Company lists · Data refreshed September 2026

Top 25 Enterprise cybersecurity services based in Arlington, United States

Name: Enterprise 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 77 companies tracked

RevenueBase identified 77 enterprise cybersecurity services headquartered in Arlington, United States as of September 2026 and tracks 1,070 professional contacts across them, including 388 with verified work emails. New York is the largest hub.

This list covers enterprise cybersecurity services headquartered in Arlington, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

77Companies

1,070Contacts tracked

388Verified emails

Explore this list → Free signup · no credit card · 500 free credits

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

Ranked by team size

Top 25 of 77 enterprise cybersecurity services based in Arlington, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise cybersecurity services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Millennium Corporation	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	201-500	265 contacts →
	Partial evidence “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Source: RevenueBase Database · checked Sep 21, 2026
2	DTS	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	110 contacts →
	Partial evidence “DTS (Do The Security™) is a Service-Disabled Veteran-Owned Small Business (SDVOSB) and CMMC Level 2 enterprise-wide certified, ISO 27001-certified Managed Security Services…” Source: RevenueBase Database · checked Sep 21, 2026
3	Zermount, INC	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	51-200	105 contacts →
	Partial evidence “Zermount, Inc, a Certified SDVOSB, was founded by Terry Butler a proven leader and Cybersecurity/Information Technology (IT) professional with over15 years’ experience supporting…” Source: RevenueBase Database · checked Sep 21, 2026
4	Sancorp Consulting, LLC	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	51-200	60 contacts →
	Indirect evidence “Sancorp Consulting, LLC is focused on providing tailored, professional solutions in the areas of Insider Threat, Artificial Intelligence/Machine Learning, Identity Activities, and…” Source: RevenueBase Database · checked Sep 21, 2026
5	Tesla Laboratories, INC	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	59 contacts →
	Indirect evidence “Tesla Laboratories provides Cyber Security, Intelligence Analysis, Financial Management and Program Management services to the Intelligence Community, the Department of Defense…” Source: RevenueBase Database · checked Sep 21, 2026
6	Cybastion	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	51-200	58 contacts →
	Partial evidence “CYBASTION develops robust world-class cybersecurity solutions tailored to suit the needs of different businesses, governments and public sector entities.” Source: RevenueBase Database · checked Sep 21, 2026
7	ACI Solutions	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	41 contacts →
	Indirect evidence “ACI Solutions is a Secure Cloud and Managed Services Provider with U.S headquarters in Arlington, Virginia.” Source: RevenueBase Database · checked Sep 21, 2026
8	SUN Management	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	33 contacts →
	Partial evidence “Sun Management is a customer focused cybersecurity & advanced network solutions firm providing products and services that help solve your most difficult IT challenges.” Source: RevenueBase Database · checked Sep 21, 2026
9	Strategic Technology Partners	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “STP is an IT services company that specializes in building mission critical infrastructure, applications and cybersecurity systems.” Source: RevenueBase Database · checked Sep 21, 2026
10	Dios-Tech LLC	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “We currently serve four Service areas: Cyber Security Services, Server Management Services, Software Development Services, and Support Services.” Source: RevenueBase Database · checked Sep 21, 2026
11	Cedelis	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Indirect evidence “CEDELIS is an 8(a) Service-Disabled Minority Veteran-Owned Small Business (SDVOSB) that offers innovative IT services to Federal and Civilian agencies, located in the Washington…” Source: RevenueBase Database · checked Sep 21, 2026
12	The Soter Group	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	13 contacts →
	Indirect evidence “The Soter Group is a small business based in Arlington, Virginia.” Source: RevenueBase Database · checked Sep 21, 2026
13	Hancock & Poole Security INC	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “Hancock & Poole Security (HPS) Inc.” Source: RevenueBase Database · checked Sep 21, 2026
14	Dowless & Associates, INC	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “Dowless & Associates was incorporated in Dowless & Associates' competencies include Information and Cyber Security, IT Integration, Organizational Change Management and Integrated…” Source: RevenueBase Database · checked Sep 21, 2026
15	The Enterprise Security Consultants	Strong evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Strong evidence “The Enterprise Security Consultants, LLC (dba TES Consultants) is an 8(a) Woman-Owned Small Business (WOSB) delivering industry leading cybersecurity and information technology…” Source: RevenueBase Database · checked Sep 21, 2026
