Cybersecurity Services in Westchester County, NY
Westchester County is the corridor NetSys engineers drive every week, between our Brooklyn office and the Hudson Valley coverage area on the same 845 main line. The county's professional firms, wealth managers, medical practices and multi-location operators face the same attacks as Manhattan with smaller teams to absorb them. We provide cybersecurity services across Westchester: 24/7 monitoring, managed detection and response, multifactor authentication and Conditional Access, phishing protection, staff training and immutable backups, on month-to-month terms.
The short answer
NetSys provides managed cybersecurity to businesses across Westchester County, from Yonkers and New Rochelle through White Plains to the northern towns. The service includes 24/7 monitoring with an engineer acting on alerts, managed detection and response on every device, 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. It opens with a free Tier 1 external penetration test of your website, public systems, public-record exposure and phishing likelihood. Westchester sits inside our on-site coverage, between the Brooklyn headquarters and the lower Hudson Valley, so engineer visits are routine scheduling. Our only office is in Brooklyn. Agreements run month to month, with a dedicated account manager on a real cell number.
Cybersecurity risk in Westchester County
Westchester's businesses move money on trust. Registered investment advisers and wealth managers hold client account details under SEC rules, insurance agencies answer to NYDFS Part 500, law and accounting firms handle closings and tax data, and medical and dental practices carry HIPAA obligations on small headcounts. Attackers target that trust directly: an executive impersonation email to a controller, a wire-instruction change that arrives the day of a closing, a phishing page that harvests a Microsoft 365 session from a partner working on the train. Multi-location operators, fitness and retail among them, add the problem of several sites sharing one set of weak passwords. Insurers across the county now condition renewal on multifactor authentication, endpoint detection and offline backups, and the SHIELD Act applies to every business holding a New York resident's private information.
How cybersecurity services reach Westchester County
Monitoring, detection and response are remote and continuous, with endpoint agents, identity logs, email flow and network telemetry feeding a stack our engineers watch around the clock. The on-site work rides the corridor we already travel between Brooklyn and the Hudson Valley: firewall and network work in White Plains, an incident at a Yonkers office, a security walkthrough before a move in the northern part of the county. There is no satellite office to claim and none needed. The engagement begins with the free external penetration test and a review of identity, email, endpoints, network and backups as they stand, followed by a prioritized fix list and a written division of responsibility. Commuting staff who work from home part of the week are covered by the same device and Conditional Access controls as the office. Terms are month to month.
Who this fits in Westchester
Wealth managers and registered investment advisers preparing for an SEC exam, insurance agencies and brokers under NYDFS, law and accounting firms, medical and dental practices, and operators with a head office plus a warehouse, a second branch or a chain of locations. The common thread is regulated data or money movement without a security team. A firm with an internal IT person fits as a co-managed engagement, where we take the monitoring, the security stack and the after-hours coverage. A firm that needs security leadership without hiring an executive can add vCISO oversight on the same month-to-month terms. If a client questionnaire or an insurer's application has exposed gaps you cannot answer, the external test is where to start.
Cybersecurity in Westchester County, NY: what NetSys delivers
Monitoring and response
- 24/7 monitoring of endpoints, identities, email and network logs, with a person on the alert
- Managed detection and response on every workstation, laptop and server
- Isolation of a compromised device in real time and an investigation that finds the entry point
- Incident documentation written for regulators, counsel and insurers
Identity and privileged access
- MFA and Conditional Access policies enforced on Microsoft 365 and Entra ID
- Device compliance rules so a commuting partner's home laptop meets the same bar as the office
- Privileged access management for administrator and finance-system accounts
- Privileged identity management with just-in-time admin rights that expire
- Access reviews so departed advisers, agents and vendors lose access on schedule
Email and people
- Phishing and impersonation protection in front of every mailbox
- Email authentication so your domain cannot be used against your own clients
- Security awareness training with executive-impersonation and wire-change simulations
- Verification procedures for payment instructions and client account changes
Backups, testing and oversight
- Immutable backups for servers, workstations and Microsoft 365, with tested restores
- Free Tier 1 external penetration test to open the engagement
- Tier 2 source code testing in an isolated sandbox for firms that build software, quoted per codebase
- Optional vCISO oversight for firms that need a security program owner without a full-time hire
A Westchester wealth management firm ahead of an SEC exam
A composite example of work we do in Westchester County, NY, written so you can picture the first 90 days. It is not a specific client. Our real, anonymized engagements are in case studies.
