Arlington, Virginia · Arlington County, Pentagon and Crystal City
Managed Cybersecurity Services in Arlington, Virginia
Capital Cyber provides managed IT and managed security for businesses in Arlington, from our team in Leesburg: one team for the help desk, the devices, Microsoft 365 and the security tools, with onsite visits in Arlington County.
Remote support with onsite visits in this area.
How We Support Arlington Businesses
Arlington is inside the Northern Virginia and Washington, DC area our Leesburg team visits in person. Most support is remote, and someone comes onsite for an office setup, a move or a device that needs hands.
The service is the same everywhere: a fixed monthly cost for managed IT, endpoint protection, Microsoft 365 and email security, backups with tested restores, and monitoring with a person who answers. The pages below explain each part.
Arlington County, Pentagon and Crystal City
What Do Arlington Contractors and Offices Need From IT?
Arlington is a county, home to the Pentagon and to DARPA's headquarters, with its offices concentrated in Crystal City, Rosslyn and Ballston. Its defense economy is contracting offices and program managers, so the businesses around them skew to consultancies, small research performers, law firms, associations and nonprofits, mostly working from suites in multi tenant office buildings.
In a leased suite the building network is often not yours to control, and staff move between the office, home and client sites. Security has to travel with the person and the laptop: multi-factor authentication, endpoint detection and response, Microsoft 365 and email security, and monitoring that does not depend on the office firewall. For contractors whose information is technical data and reports under a DFARS clause, our Compliance Division, Capital Cyber Compliance, delivers the CMMC work. We claim no relationship with any agency named here.
Virginia Law
What Virginia Requires After a Breach, and Why It Matters in Arlington
Va. Code § 18.2-186.6. Notice to affected people: without unreasonable delay.
Virginia's breach notification law is Va. Code § 18.2-186.6. When a business finds that personal information of Virginia residents was accessed or acquired by an unauthorized person, it must give notice without unreasonable delay. The statute sets no fixed number of days.
The notice goes to the Office of the Attorney General and to each affected resident. When more than 1,000 people are notified at one time, the business must also notify the nationwide consumer reporting agencies.
Virginia also has the Consumer Data Protection Act, Va. Code § 59.1-575 and following. It applies to businesses that control or process the personal data of at least 100,000 Virginia consumers in a year, or at least 25,000 consumers while earning over 50 percent of gross revenue from selling personal data. Data used in the context of an employee or contractor role is exempt. Most small businesses fall under these thresholds, which is worth confirming rather than assuming.
This is a plain language summary for orientation, reviewed in October 2026. It is not legal advice. Ask counsel about your own facts.
Questions From Arlington Businesses
5 QUESTIONSDoes Capital Cyber have an office in Arlington?
No. Our team is based in Leesburg, Virginia. Arlington is within the Northern Virginia and Washington, DC area where we visit clients onsite.
What does Virginia law require after a data breach?
Virginia requires notice without unreasonable delay to the Office of the Attorney General and to affected residents under Va. Code § 18.2-186.6, with no fixed day count.
Do you handle CMMC and other compliance work?
Yes, through our Compliance Division, Capital Cyber Compliance, at capitalcybercompliance.com. This page covers managed IT and managed security.
Can you secure an Arlington office in a shared building we do not control?
Yes. We put the protection on the people and devices rather than the building: multi-factor authentication, endpoint detection and response, Microsoft 365 and email security, and 24/7 monitoring, so it holds in the suite, at home and at a client site.
Do you support Arlington defense contractors and research firms?
Yes. We run the managed IT and security, and our Compliance Division, Capital Cyber Compliance, delivers CMMC and NIST SP 800-171 work when a contract requires it.
What We Manage
MFA and Endpoint Protection (EDR)
Multi-factor authentication, endpoint detection and response, and application control on every device.
Microsoft 365 and Email Security
Microsoft 365 set up, secured and run, with email protection against phishing and spoofing.
Managed Security Monitoring (MDR and SOC)
Round the clock monitoring, detection and response from a security operations center.
Managed IT and Help Desk
Unlimited remote support, monitoring and maintenance at a fixed monthly cost.
Virtual CISO (vCISO)
Senior security leadership, a roadmap and governance, without a full-time hire.
For Government Contractors
IT support, managed security and CMMC experience for defense and federal suppliers.
For Accounting and CPA Firms
Managed IT and security for CPA firms, with the WISP and FTC Safeguards Rule in view.
For Dental Practices
Managed IT, managed security and HIPAA compliance management for dental practices and DSOs.
For Auto Repair Shops and Auto Groups
Managed IT, networks and security for repair shops and multi-location auto groups.
Nearby Places We Visit Onsite
More Places We Serve in Virginia
ALL VIRGINIATalk Through Your Arlington IT.
Pick a time. Tell us how many people, locations and systems you run.
Looking for CMMC? Our Compliance Division, Capital Cyber Compliance, delivers it.
Under 25 people? Apply for an in-kind cybersecurity grant from Cyber Grants Alliance, a nonprofit. No cost to you.