Company lists · Data refreshed September 2026
Top 25 Information security service providers based in Arlington, United States
RevenueBase identified 70 information security service providers headquartered in Arlington, United States as of September 2026 and tracks 978 professional contacts across them, including 358 with verified work emails. New York is the largest hub.
This list covers information security service providers 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.
The 25 largest information security service providers based in Arlington, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 265 contacts → | ||||
Indirect evidence “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 69 contacts → | ||||
Strong evidence “Designing Information Security Solutions with YOU in Mind.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 59 contacts → | ||||
Partial 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 58 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 7 | 33 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 32 contacts → | ||||
Partial evidence “As a leading Identity Security and Enterprise Application Services consultancy, we enable organizations across the US to mitigate risks and maximize defenses around core identity…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 24 contacts → | ||||
Indirect evidence “For over 20 years, Zeichner Risk Analytics (ZRA) has had small business experience in cybersecurity, risk management, program management, strategic planning and law and policy.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 11 contacts → | ||||
Partial evidence “Hancock & Poole Security (HPS) Inc.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 11 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 8 contacts → | ||||
Partial evidence “ENZO IT Solutions,"ENZO", is a leading organization of security, audit, and advisory experts.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Strong evidence “Alico Cyber Solutions provides information security serving highly satisfied customers in both the federal and private sectors.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 6 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Partial evidence “Elite Strategy Global (ESG) is a premier security management firm with an engaging collective of agile risk management solutions customized for high-net worth individuals…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 20 | 4 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Indirect evidence “Can your cybersecurity really be the make or break of your company?” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Indirect evidence “At CyberVault Solutions, we do more than just deliver cybersecurity-we build lasting partnerships rooted in trust, collaboration, and measurable results.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 3 contacts → | ||||
Partial evidence “Shieldsurge Consulting is a boutique cybersecurity firm specializing in multiple areas of operational IT security, including security engineering, critical incident response…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Indirect evidence “CYPHERINTEL is a consulting services company in the Washington, D.C.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 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: information security service providers. 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 information security service providers.
- Partial evidence
- Its own public description names part of information security service providers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name information security service providers. 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 70 information security service providers based in Arlington, United States
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Information security service providers based in Arlington, United States at a glance
As of Sep 21, 2026Companies by employee count
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 70 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 information security service providers, 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 “information security service providers”. 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 information security service providers), 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 information security service providers, 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, 358 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.
Information security service providers by metro in the United States
- Information security service providers in New York256
- Information security service providers in Houston153
- Information security service providers in Atlanta146
- Information security service providers in Washington144
- Information security service providers in Dallas140
- Information security service providers in Austin138
- Information security service providers in Chicago127
- Information security service providers in Miami127
- Information security service providers in Tampa103
- Information security service providers in San Francisco93
- Information security service providers in San Diego83
- Information security service providers in Los Angeles82
- Information security service providers in Charlotte73
- Information security service providers in Denver71
- Information security service providers in Arlington70
- Information security service providers in Boston64
- Information security service providers in Columbia60
- Information security service providers in Las Vegas60
- Information security service providers in Orlando59
- Information security service providers in San Antonio58
- Information security service providers in Seattle56
- Information security service providers in Alexandria53
- Information security service providers in Reston52
- Information security service providers in Phoenix51
- Information security service providers in Mclean48
- Information security service providers in Raleigh45
- Information security service providers in Baltimore43
- Information security service providers in Irvine43
- Information security service providers in Huntsville41
- Information security service providers in Sheridan41
- Information security service providers in Wilmington41
- Information security service providers in Ashburn40
- Information security service providers in Fairfax40
- Information security service providers in Portland39
- Information security service providers in Minneapolis37
- Information security service providers in Pittsburgh37
- Information security service providers in Indianapolis35
- Information security service providers in Plano35
- Information security service providers in Scottsdale35
- Information security service providers in Richmond34
- Information security service providers in San Jose34
- Information security service providers in Columbus33
- Information security service providers in Fort Lauderdale33
- Information security service providers in Colorado Springs32
- Information security service providers in Dover30
- Information security service providers in Nashville30
- Information security service providers in Alpharetta29
- Information security service providers in Herndon29
- Information security service providers in Philadelphia29
- Information security service providers in Vienna27
- Information security service providers in Frisco26
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 information security service providers, 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 information security service providers are there based in Arlington, United States?
RevenueBase identified 70 information security service providers 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 information security service providers?
New York leads with 256 headquartered companies, followed by Houston (153) and Atlanta (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 358 verified decision-maker contacts tracked across these 70 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.
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