A registered investment adviser with a handful of partners, a small operations team and a compliance consultant who has asked for the firm's written cybersecurity policies. Advisers work from home two days a week on personal laptops. A client recently called to confirm a wire request the firm never sent. The firm's email is on Microsoft 365, multifactor authentication is on for some accounts, and the last backup restore was never attempted.
- Free external penetration test covering the firm's website, client portal, email authentication and the public footprint an impersonator used to make the fake wire request credible
- Multifactor authentication and Conditional Access across every account, with advisers moved onto managed laptops that must be compliant before they can open client data
- Managed detection and response on every device, with 24/7 monitoring and an engineer responding to sign-in anomalies
- Phishing and impersonation protection, email authentication corrected, and a client-verification procedure for any money movement request
- Immutable backups with a tested restore, and written policies, access records and incident procedures assembled for the compliance consultant and the exam
The firm walks into the exam with policies that describe controls it can prove rather than controls it intends, advisers work from home on devices the firm governs, and a fake wire request now fails at a verification step instead of reaching a client. An engineer covers the firm at night. The agreement is month to month.
Related pages
Read the full Cyber Security service page. See everything NetSys delivers in Westchester County.
Also in Westchester County, NY: Network Security & Monitoring · Backup & Disaster Recovery
Cybersecurity elsewhere: New York City · Brooklyn, NY · Nassau County, NY · Suffolk County, NY · Stamford, CT
Related services: Managed IT Services · Penetration Testing · Cyber Insurance Readiness · vCISO Services
Cybersecurity in Westchester County, NY: FAQs
Who provides cybersecurity services in Westchester County?
The NetSys Group provides managed cybersecurity across Westchester County from its Brooklyn headquarters, with the county sitting inside the corridor our engineers drive between Brooklyn and the Hudson Valley. The service includes 24/7 monitoring, managed detection and response on every device, multifactor authentication and Conditional Access, phishing protection, security awareness training, privileged access management and immutable backups with tested restores. It begins with a free external penetration test, and every agreement runs month to month. NetSys has served business clients since 1998.
Do you come on-site for cybersecurity work in Westchester?
Yes. Westchester sits between our Brooklyn office and the lower Hudson Valley coverage area, so on-site engineer visits anywhere in the county are routine rather than a special trip. Engineers come for firewall and network work, incident response when a device needs to be pulled, security walkthroughs before an office move, and the discovery session that opens a managed relationship. We do not claim a Westchester office; our main line, 845-203-3914, is a Hudson Valley number and our one office is in Brooklyn.
What do registered investment advisers in Westchester need for SEC cybersecurity rules?
Regulation S-P now expects advisers to maintain a written program for safeguarding client information, including an incident response program and customer notification procedures, and SEC examiners ask to see it. In practice that means multifactor authentication and access controls, endpoint detection and monitoring with an incident response path, encrypted and immutable backups, vendor oversight, and policies that match what is in place. NetSys builds the controls and produces the documentation, and our vCISO service can own the program on your behalf.
Can you handle cybersecurity for a business with several locations in Westchester?
Yes. Multi-location operators are a normal part of our Westchester work, from a head office with a warehouse to a chain of retail or fitness sites. The locations are connected over encrypted site-to-site networking so they run as one managed environment, identity and endpoint controls apply uniformly, and an incident at one site can be contained without spreading. Staff who float between locations get one account with one set of permissions instead of a shared password at each door.
Do you offer vCISO services for Westchester firms?
Yes. A vCISO gives a firm a named owner for its security program without a full-time executive salary: risk assessments, policy authorship, board and partner reporting, insurer and regulator liaison, and oversight of the controls the engineers run. In Westchester it is most often used by investment advisers, insurance agencies and medical groups that have a compliance obligation and nobody senior to hold it. It runs on the same month-to-month terms as the rest of the agreement.
How much do cybersecurity services cost in Westchester County?
NetSys prices per business from what is there: user count, servers and cloud services, the number of locations, and how much on-site work the sites need. Cybersecurity is included in a managed agreement rather than added as an upgrade, and there is no long-term contract, so the monthly figure has to keep earning its place. The free external penetration test comes before any quote, and we publish how pricing is built rather than making you request it.
See what an attacker sees before they do.
The free external penetration test covers your website, public systems, public-record exposure and phishing likelihood, with a fix list you keep either way.