Company lists · Data refreshed September 2026

Top 25 Defense contractor cybersecurity services based in Mclean, United States

Name: Defense contractor cybersecurity 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 28, 2026 54 companies tracked

RevenueBase identified 54 defense contractor cybersecurity services headquartered in Mclean, United States as of September 2026 and tracks 15,875 professional contacts across them, including 1,825 with verified work emails. Across the United States, Washington is the largest hub for this category (115 companies); Mclean has 54.

This list covers defense contractor cybersecurity 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 28, 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 28, 2026 86% judged on-target in blind review

54Companies

15,875Contacts tracked

1,825Verified emails

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The 25 largest defense contractor cybersecurity services based in Mclean, United States

Ranked by team size

Top 25 of 54 defense contractor cybersecurity services based in Mclean, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to defense contractor 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	Dyncorp International	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	10001+	9,964 contacts →
	Indirect evidence “DynCorp International is now part of Amentum.” Source: RevenueBase Database · checked Sep 28, 2026
2	Qinetiq US	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,383 contacts →
	Partial evidence “For over 60 years, QinetiQ US has been providing world-class technology development, engineering research and development and revolutionary products to the defense, security, and…” Source: RevenueBase Database · checked Sep 28, 2026
3	Agile Defense	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,086 contacts →
	Partial evidence “Agile Defense: Always Evolving Agile Defense stands at the forefront of innovation, driving advanced capabilities and solutions tailored to the most critical national security and…” Source: RevenueBase Database · checked Sep 28, 2026
4	Ultraviolet Cyber	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 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 28, 2026
5	Obxtek	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	349 contacts →
	Indirect evidence “OBXtek is a relationship-driven information technology and diversified professional services company.” Source: RevenueBase Database · checked Sep 28, 2026
6	VMD Corp	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	501-1,000	254 contacts →
	Partial evidence “About VMD VMD, now a part of Xcelerate Solutions, is a leading defense and national security company, delivering integrated solutions in enterprise security, strategic consulting…” Source: RevenueBase Database · checked Sep 28, 2026
7	Zachary Piper Solutions	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	236 contacts →
	Partial evidence “Zachary Piper Solutions (ZPS) provides technical and professional services in support of the United States government across six key sectors: Intelligence, Defense, Energy…” Source: RevenueBase Database · checked Sep 28, 2026
8	Cybermedia Technologies, LLC Ctec	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	223 contacts →
	Indirect evidence “We modernize legacy infrastructure, secure mission-critical systems and design digital experiences that impact millions of federal workers & American citizens every day.” Source: RevenueBase Database · checked Sep 28, 2026
9	Be, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	176 contacts →
	Indirect evidence “BE is a trusted partner on missions of vital importance to our customers, the nation and the world.” Source: RevenueBase Database · checked Sep 28, 2026
10	Integral Federal, INC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	153 contacts →
	Partial evidence “Integral partners with federal defense, intelligence, and civilian leaders to tackle their most important challenges and deliver transformative solutions.” Source: RevenueBase Database · checked Sep 28, 2026
11	Valiant Solutions	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 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 28, 2026
12	Network Designs, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	152 contacts →
	Indirect 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 28, 2026
13	Saliense	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 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 28, 2026
14	CRI	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	103 contacts →
	Indirect 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 28, 2026
15	Advanced Technology Systems Company	Strong evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	90 contacts →
	Strong evidence “Advanced Technology Systems Co.(ATSC) is a privately held US Defense contractor headquartered just outside of Washington D.C.” Source: RevenueBase Database · checked Sep 28, 2026
16	West 4th Strategy, LLC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	58 contacts →
	Partial evidence “West 4th, now strengthened by the acquisition of Integrated Systems (ISI), delivers rapid response technology services and mission-focused solutions to civilian, defense, and…” Source: RevenueBase Database · checked Sep 28, 2026
17	OCT Consulting LLC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	57 contacts →
	Indirect evidence “OCT Consulting LLC is a Small Business providing professional services and information technology solutions to U.S.” Source: RevenueBase Database · checked Sep 28, 2026
18	Breakpoint Labs	Strong evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	53 contacts →
	Strong 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 28, 2026
19	Squadra	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 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 28, 2026
20	Runsafe Security INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “RunSafe Security protects embedded software across critical infrastructure, delivering automated vulnerability identification and software hardening from build-time to runtime to…” Source: RevenueBase Database · checked Sep 28, 2026
21	Digital Global Connectors, LLC DGC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 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 28, 2026
22	Tangent Technologies, LLC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	15 contacts →
	Indirect 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 28, 2026
23	Cacg, LLC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “CACG, LLC is a mission-focused technology partner delivering secure IT solutions for the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
24	Axxum Technologies LLC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “Axxum Technologies is a premier provider of Network Communications and Information Technology Security Solutions.” Source: RevenueBase Database · checked Sep 28, 2026
25	Techicon, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 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 28, 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: defense contractor 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 defense contractor cybersecurity services.
Partial evidence: Its own public description names part of defense contractor cybersecurity services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense contractor 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 54 defense contractor cybersecurity services based in Mclean, United States

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Defense contractor cybersecurity services based in Mclean, United States at a glance

As of Sep 28, 2026

11.5%Verified-email coverage

294.0Average contacts per company

51-200Median size (employees)

Sep 28, 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 54 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 defense contractor 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 Mclean, United States whose own description of what they do matches “defense contractor 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 defense contractor 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 defense contractor cybersecurity 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, 1,825 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 28, 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.

Defense contractor 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 defense contractor 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 defense contractor cybersecurity services are there based in Mclean, United States?

RevenueBase identified 54 defense contractor cybersecurity 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?

Dyncorp International, headquartered in Mclean, tops this list with the largest team on record.

Which city in the United States has the most defense contractor cybersecurity services?

Washington leads the United States with 115 headquartered companies, followed by New York (81) and Arlington (76). Mclean has 54.

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 1,825 verified decision-maker contacts tracked across these 54 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 28, 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.