Company lists · Data refreshed September 2026

Top 22 Cybersecurity support services based in Mclean, United States

Name: Cybersecurity support services based in Mclean, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 39 companies tracked

RevenueBase identified 39 cybersecurity support services headquartered in Mclean, United States as of September 2026 and tracks 1,486 professional contacts across them, including 709 with verified work emails. New York is the largest hub.

This list covers cybersecurity support services headquartered in Mclean, 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

39Companies

1,486Contacts tracked

709Verified emails

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The 22 largest cybersecurity support services based in Mclean, United States

Ranked by team size

Top 22 of 39 cybersecurity support services based in Mclean, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity support 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	Ultraviolet Cyber	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	501-1,000	523 contacts →
	Indirect evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: RevenueBase Database · checked Sep 21, 2026
2	Merlin Cyber	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	160 contacts →
	Partial evidence “Merlin is a powerful ecosystem of cybersecurity investment, innovation, technical expertise, and go-to-market acceleration with 25 years of experience working with the U.S.” Source: RevenueBase Database · checked Sep 21, 2026
3	Valiant Solutions	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	201-500	152 contacts →
	Partial evidence “Valiant Solutions, LLC stands out as a premier provider of Cybersecurity and IT services aiding the Federal Government in staying ahead of complex information security challenges.” Source: RevenueBase Database · checked Sep 21, 2026
4	Network Designs, INC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	152 contacts →
	Partial evidence “NDi is a Verified Service-Disabled Veteran Owned Small Business [SDVOSB] professional services firm, supporting Federal and Commercial customers since 1995.” Source: RevenueBase Database · checked Sep 21, 2026
5	Saliense	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	107 contacts →
	Indirect evidence “Saliense is a high-end Technology Solutions provider based out of Tysons Corner, VA.” Source: RevenueBase Database · checked Sep 21, 2026
6	CRI	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	103 contacts →
	Partial evidence “Communications Resource, Inc.(CRI) is a minority and Woman-Owned Small Business with over 30 years of focused security performance supporting over 40 government and commercial…” Source: RevenueBase Database · checked Sep 21, 2026
7	Moxfive	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	61 contacts →
	Partial evidence “MOXFIVE is cybersecurity company helping organizations respond to incidents and minimize the risk of future attacks.” Source: RevenueBase Database · checked Sep 21, 2026
8	Breakpoint Labs	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	53 contacts →
	Partial evidence “BreakPoint Labs, a Valiant Solutions Company, delivers offensive and defensive cybersecurity to the Department of War, federal agencies, and commercial organizations.” Source: RevenueBase Database · checked Sep 21, 2026
9	Squadra	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	31 contacts →
	Partial evidence “Squadra Solutions delivers expert cybersecurity architecture, engineering, and advisory services to federal agencies, enterprises, and higher education institutions.” Source: RevenueBase Database · checked Sep 21, 2026
10	Digital Global Connectors, LLC DGC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “Digital Global Connectors, LLC, is a Woman Owned Small Business that provides Cyber Security and Information Assurance services to the Federal and Private sectors, with core…” Source: RevenueBase Database · checked Sep 21, 2026
11	Tangent Technologies, LLC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	51-200	15 contacts →
	Partial evidence “Tangent Technologies specializes in providing expert technical program management, cyber security infrastructure analysis, cloud services, and user-support services.” Source: RevenueBase Database · checked Sep 21, 2026
12	Techicon, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “Experts in Cyber Security focusing on assessment, compliance, FedRAMP advisory, and IT and OT penetration testing.” Source: RevenueBase Database · checked Sep 21, 2026
13	The Shattuck Group	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	8 contacts →
	Indirect evidence “The Shattuck Group is a cyber security engineering firm that specializes in protecting workloads from insider threats.” Source: RevenueBase Database · checked Sep 21, 2026
14	Digital Warfare	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	5 contacts →
	Indirect evidence “Most organizations believe they're protected.” Source: RevenueBase Database · checked Sep 21, 2026
15	H3o Labs, LLC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	3 contacts →
	Indirect evidence “H3O Labs is headquartered in VA with offices in McLean and Fairfax.” Source: RevenueBase Database · checked Sep 21, 2026
16	Secureitsm	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “SecureITSM – Defense-Grade CMMC Compliance, Cybersecurity & Managed Service Provider (MSP) for Federal Contractors SecureITSM is a veteran-led cybersecurity partner helping DoD…” Source: RevenueBase Database · checked Sep 21, 2026
17	Sengex	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	3 contacts →
	Indirect evidence “Sengex is a leader in large scale cyber and physical threat detection and mitigation.” Source: RevenueBase Database · checked Sep 21, 2026
18	Clear Entropy	Strong evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	2 contacts →
	Strong evidence “We're an innovative technology firm in the cybersecurity and digital transformation space, with disciplines in IT Solutions, Mission Support and Consulting for both federal…” Source: RevenueBase Database · checked Sep 21, 2026
19	W Tchtower	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	11-50	2 contacts →
	Partial evidence “Founded in 2010 by former Director of US CERT Mischel Kwon, and headquartered in McLean, VA, W@tchTower® LLC is a premier cybersecurity firm leading the transformation of security…” Source: RevenueBase Database · checked Sep 21, 2026
20	Onlineowls	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	1-10	2 contacts →
	Indirect evidence “OnlineOwls provides expertly customized, fully managed IT solutions for small and medium businesses––so you can open your doors knowing we’ve got you secured.” Source: RevenueBase Database · checked Sep 21, 2026
21	Maximum Justice Cybersecurity	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Partial evidence “Maximum Justice Cybersecurity helps organizations make AI, cybersecurity, cloud, and enterprise-technology decisions they can defend.” Source: RevenueBase Database · checked Sep 21, 2026
22	Draco IT Services, LLC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Partial evidence “Draco IT Services offers exceptional cloud security technical support for federal, state, and local organizations, with a team of highly experienced IT professionals providing the…” 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: cybersecurity support 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 cybersecurity support services.
Partial evidence: Its own public description names part of cybersecurity support services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity support 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 22 of 39 cybersecurity support services based in Mclean, United States

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Cybersecurity support services based in Mclean, United States at a glance

As of Sep 21, 2026

47.7%Verified-email coverage

38.1Average contacts per company

11-50Median size (employees)

728.2%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for Mclean, so it is reported there. Company counts and contact totals on this page are exact for Mclean, over 39 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 cybersecurity support 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 Mclean, United States whose own description of what they do matches “cybersecurity support 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 cybersecurity support 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 cybersecurity support services, and records with no verified work email. Companies headquartered outside Mclean 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, 709 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.

Cybersecurity support 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 cybersecurity support 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 cybersecurity support services are there based in Mclean, United States?

RevenueBase identified 39 cybersecurity support services headquartered in Mclean, 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?

Ultraviolet Cyber, headquartered in Mclean, tops this list with the largest team on record.

Which city has the most cybersecurity support services?

New York leads with 284 headquartered companies, followed by Houston (171) and Atlanta (150).

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 709 verified decision-maker contacts tracked across these 39 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.

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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 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.