16	Amches	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Indirect evidence “Amches provides Wireless and Cyber Security Solutions using proprietary advanced Agile Methodology to cohesively integrate Program Management, Systems Engineering, and both…” Source: RevenueBase Database · checked Sep 21, 2026
17	Alico Cyber Solutions	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	1-10	7 contacts →
	Indirect evidence “Alico Cyber Solutions provides information security serving highly satisfied customers in both the federal and private sectors.” Source: RevenueBase Database · checked Sep 21, 2026
18	Tactibit Technologies	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Tactibit is a small business serving Federal customers, specializing in Cybersecurity, Cloud Services and IT Operations.” Source: RevenueBase Database · checked Sep 21, 2026
19	Neuvik	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Neuvik is a cybersecurity services company organized into cross-discipline offerings focused on integrating assessments and risk management into comprehensive security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
20	Cover6 Solutions	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Cover6 Solutions is a veteran-owned cybersecurity firm delivering vCISO services, compliance advisory, penetration testing, and workforce development to organizations across the…” Source: RevenueBase Database · checked Sep 21, 2026
21	Cyberblack	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Cyberblack is an Arlington, Virginia based consulting firm that specializes in providing commercial, government and personal solutions in the cybersecurity field.” Source: RevenueBase Database · checked Sep 21, 2026
22	Curated Cyber	Partial evidence	Arlington, TX, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “Curated Cyber provides fractional vCISO services to help businesses navigate cybersecurity with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
23	Iviry IT	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	4 contacts →
	Indirect evidence “Our team partners with government contractors to provide quality IT services, cyber security, and cyber compliance (NIST 800-171 and CMMC).” Source: RevenueBase Database · checked Sep 21, 2026
24	Amplify Managed Services	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	4 contacts →
	Partial evidence “Amplify is a managed service provider (MSP) focused on cybersecurity and IT support and management for small to medium businesses.” Source: RevenueBase Database · checked Sep 21, 2026
25	Cystemic Security	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	11-50	4 contacts →
	Partial evidence “Whether it's cybersecurity, cloud computing, data analytics, emerging technologies, or operational guidance, our experts possess the knowledge and skills necessary to deliver…” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: enterprise cybersecurity services. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names enterprise cybersecurity services.
Partial evidence: Its own public description names part of enterprise cybersecurity services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise cybersecurity services. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 77 enterprise cybersecurity services based in Arlington, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 388 reachable decision-makers.

Free signup · no credit card

View the full list →

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

As of Sep 21, 2026

36.3%Verified-email coverage

13.9Average contacts per company

1-10Median size (employees)

293.5%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 77 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among enterprise cybersecurity services, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Arlington, United States whose own description of what they do matches “enterprise cybersecurity services”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names enterprise cybersecurity services), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among enterprise cybersecurity services, and records with no verified work email. Companies headquartered outside Arlington are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 388 across the full list. 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.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Enterprise cybersecurity services by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names enterprise cybersecurity services, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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

RevenueBase identified 77 enterprise cybersecurity services headquartered in Arlington, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Millennium Corporation, headquartered in Arlington, tops this list with the largest team on record.

Which city has the most enterprise cybersecurity services?

New York leads with 226 headquartered companies, followed by Washington (155) and Houston (146).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 388 verified decision-maker contacts tracked across these 77 companies.

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.

Ready to reach these companies? Verified emails and direct dials for all 77 enterprise cybersecurity services based in Arlington, United States. Start with a free account, no credit card.

Download this list →

Related lists

Enterprise cybersecurity services by geography

Browse the directory

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 Smart Search, 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.