Company lists · Data refreshed September 2026

Top 25 Cybersecurity contractors based in Chantilly, United States

Name: Cybersecurity contractors based in Chantilly, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 58 companies tracked

RevenueBase identified 58 cybersecurity contractors headquartered in Chantilly, United States as of September 2026 and tracks 5,425 professional contacts across them, including 592 with verified work emails. New York is the largest hub.

This list covers cybersecurity contractors headquartered in Chantilly, 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

58Companies

5,425Contacts tracked

592Verified emails

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The 25 largest cybersecurity contractors based in Chantilly, United States

Ranked by team size

Top 25 of 58 cybersecurity contractors based in Chantilly, 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 contractors: 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	Arcfield	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	798 contacts →
	Partial evidence “Arcfield was purpose-built to protect the nation and its allies through innovations in systems engineering and integration, space and mission launch assurance, cybersecurity and…” Source: RevenueBase Database · checked Sep 21, 2026
2	Vencore INC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	485 contacts →
	Indirect evidence “As of June 1, 2018, we are Perspecta.” Source: RevenueBase Database · checked Sep 21, 2026
3	System High Corporation	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	501-1,000	368 contacts →
	Indirect evidence “System High Corporation, a Veilant company, delivers the most advanced protection and secrecy solutions to secure and strengthen critical missions, programs, operations, and…” Source: RevenueBase Database · checked Sep 21, 2026
4	Loginsoft	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	220 contacts →
	Partial evidence “For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Source: RevenueBase Database · checked Sep 21, 2026
5	Legal Interpreting Services, INC DBA LIS Solutions	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	212 contacts →
	Indirect evidence “Effective strategies for successful solutions With the right mix of specialists, we provide cyber security, language, intelligence, and information technology solutions for both…” Source: RevenueBase Database · checked Sep 21, 2026
6	Anavation LLC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	181 contacts →
	Indirect evidence “AnaVation is a trusted partner that delivers high-value, cost-effective solutions to solve our customers’ most complex technical and analytical problems.” Source: RevenueBase Database · checked Sep 21, 2026
7	Ampcus Cyber	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	170 contacts →
	Indirect evidence “Trusted By 2,880+ World-Class Brands And Organizations Of All Sizes…!” Source: RevenueBase Database · checked Sep 21, 2026
8	Integrity Applications Incorporated	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	123 contacts →
	Indirect evidence “Centauri is a leading provider of high-end engineering, intelligence, cyber security, and advanced technology solutions that keep our nation safe and secure from today’s…” Source: RevenueBase Database · checked Sep 21, 2026
9	Kudu Dynamics LLC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	113 contacts →
	Indirect evidence “Those who play with the devil's toys will be brought by degrees to wield his sword.~ R.” Source: RevenueBase Database · checked Sep 21, 2026
10	Coalfire Federal	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	79 contacts →
	Partial evidence “Coalfire Federal continues to grow as an industry-leading, award-winning company providing cybersecurity services to the largest Fortune 500 corporations and government agencies.” Source: RevenueBase Database · checked Sep 21, 2026
11	Qmulos	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	65 contacts →
	Partial evidence “Qmulos is the leading cybersecurity and IT compliance company that delivers innovative apps to help enterprises improve their security and compliance posture.” Source: RevenueBase Database · checked Sep 21, 2026
12	Ns2 Mission	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	61 contacts →
	Indirect evidence “NS2 Mission’s expert engineers and intelligence analysts provide tailored solutions to our nation’s classified Department of Defense and Intelligence Community, employing emerging…” Source: RevenueBase Database · checked Sep 21, 2026
13	FCI Enterprises LLC	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	60 contacts →
	Partial evidence “FCI is an ISO 9001:2015 certified, small business providing quality systems engineering, cybersecurity and IT services, and innovative financial and management solutions.” Source: RevenueBase Database · checked Sep 21, 2026
14	Datawiz Corporation A Gtsc Company	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	59 contacts →
	Indirect evidence “Datawiz Corporation was established in in the Commonwealth of Virginia.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ogsystems	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	201-500	58 contacts →
	Indirect evidence “At OGSystems, we exist to challenge the status quo and create something better.” Source: RevenueBase Database · checked Sep 21, 2026
16	Caci IDT	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	52 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
17	Cape FOX Federal Integrators A Cape FOX Company	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	46 contacts →
	Indirect evidence “Cape Fox Federal Integrators, LLC (CFFI) was founded in February 2008 as an Alaska Native Corporation (ANC), and was certified as a Small Business Administration 8(a) in December…” Source: RevenueBase Database · checked Sep 21, 2026
18	Copper River Information Technology	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	51-200	38 contacts →
	Indirect evidence “Since our inception, we have transformed the way our clients do business by delivering industry-leading, vendor agnostic IT network solutions, including: • Cyber Defense Solutions…” Source: RevenueBase Database · checked Sep 21, 2026
19	Onyx Government Services	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	25 contacts →
	Indirect evidence “Onyx Government Services, a Service-Disabled Veteran-Owned Small Business (SDVOSB), is headquartered in Chantilly, Virginia, with an additional office in Huntsville, Alabama.” Source: RevenueBase Database · checked Sep 21, 2026
20	Government Technical Services Corporation	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1-10	23 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
21	Blue Ridge Networks, INC	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “Based in Northern Virginia, Blue Ridge Networks is a visionary cybersecurity pioneer providing proven network access, infrastructure, and endpoint security solutions.” Source: RevenueBase Database · checked Sep 21, 2026
22	Copper River Technologies	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	21 contacts →
	Indirect evidence “As a Federally Recognized Alaskan Tribal 8(a) Certified Entity, Copper River Technologies understands that our Federal clients’ mission success is dependent upon creating a…” Source: RevenueBase Database · checked Sep 21, 2026
23	Condortech Services, INC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “Condortech Services Inc (CTS) is an experienced firm, providing Integrated Security Solutions for more than 28 years.” Source: RevenueBase Database · checked Sep 21, 2026
24	Atomicorp	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Atomicorp eliminates the high cost, complexity and burden of cybersecurity and compliance by harnessing and extending the power of Open Source Security (OSSEC), ModSecurity WAF…” Source: RevenueBase Database · checked Sep 21, 2026
25	Siege Technologies, LLC	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Siege Technologies is a pioneer of multi-purpose cybersecurity products and services that enable customers to leverage both offensive and defensive technologies.” 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 contractors. 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 contractors.
Partial evidence: Its own public description names part of cybersecurity contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity contractors. 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 58 cybersecurity contractors based in Chantilly, United States

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Cybersecurity contractors based in Chantilly, United States at a glance

As of Sep 21, 2026

10.9%Verified-email coverage

93.5Average contacts per company

11-50Median size (employees)

505.2%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

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for Chantilly, so it is reported there. Company counts and contact totals on this page are exact for Chantilly, over 58 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 contractors, 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 Chantilly, United States whose own description of what they do matches “cybersecurity contractors”. 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 contractors), 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 contractors, and records with no verified work email. Companies headquartered outside Chantilly 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, 592 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 contractors 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 contractors, 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 contractors are there based in Chantilly, United States?

RevenueBase identified 58 cybersecurity contractors headquartered in Chantilly, 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?

Arcfield, headquartered in Chantilly, tops this list with the largest team on record.

Which city has the most cybersecurity contractors?

New York leads with 293 headquartered companies, followed by Washington (220) and Austin (170).

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 592 verified decision-maker contacts tracked across these 58 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.