Company lists · Data refreshed September 2026
Top 24 Cyber security IT companies based in Mclean, United States
RevenueBase identified 40 cyber security IT companies headquartered in Mclean, United States as of September 2026 and tracks 1,515 professional contacts across them, including 670 with verified work emails. Across the United States, New York is the largest hub for this category (197 companies); Mclean has 40.
This list covers cyber security IT companies 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 27, 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.
The 24 largest cyber security IT companies based in Mclean, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 523 contacts → | ||||
Strong 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 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 152 contacts → | ||||
Strong 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 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 107 contacts → | ||||
Indirect evidence “Saliense is a high-end Technology Solutions provider based out of Tysons Corner, VA.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 61 contacts → | ||||
Indirect evidence “MOXFIVE is cybersecurity company helping organizations respond to incidents and minimize the risk of future attacks.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 53 contacts → | ||||
Indirect 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 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 31 contacts → | ||||
Indirect evidence “Squadra Solutions delivers expert cybersecurity architecture, engineering, and advisory services to federal agencies, enterprises, and higher education institutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 31 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 21 contacts → | ||||
Strong 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 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 12 contacts → | ||||
Indirect evidence “NinjaJobs is founded by cybersecurity veterans that have built out the world’s most respected teams.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 11 contacts → | ||||
Partial evidence “Axxum Technologies is a premier provider of Network Communications and Information Technology Security Solutions.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 10 contacts → | ||||
Strong evidence “Experts in Cyber Security focusing on assessment, compliance, FedRAMP advisory, and IT and OT penetration testing.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 8 contacts → | ||||
Strong evidence “The Shattuck Group is a cyber security engineering firm that specializes in protecting workloads from insider threats.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 5 contacts → | ||||
Indirect evidence “Most organizations believe they're protected.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3 contacts → | ||||
Indirect evidence “H3O Labs is headquartered in VA with offices in McLean and Fairfax.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 3 contacts → | ||||
Indirect 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 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 contacts → | ||||
Partial evidence “Sengex is a leader in large scale cyber and physical threat detection and mitigation.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Strong evidence “Tyger Solutions Corporation (TSC) is an Information Technology (IT) consulting firm specializing in Information Security, custom technology designs, systems integration, and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Partial 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 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Indirect evidence “Maximum Justice Cybersecurity helps organizations make AI, cybersecurity, cloud, and enterprise-technology decisions they can defend.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence “Metavance Solutions is a management consulting and information technology services company serving clients in the private and public sectors.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
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: cyber security IT companies. 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 cyber security IT companies.
- Partial evidence
- Its own public description names part of cyber security IT companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name cyber security IT companies. 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 24 of 40 cyber security IT companies based in Mclean, United States
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Cyber security IT companies based in Mclean, United States at a glance
As of Sep 27, 2026Companies by employee count
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 40 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 cyber security IT companies, 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 “cyber security IT companies”. 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 cyber security IT companies), 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 cyber security IT companies, 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, 670 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 27, 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.
Cyber security IT companies by metro in the United States
- Cyber security IT companies in New York197
- Cyber security IT companies in Houston124
- Cyber security IT companies in Austin113
- Cyber security IT companies in Washington110
- Cyber security IT companies in Atlanta108
- Cyber security IT companies in Miami106
- Cyber security IT companies in Dallas103
- Cyber security IT companies in Chicago101
- Cyber security IT companies in Tampa88
- Cyber security IT companies in San Francisco84
- Cyber security IT companies in San Diego59
- Cyber security IT companies in Arlington58
- Cyber security IT companies in Columbia55
- Cyber security IT companies in Orlando54
- Cyber security IT companies in Los Angeles52
- Cyber security IT companies in Boston51
- Cyber security IT companies in San Antonio51
- Cyber security IT companies in Charlotte50
- Cyber security IT companies in Las Vegas50
- Cyber security IT companies in Denver49
- Cyber security IT companies in Phoenix46
- Cyber security IT companies in Seattle42
- Cyber security IT companies in Reston41
- Cyber security IT companies in Wilmington39
- Cyber security IT companies in Fairfax38
- Cyber security IT companies in San Jose37
- Cyber security IT companies in Sheridan37
- Cyber security IT companies in Alexandria36
- Cyber security IT companies in Huntsville34
- Cyber security IT companies in Baltimore33
- Cyber security IT companies in Dover33
- Cyber security IT companies in Pittsburgh32
- Cyber security IT companies in Raleigh31
- Cyber security IT companies in Colorado Springs29
- Cyber security IT companies in Fort Lauderdale29
- Cyber security IT companies in Irvine29
- Cyber security IT companies in Scottsdale29
- Cyber security IT companies in Ashburn28
- Cyber security IT companies in Plano27
- Cyber security IT companies in Portland27
- Cyber security IT companies in Herndon25
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 cyber security IT companies, 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 cyber security IT companies are there based in Mclean, United States?
RevenueBase identified 40 cyber security IT companies 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 in the United States has the most cyber security IT companies?
New York leads the United States with 197 headquartered companies, followed by Houston (124) and Austin (113). Mclean has 40.
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 670 verified decision-maker contacts tracked across these 40 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 27, 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.
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