Company lists · Data refreshed September 2026

Top 25 Cybersecurity contractors based in Ashburn, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 64 companies tracked

RevenueBase identified 64 cybersecurity contractors headquartered in Ashburn, United States as of September 2026 and tracks 1,417 professional contacts across them, including 397 with verified work emails. New York is the largest hub.

This list covers cybersecurity contractors headquartered in Ashburn, 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

64Companies

1,417Contacts tracked

397Verified emails

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The 25 largest cybersecurity contractors based in Ashburn, United States

Ranked by team size

Top 25 of 64 cybersecurity contractors based in Ashburn, 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	Telos Corporation	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	501-1,000	629 contacts →
	Indirect evidence “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: RevenueBase Database · checked Sep 21, 2026
2	CIS Secure	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	201-500	119 contacts →
	Indirect evidence “CIS Secure is a U.S-based defense technology company delivering mission-ready secure communications solutions and services for defense, intelligence, and federal organizations.” Source: RevenueBase Database · checked Sep 21, 2026
3	Delviom, LLC	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	51-200	63 contacts →
	Partial evidence “Delviom is a distinguished provider of cutting-edge cybersecurity and business intelligence (BI) solutions, dedicated to helping organizations strengthen their security posture…” Source: RevenueBase Database · checked Sep 21, 2026
4	Inquisit	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	51-200	50 contacts →
	Partial evidence “At InquisIT, we believe the business of government is vital to our nation and demands the highest caliber of contractor services.” Source: RevenueBase Database · checked Sep 21, 2026
5	Agensys Corporation	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	51-200	44 contacts →
	Indirect evidence “Agensys Corporation provides agile processes, skilled people, and technology solutions to help transform our Defense, Intelligence and Civilian agency customers.” Source: RevenueBase Database · checked Sep 21, 2026
6	Securdi	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence “We are a Cyber Security strategy and implementation company.” Source: RevenueBase Database · checked Sep 21, 2026
7	American Operations Corporation	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	51-200	37 contacts →
	Indirect evidence “American Operations Corporation (American Ops) our focus is on National Defense and Security Excellence.” Source: RevenueBase Database · checked Sep 21, 2026
8	Lunarline, INC	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	51-200	34 contacts →
	Partial evidence “Lunarline is a leading cybersecurity and 3PAO service provider to the U.S.” Source: RevenueBase Database · checked Sep 21, 2026
9	Punch Cyber Analytics Group	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	29 contacts →
	Indirect evidence “PUNCH is a cyber-consulting firm that provides advanced analytics and strategic support to government and commercial clients.” Source: RevenueBase Database · checked Sep 21, 2026
10	Varmoda Tech	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “At Varmoda Tech, we are on a mission to revolutionize industries and drive meaningful change through cutting-edge technology solutions.” Source: RevenueBase Database · checked Sep 21, 2026
11	Obscurity Labs	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “Obscurity Labs is a veteran owned cybersecurity firm.” Source: RevenueBase Database · checked Sep 21, 2026
12	Purple JAY Sdvosb	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “Purple Jay is a boutique infosec company that is driven to provide actionable guidance and design tailored solutions for the objective of defensible security.” Source: RevenueBase Database · checked Sep 21, 2026
13	Protect3 Solutions	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Indirect evidence “Protect3 provides cyber security solutions for government agencies.” Source: RevenueBase Database · checked Sep 21, 2026
14	Secure Anchor Consulting	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Secure Anchor Consulting provides high-touch cybersecurity services that help organizations prevent security breaches, detect network intrusions, and respond to advanced threats.” Source: RevenueBase Database · checked Sep 21, 2026
15	Diamond Information Systems, LLC	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Indirect evidence “Diamond provides outstanding results for our clients, with a focus on integrated, flexible, and economical solutions that meet business objectives.” Source: RevenueBase Database · checked Sep 21, 2026
16	Trinity Enterprise Services, LLC	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	8 contacts →
	Indirect evidence “TRINITY ENTERPRISE SERVICES, LLC is a Veteran-owned small business that leverages our combined 50+ years in the Information Technology field to provide quality IT experts in the…” Source: RevenueBase Database · checked Sep 21, 2026
17	Cybertlabs	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Cybersecurity must evolve in lock steps with organization’s technology and business processes.” Source: RevenueBase Database · checked Sep 21, 2026
18	Monoc Securities LLC	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “Monoc Securities LLC is a trusted security consulting firm specializing in the U.S.” Source: RevenueBase Database · checked Sep 21, 2026
19	Cisonow	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	5 contacts →
	Indirect evidence “At CISOnow, we deliver expert CISO Advisory Services, proactive security assessments, and managed security solutions to help organizations stay ahead of evolving threats and…” Source: RevenueBase Database · checked Sep 21, 2026
20	Rsekure Technologies	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
21	Foursyte	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “Foursyte delivers high-performance solutions for national security and critical government missions.” Source: RevenueBase Database · checked Sep 21, 2026
22	Nohack	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Partial evidence “A dynamic cybersecurity consulting partner offering tailored cyber security, IT, management, and career services designed to meet the unique needs of small businesses and…” Source: RevenueBase Database · checked Sep 21, 2026
23	Managenet INC	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	5 contacts →
	Indirect evidence “Managenet Inc is an information technology and services company based out of P.O.” Source: RevenueBase Database · checked Sep 21, 2026
24	Cognito Cyber Group	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	11-50	4 contacts →
	Indirect evidence “Cognito Cyber Group (CCG) is a diverse I.T.” Source: RevenueBase Database · checked Sep 21, 2026
25	Toptimum	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “We provide operational solutions to both commercial business and national security clients through a dedicated workforce of experienced, mission-focused officers.” 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 64 cybersecurity contractors based in Ashburn, United States

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Cybersecurity contractors based in Ashburn, United States at a glance

As of Sep 21, 2026

28.0%Verified-email coverage

22.1Average contacts per company

11-50Median size (employees)

457.8%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

Email recency for this list is measured across the whole United States list rather than for Ashburn, so it is reported there. Company counts and contact totals on this page are exact for Ashburn, over 64 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 Ashburn, 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 Ashburn 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, 397 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 Ashburn, United States?

RevenueBase identified 64 cybersecurity contractors headquartered in Ashburn, 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?

Telos Corporation, headquartered in Ashburn, 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 397 verified decision-maker contacts tracked across these 64 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.