Managed IT Services in Harrison, NY
For offices on Westchester Avenue, in Purchase and along Halstead Avenue, NetSys runs the whole IT environment: laptops and servers, Microsoft 365, the network, backups, security and the vendors behind them. Engineers drive up from our Park Slope office when a job needs hands; everything else is handled remotely, on month-to-month terms.
The short answer
NetSys provides managed IT services in Harrison, NY, taking responsibility for monitoring, patching, endpoint security, Microsoft 365, the office network, backups and the calls to your software, phone and internet vendors. Harrison is inside our on-site area, about 39 miles by road from our Brooklyn office, so engineers come to Purchase, West Harrison and downtown offices for installs, moves and hands-on repairs, while most issues are fixed remotely first. 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. Fees are per user per month, set after an assessment.
Service information by The NetSys Group. Our editorial standards.
How managed IT is delivered in Harrison
Harrison is about 39 miles from 1 Prospect Park SW, roughly 65 minutes by car when I-95 and the Hutchinson River Parkway are moving, and engineers can also ride the New Haven Line to Harrison station. On-site days cover the work remote tools cannot do: mounting a new firewall, replacing switches, wiring a conference room, setting up desks before a start date and moving an office down Westchester Avenue. Everything else starts remotely. NinjaOne watches every enrolled server and laptop, IT Glue holds the diagrams, passwords and vendor contacts, and a ticket logged before the morning commute is usually in an engineer's hands long before anyone could reach the Cross Westchester Expressway. Each client has a dedicated account manager with a real cell number, and ransomware, a dead circuit or an email outage goes straight to the client's dedicated engineer. 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, seven days a week. The proposal states severe-incident escalation, authorized remediation and any other after-hours work.
Purchase campuses, Westchester Avenue suites and the firms around them
Harrison is a combined town and village, and its northern hamlet of Purchase carries most of the corporate weight. PepsiCo lists its principal offices at 700 Anderson Hill Road and Mastercard at 2000 Purchase Street, Atlas Air and Central National-Gottesman are also based in Purchase, and Purchase College and Manhattanville University sit nearby. Companies of that size employ their own IT departments, and none of them is a NetSys client. The firms that hire a managed provider are the ones around them: payments and software consultancies, wealth managers and insurance brokers, law and accounting offices, medical practices, aviation service businesses near Westchester County Airport, and the 10 to 150 person companies leasing floors along Westchester Avenue. Their needs line up: one owner for the environment, clean onboarding when a contractor becomes an employee, and records that pass a large customer's vendor security review.
What one managed agreement covers in a Harrison office
The agreement puts every moving part under one team. Laptops are enrolled in Intune and Windows Autopilot, protected by ThreatDown EDR with managed detection behind it, and patched on a schedule you can read in a monthly report. Microsoft 365 gets Entra ID Conditional Access, Barracuda email filtering and a backup of its own. Datto SIRIS or Veeam protects servers and file shares, and a Cisco Meraki or Fortinet firewall runs the edge. We also take the vendor calls nobody in the office wants to make: the carrier when the circuit drops, the copier lease, the phone system and the support line for your line-of-business application. Lifecycle planning is part of it. Windows 10 support ended on October 14, 2025, and Windows Server 2016 reaches the end of extended support on January 12, 2027, so any server still running it gets a replacement plan and a budget line ahead of that date.
Blind Brook, storms and keeping a Harrison office open
Flash flooding is the local design case. When the remnants of Ida arrived on the night of September 1, 2021, Blind Brook left its banks onto Lincoln Avenue in Purchase and Harrison police confirmed a storm death there; Westchester was then included in federal disaster declaration DR-4615. Tropical Storm Isaias a year earlier brought declaration DR-4567, and the County Executive said full power restoration took a week or more. Cyber incidents reach Westchester institutions too: in April 2022 the Westchester Library System took most public computers offline after a ransomware attack and restored them in full, saying no patron data was compromised. For a Harrison office the response is practical: a battery backup sized for the network closet, cellular failover on the firewall, backups held off site, managed laptops staff can take home, and a restore test with a date on it.
The first 30 days with NetSys in Harrison
Week one is discovery, and most of it happens at your office: an engineer walks the closet, labels the circuits, lists every device and account, and collects the admin credentials from the outgoing provider. In week two, NinjaOne and ThreatDown agents go onto every machine, the IT Glue documentation is written, and Microsoft 365 is brought to a baseline with multifactor authentication on every account and legacy sign-in methods switched off. Week three proves the backups with a real restore and fixes what the inventory turned up, often an expired firewall license or a mailbox that belonged to someone who left. By week four staff have one number to call, KnowBe4 has sent a baseline phishing test, and the account manager walks leadership through what was found, what was fixed and what still needs a budget decision.
