. Check who holds the administrator accounts, where the documentation lives and what happens when you leave; our agreements run month to month, so the exit process matters as much as the start. A typical first 30 days with NetSys looks like this: a discovery visit to each Nassau and western Suffolk site, an inventory of accounts and devices, multifactor sign-in and endpoint protection rolled out to everyone, backups verified by a test restore, and a written list of what to fix next, ranked by risk. Staff notice a new help desk number and a sign-in prompt on their phones; little else changes in the first week. Our guide to choosing a managed IT provider on Long Island lists the questions to settle first, and the pricing page explains what moves the monthly figure.

Towns and neighborhoods we cover around Long Island, NY

Garden City
Mineola
Uniondale
Hempstead
Great Neck
Manhasset
Lake Success
New Hyde Park
Glen Cove
Glen Head
Greenvale
Jericho
Syosset
Hicksville
Bethpage
Farmingdale
Melville
Huntington
Hauppauge
Ronkonkoma

From our published case studies

Large International Food Importer

An extreme weather event cut this importer off from sources and clients worldwide. We rebuilt their entire platform in Microsoft Azure, and downtime effectively disappeared.

The published case study rebuilt the platform of a food importer with more than 120 employees and three warehouses in Microsoft Azure, after an extreme weather event cut it off from suppliers and clients. The client is described only as New York metro, so we do not present it as a Long Island engagement.

Read the case study

From our client work

Examples of our client work

Healthcare
Three-location urgent care group
IT support for 36 workstations, patient data backups, endpoint protection, and secure networking across all three locations.
IT Support IT for Healthcare
Manufacturing
Large manufacturing plant in Virginia
Password management for 125 employees, management of 160 computers, and managed EDR antivirus across production and office devices.
Password and Permissions Management IT for Manufacturing
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 Long Island, NY client.

What We Deliver Here

Services in Long Island, NY

Service pages for Long Island, NY

Common Questions

Long Island, NY FAQs

Do you provide on-site IT support on Long Island?

Yes. Nassau County and western Suffolk, roughly from the Queens line out to Hauppauge and Smithtown, are inside our on-site coverage, and engineers drive out from our Brooklyn office for cabling, network equipment, hardware, new offices and moves. Most tickets are solved remotely before a visit would help. Offices around Patchogue and Port Jefferson are 50 to 60 miles away, so we confirm drive time before scheduling anything there. Riverhead, the North Fork and the Hamptons are served remotely, with equipment shipped pre-configured.

Do you have a Long Island office?

No. Our only office is at 1 Prospect Park SW, Suite 6E, Brooklyn, NY 11215, in Park Slope, and Long Island is a service area. What matters for support is whether an engineer can reach your site, how quickly the help desk answers and who owns a severe incident. Severe problems such as ransomware, systems down or no internet go straight to your dedicated engineer, and your account manager has a real cell number. The county and regional pages describe coverage, not branch offices.

Should a business with sites in Nassau and Suffolk use one IT agreement?

Usually yes, when the sites share identity, Microsoft 365, applications, data or staff. One agreement gives one help desk, one security baseline and one recovery plan, and it stops two providers blaming each other when a link between offices fails. It should still name each site's carrier, equipment and local vendors, and say which work is recurring and which is a project. If one site is on the East End, the agreement states that it is supported remotely and how hardware reaches it.

What affects the cost of managed IT on Long Island?

Managed IT is priced per user per month after an assessment, and we do not publish a figure because the inputs vary too much. The main drivers are the number of users and devices, servers and cloud workloads, how many sites need network management, compliance requirements such as HIPAA or Part 500, backup volume and the amount of hands-on work at each Nassau and western Suffolk site. Projects like a server replacement or an office move are quoted separately after scoping. Compare quotes against the same inventory.

Which IT services can a Long Island business outsource, and can you work with our IT person?

Nearly all of it: the help desk, device and Microsoft 365 management, cybersecurity, backups and disaster recovery, network management and IT consulting for projects. Some companies hand over everything. Others keep an internal IT person and give us monitoring, security and overflow support on a co-managed basis, with agreed administrator access, approvals and escalation so each team knows who owns an issue. That split suits a Long Island firm whose IT lead sits in one office but supports several.

What network solutions do small businesses on Long Island need?

Usually four things: a managed Cisco Meraki or Fortinet firewall, business-grade Wi-Fi and switches, a second internet path that takes over on its own, and secure remote access for staff at home. On Long Island the carrier options to check at your address typically include Optimum Business, Verizon Fios and Lightpath fiber, and a cellular backup covers the outages storms bring. Multi-site firms add encrypted links between offices and warehouses. We design, install and monitor the network, then document it so nothing depends on one person.

Do you provide cybersecurity services in Glen Head and Greenvale?

Yes. Glen Head, Greenvale and the rest of Nassau's North Shore are inside our on-site coverage, about an hour from Park Slope. Offices there get the same managed security as anywhere on the Island: multifactor sign-in, ThreatDown detection and response monitored 24/7, Barracuda email filtering, KnowBe4 phishing training and immutable backups. A good starting point is our free external penetration test, a remote test of your internet-facing systems within a scope we agree in writing; it is the only free offer we make.

Does NetSys handle identity and access management for Long Island companies?

Yes. We run identity and access management in Microsoft 365 and Entra ID: single sign-on, multifactor authentication, Conditional Access policies that check the device and location, role-based permissions and joiner and leaver checklists. Keeper business password management and separate privileged accounts for administrators complete it. For a firm with staff spread from Great Neck to Smithtown, access follows each person's role, works the same from home or the office, and ends on their last day.

Plan Long Island support

Define support across your Long Island operation.

Tell us which Nassau and Suffolk locations share systems, what your internal team or vendors handle, and where the work sits. Book a call with an engineer to scope it.

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