Company lists · Data refreshed September 2026

Top 25 Professional cybersecurity services based in Arlington, United States

Name: Professional cybersecurity services based in Arlington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 64 companies tracked

RevenueBase identified 64 company matches for professional cybersecurity services associated with Arlington, United States as of September 2026 and tracks 742 professional contacts across them, including 284 with verified work emails. Across the United States, New York is the largest hub for this category (208 companies); Arlington has 64.

This list covers company matches for professional cybersecurity services associated with Arlington, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

64Companies

742Contacts tracked

284Verified emails

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The 25 largest professional cybersecurity services based in Arlington, United States

Ranked by team size

Top 25 of 64 company matches for professional cybersecurity services based in Arlington, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Millennium Corporation	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	201-500	265 contacts →
	Exact match “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Sancorp Consulting, LLC	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	51-200	60 contacts →
	Exact match “Sancorp Consulting, LLC is focused on providing tailored, professional solutions in the areas of Insider Threat, Artificial Intelligence/Machine Learning, Identity Activities, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Tesla Laboratories, INC	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	59 contacts →
	Exact match “Tesla Laboratories provides Cyber Security, Intelligence Analysis, Financial Management and Program Management services to the Intelligence Community, the Department of Defense…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Cybastion	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	51-200	58 contacts →
	Exact match “CYBASTION develops robust world-class cybersecurity solutions tailored to suit the needs of different businesses, governments and public sector entities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	SUN Management	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	33 contacts →
	Exact match “Sun Management is a customer focused cybersecurity & advanced network solutions firm providing products and services that help solve your most difficult IT challenges.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Dios-Tech LLC	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	14 contacts →
	Exact match “We currently serve four Service areas: Cyber Security Services, Server Management Services, Software Development Services, and Support Services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	The Soter Group	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	13 contacts →
	Exact match “The Soter Group is a small business based in Arlington, Virginia.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Hancock & Poole Security INC	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	11 contacts →
	Exact match “Hancock & Poole Security (HPS) Inc.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	The Enterprise Security Consultants	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	7 contacts →
	Exact match “The Enterprise Security Consultants, LLC (dba TES Consultants) is an 8(a) Woman-Owned Small Business (WOSB) delivering industry leading cybersecurity and information technology…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Alico Cyber Solutions	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	1-10	7 contacts →
	Exact match “Alico Cyber Solutions provides information security serving highly satisfied customers in both the federal and private sectors.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Tactibit Technologies	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	6 contacts →
	Exact match “Tactibit is a small business serving Federal customers, specializing in Cybersecurity, Cloud Services and IT Operations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Neuvik	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	1-10	6 contacts →
	Exact match “Neuvik is a cybersecurity services company organized into cross-discipline offerings focused on integrating assessments and risk management into comprehensive security solutions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Cover6 Solutions	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	6 contacts →
	Exact match “Cover6 Solutions is a veteran-owned cybersecurity firm delivering vCISO services, compliance advisory, penetration testing, and workforce development to organizations across the…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Cyberblack	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	1-10	6 contacts →
	Exact match “Cyberblack is an Arlington, Virginia based consulting firm that specializes in providing commercial, government and personal solutions in the cybersecurity field.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Amplify Managed Services	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	4 contacts →
	Exact match “Amplify is a managed service provider (MSP) focused on cybersecurity and IT support and management for small to medium businesses.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Cystemic Security	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	4 contacts →
	Exact match “Whether it's cybersecurity, cloud computing, data analytics, emerging technologies, or operational guidance, our experts possess the knowledge and skills necessary to deliver…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Prydetech	Exact match	Arlington, TX, United StatesHQ recorded Sep 21, 2026	1-10	4 contacts →
	Exact match “Can your cybersecurity really be the make or break of your company?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Cybervault Solutions	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	3 contacts →
	Exact match “At CyberVault Solutions, we do more than just deliver cybersecurity-we build lasting partnerships rooted in trust, collaboration, and measurable results.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Shieldsurge Consulting	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	1-10	3 contacts →
	Exact match “Shieldsurge Consulting is a boutique cybersecurity firm specializing in multiple areas of operational IT security, including security engineering, critical incident response…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Jagkumar	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	2 contacts →
	Exact match “Led by a 20-year veteran of the tech industry, JagKumar’s experienced team delivers IT support, security, staffing, and infrastructure with an emphasis on physical security: CCTV…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Inqwest INC	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “InQwest Inc was founded in 2015 in Arlington, Virginia, by passionate members working within the IT Security Community.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Q3 Tech Group, LLC	Exact match	Arlington, TX, United StatesHQ recorded Sep 21, 2026	11-50	2 contacts →
	Exact match “Q3 Tech Group helps businesses throughout Texas reduce technology risk, improve cybersecurity, and leverage technology as a strategic advantage.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Teamlogic IT Arlington, VA	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	11-50	2 contacts →
	Exact match “Washington DC Metropolitan area, Are you looking for a dependable, proactive and responsive Services and Solutions You can Count On?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Ifortriss	Exact match	Arlington, TX, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “The Fortified Advantage of iFORTRISS We believe in doing the right thing to keep our country secure from external threats and the first step in that is doing what’s right for our…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Manageit Security	Exact match	Arlington, VA, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “ManageIT Security is a woman-owned small business (WOSB) that provides Cybersecurity consulting services to federal and private sector clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “professional cybersecurity services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 64 professional cybersecurity services based in Arlington, United States

See the full list, filter by size, metro and specialty, and access 284 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Professional cybersecurity services based in Arlington, United States at a glance

As of Sep 21, 2026

38.3%Verified-email coverage

11.6Average contacts per company

1-10Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

10001+

Email recency for this list is measured across the whole United States list rather than for Arlington, so it is reported there. Company counts and contact totals on this page are exact for Arlington, over 64 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Arlington, United States whose business descriptions match “professional cybersecurity services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 284 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Professional cybersecurity services by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “professional cybersecurity services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many professional cybersecurity services are there based in Arlington, United States?

RevenueBase identified 64 company matches for professional cybersecurity services associated with Arlington, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Millennium Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most professional cybersecurity services?

New York leads the United States with 208 company records, followed by Atlanta (125) and Austin (122). Arlington has 64.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 284 professional contacts with verified work emails tracked across these 64 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.