Company lists · Data refreshed September 2026
Top 25 Defense contractor cybersecurity services based in Arlington, United States
RevenueBase identified 76 defense contractor cybersecurity services headquartered in Arlington, United States as of September 2026 and tracks 50,649 professional contacts across them, including 1,535 with verified work emails. Across the United States, Washington is the largest hub for this category (115 companies); Arlington has 76.
This list covers defense contractor 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 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.
The 25 largest defense contractor cybersecurity services based in Arlington, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 42,937 contacts → | ||||
Partial evidence “Raytheon, an RTX business, creates next-generation defense solutions that are smarter, faster and better than previously thought possible.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 5,980 contacts → | ||||
Partial evidence “Leonardo DRS Inc.(Nasdaq: DRS) is at the forefront of developing transformative defense technologies using its proven agility and delivering innovative solutions for U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 313 contacts → | ||||
Partial evidence “Airbus US Space & Defense is a trusted U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 265 contacts → | ||||
Partial evidence “For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 114 contacts → | ||||
Partial evidence “PRO-telligent, LLC, founded in January of is a multi-disciplinary strategic consulting and technology company providing services to Civilian, Defense, and National Security…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 110 contacts → | ||||
Indirect 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 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 92 contacts → | ||||
Indirect evidence “Decision Technologies is driven by the foresight and knowledge needed to advance the technical capabilities of our clients and help the nation succeed in its most critical…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 47 contacts → | ||||
Indirect evidence “System Planning Corporation (SPC)’s success supporting U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 44 contacts → | ||||
Indirect evidence “Competitive Innovations, LLC (CI) is an experienced and accountable U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 44 contacts → | ||||
Indirect evidence “Burningcastle LLC serves our Government & Commercial customers around the country in support of their IT, Training, Acquisition Support, Systems Engineering, Logistics and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 23 contacts → | ||||
Indirect evidence “Stanley Associates, Inc, now a wholly-owned subsidiary of CGI Federal Inc, provides services to the U.S.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 14 contacts → | ||||
Indirect evidence “Blue Ivy Partners has lived America’s missions and experienced the critical advantage of world-class technology.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 13 contacts → | ||||
Indirect evidence “The Soter Group is a small business based in Arlington, Virginia.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 11 contacts → | ||||
Indirect evidence “2 Twelve Solutions provides end to end engineering lab to support; rapid prototyping, cyber security, cloud computing, and Information technology/infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 11 contacts → | ||||
Indirect evidence “Hancock & Poole Security (HPS) Inc.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 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 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 10 contacts → | ||||
Indirect evidence “Cynnovative’s mission: To enable our customers to achieve superiority in the cyber domain by rewriting the laws of cyber and advancing state-of-the-art machine learning and…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 7 contacts → | ||||
Partial 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 28, 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: 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 76 defense contractor cybersecurity services based in Arlington, United States
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Defense contractor cybersecurity services based in Arlington, United States at a glance
As of Sep 28, 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 76 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 Arlington, 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 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, 1,535 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
- Defense contractor cybersecurity services in Washington115
- Defense contractor cybersecurity services in New York81
- Defense contractor cybersecurity services in Reston70
- Defense contractor cybersecurity services in Atlanta69
- Defense contractor cybersecurity services in Austin64
- Defense contractor cybersecurity services in Houston64
- Defense contractor cybersecurity services in Columbia63
- Defense contractor cybersecurity services in Herndon59
- Defense contractor cybersecurity services in Alexandria57
- Defense contractor cybersecurity services in Tampa57
- Defense contractor cybersecurity services in Dallas56
- Defense contractor cybersecurity services in Huntsville55
- Defense contractor cybersecurity services in Mclean54
- Defense contractor cybersecurity services in San Diego52
- Defense contractor cybersecurity services in Miami48
- Defense contractor cybersecurity services in San Antonio48
- Defense contractor cybersecurity services in Chantilly47
- Defense contractor cybersecurity services in Ashburn46
- Defense contractor cybersecurity services in Chicago46
- Defense contractor cybersecurity services in Los Angeles39
- Defense contractor cybersecurity services in Vienna37
- Defense contractor cybersecurity services in San Francisco36
- Defense contractor cybersecurity services in Denver34
- Defense contractor cybersecurity services in Fairfax34
- Defense contractor cybersecurity services in Baltimore32
- Defense contractor cybersecurity services in Orlando31
- Defense contractor cybersecurity services in Boston28
- Defense contractor cybersecurity services in Las Vegas28
- Defense contractor cybersecurity services in Phoenix28
- Defense contractor cybersecurity services in Charlotte27
- Defense contractor cybersecurity services in Colorado Springs27
- Defense contractor cybersecurity services in Leesburg27
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 Arlington, United States?
RevenueBase identified 76 defense contractor 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?
Raytheon, headquartered in Arlington, 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).
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 1,535 verified decision-maker contacts tracked across these 76 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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Defense contractor cybersecurity services by geography
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- Defense contractor cybersecurity services based in Canberra, Australia
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- Defense contractor cybersecurity services based in Sao Paulo, Brazil
- Defense contractor cybersecurity services based in Calgary, Canada
- Defense contractor cybersecurity services based in Montreal, Canada
- Defense contractor cybersecurity services based in Ottawa, Canada
- Defense contractor cybersecurity services based in Toronto, Canada
- Defense contractor cybersecurity services based in Santiago, Chile
- Defense contractor cybersecurity services based in Paris, France
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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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