Managed IT Services in Harrison: what NetSys delivers
Help desk and monitoring
- Unlimited help desk by phone, email and Teams, staffed by engineers rather than a ticket queue, with severe problems such as ransomware, systems down, no internet or email not working answered immediately by your dedicated engineer
- 24/7 monitoring of every server, workstation and firewall through NinjaOne RMM, with alerts an engineer acts on rather than forwards
Security, built in
- ThreatDown managed detection and response with EDR agents on every device, not just servers
- Microsoft Defender for Business, Entra ID Conditional Access and multifactor authentication across the Microsoft 365 tenant
Backups, devices and vendors
- Datto SIRIS or Veeam backups with immutable off-site copies, and live restores run on the schedule in the agreement with the result sent to you
- Intune and Windows Autopilot device management, so a new laptop ships sealed and configures itself at first sign-in
Complete managed IT, cybersecurity and help desk for a 20-seat organization
A 20-seat organization handed NetSys the whole of its IT. Devices, network, Microsoft 365 and vendors came under one agreement with 24/7 monitoring and a named account manager; endpoint protection, multifactor authentication, email protection and tested backups went onto all twenty seats; staff got a help desk with engineers on the other end; and every new hire now goes through a defined onboarding process with recurring phishing training. The write-up is limited to the scope delivered, with no outcome figures claimed.
Managed IT services work for other clients
- Auto dealers
Independent automotive dealership group
IT support across 5 dealerships, management of 95 computers, email security, and software license consolidation.
Client names are withheld. These examples were chosen for the work involved, not for where the client is, so none is presented as a Harrison client.
What managed IT costs in Harrison
Managed IT is priced per user per month for a fully managed agreement, and the number moves with four things more than with headcount: how many servers you run, whether you need after-hours coverage beyond monitoring, how much compliance documentation you carry, and whether we are co-managing alongside an internal person or running everything. We quote from an assessment, not a phone call, and the agreement runs month to month. What belongs in the monthly fee versus what is billed separately is set out on our managed IT pricing page.
Who this fits, and who it does not
Best fit: 10 to 75 employees, one or two offices plus remote staff, already on Microsoft 365 or ready to move there, and either no internal IT or one person who is underwater.
Read next
Industry pages: IT for Financial Services · IT for RIAs & Wealth Management
Terms used on this page: Co-Managed IT · Managed Service Provider (MSP) · Remote Monitoring and Management (RMM)
Guides: the questions to ask before signing with an MSP · what managed IT costs per user in 2026
Related pages
Read the full Managed IT Services service page. See everything NetSys delivers in Westchester County.
Managed IT Services elsewhere: New Rochelle · New York City · New Jersey · Philadelphia · Long Island · Manhattan
Related services: Co-Managed IT · Managed IT Pricing & Scope · Switching Managed IT Providers · Outsourced IT Help Desk
Managed IT Services in Harrison: FAQs
Do you provide on-site managed IT services in Harrison, NY?
Yes. Harrison, Purchase and West Harrison are inside our on-site area, about 39 miles by road from our Brooklyn office. Engineers come to your office for firewall and switch installs, cabling, new-hire desk setups, conference rooms and office moves, and they are there in person for the discovery walk-through at the start. Day-to-day requests are handled remotely first because that is faster for your staff. Severe problems such as ransomware or a failed circuit go straight to your dedicated engineer, who decides whether the fix needs a trip up I-95.
How much do managed IT services cost in Harrison, NY?
Managed IT is priced per user per month, and we set the figure after an assessment rather than publishing a rate card that would not fit your office. The number moves with headcount, the servers and locations in scope, the security tools and Microsoft licenses you already own, and any compliance evidence you have to produce for clients or regulators. Projects such as a server replacement or an office move are quoted separately once they are scoped. Agreements run month to month, so there is no long-term contract to sign.
What is included in a managed IT plan for a business in Harrison?
Monitoring and patching of every enrolled device, endpoint detection and response, Microsoft 365 administration and backup, email filtering, firewall and Wi-Fi management, server and file backups with tested restores, onboarding and offboarding of users, and vendor management for your carrier, phones, printers and business applications. The help desk answers your staff directly, and a dedicated account manager runs quarterly reviews covering open risks, aging hardware and next year's budget. KnowBe4 security awareness training and Keeper password management can be added for every user.
Which New York rules shape managed IT for a Harrison firm?
The SHIELD Act (General Business Law section 899-bb) expects any business holding New York residents' private information to keep reasonable administrative, technical and physical safeguards, scaled to its size. Insurance brokers, mortgage firms and other businesses licensed by the Department of Financial Services also fall under 23 NYCRR Part 500, which calls for a written cybersecurity program, multifactor authentication and incident reporting. SEC-registered advisers add Regulation S-P. A managed agreement produces the evidence those rules ask about: access reviews, patch reports, backup tests and an incident response plan. This is general information, not legal advice.
We have one IT person in Harrison. Can you work alongside them?
Yes, as a co-managed arrangement. Your IT person keeps the projects and relationships they know best, and NetSys takes the monitoring, patching, security stack, backups and the after-hours escalation that should not depend on one person's phone. Both sides work from the same IT Glue documentation and the same ticket queue, so nobody has to guess who owns a problem. When your person is on vacation, the help desk and your dedicated engineer cover the gap, and the split is reviewed whenever staffing or systems change.
Get the whole of your IT handled by one accountable team.
Tell us how many people and devices you have, what you run today and what keeps breaking. We come back with a written scope, the responsibilities on each side and a monthly figure, before you decide anything.