Company lists · Data refreshed September 2026

Top 25 Intelligence and security services based in Herndon, United States

Name: Intelligence and security services based in Herndon, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 54 companies tracked

RevenueBase identified 54 intelligence and security services headquartered in Herndon, United States as of September 2026 and tracks 14,854 professional contacts across them, including 3,789 with verified work emails. Washington is the largest hub.

This list covers intelligence and security services headquartered in Herndon, 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

54Companies

14,854Contacts tracked

3,789Verified emails

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The 25 largest intelligence and security services based in Herndon, United States

Ranked by team size

Top 25 of 54 intelligence and security services based in Herndon, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names intelligence and security services: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	MantechIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	5,001-10,000	9,756
	“MANTECH is more than a technology company.” Source: company website · checked Sep 4, 2026
2	Paragon Systems INCPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	10001+	1,946
	“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: company website · checked Sep 4, 2026
3	Omniplex World Services CorporationStrong evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	682
	“OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…” Source: company website · checked Sep 4, 2026
4	Zolon Tech INCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	501-1,000	457
	“Zolon Tech, Inc.” Source: company website · checked Sep 4, 2026
5	Sotera Defense Solutions, INCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	214
	“Sotera Defense Solutions (Sotera) has joined KeyW Corporation.” Source: company website · checked Sep 4, 2026
6	Ntrepid LLCPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	139
	“The Ntrepid Platform powers the diverse and evolving cyber operations needs of the national security and defense communities and the private sector.” Source: company website · checked Sep 4, 2026
7	NetcentricsIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	122
	“For 30 years, NetCentrics has excelled as an innovative technology solutions provider for the U.S.” Source: company website · checked Sep 4, 2026
8	Foxhole TechnologyIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	117
	“Foxhole Technology is a thought-leading technology firm offering a robust suite of cybersecurity, software development, systems engineering, and test & evaluation solutions for…” Source: company website · checked Sep 4, 2026
9	Indigo IT LLCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	101
	“Founded in 2001, Indigo IT is an award winning information technology consulting and services company.” Source: company website · checked Sep 4, 2026
10	Alku Government SolutionsStrong evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	98
	“ALKU Government Solutions is a National Security Defense Contractor serving the defense, energy, homeland security and intelligence communities.” Source: company website · checked Sep 4, 2026
11	Truestone, LLCPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	94
	“Truestone provides full lifecycle, business driven technology and information security-oriented services and solutions across the public and private sectors.” Source: company website · checked Sep 4, 2026
12	Chameleon Consulting Group LLCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	59
	“Chameleon Consulting Group, LLC was founded by a small group of professionals with extensive experience in cyber operations, software engineering, data analysis, and physical…” Source: company website · checked Sep 4, 2026
13	AVINTIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	46
	“Your Vision Achieved.” Source: company website · checked Sep 4, 2026
14	Athena Technology GroupPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	46
	“Cyber Security (Vulnerability Assessments, 24/7 Operations, Hunt Teams, Risk Management, Cyber Response) Program Management (Acquisition, Financial, Technology Insertion) System…” Source: company website · checked Sep 4, 2026
15	Sphinx Solutions INCPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	11-50	37
	“Sphinx Solutions is an entrepreneurial cyber security company that helps private- and public-sector organizations take advantage of solutions that match today’s security…” Source: company website · checked Sep 4, 2026
16	Rssi Onezero SolutionsIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	33
	“In October 2021, OneZero Solutions, LCC (OneZero), a leading federal cybersecurity and IT solutions provider, announced its acquisition of Right-Sized Solutions Inc.(RSSi), a…” Source: company website · checked Sep 4, 2026
17	TPGSIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	27
	“At TPGS, we understand and value the unique needs of our government clients and industry partners as well as the pressing need to complete projects on time.” Source: company website · checked Sep 4, 2026
18	Roka Security, LLCPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	11-50	27
	“Roka Security, LLC is a computer security firm located in the Washington D.C.” Source: company website · checked Sep 4, 2026
19	IP Network SolutionsPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	26
	“At IPNS, we work exclusively in the Federal marketplace, providing agencies in the Civilian, Defense and Intelligence communities with advanced IT systems solutions and…” Source: company website · checked Sep 4, 2026
20	Imperative Systems LLCPartial evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	11-50	20
	“Imperative’s mission is to enable the National Security Community to achieve their critical missions effectively, efficiently and securely.” Source: company website · checked Sep 4, 2026
21	Delex Systems, INCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	19
	Source: company website · checked Sep 4, 2026
22	KLC Network Services, INCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	16
	“KLC Network Services, Incorporated is an SBA business based in Herndon, Virginia that provides technical solutions to our valued customers.” Source: company website · checked Sep 4, 2026
23	IosentrixIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	11-50	13
	“ioSENTRIX is a Cybersecurity Consulting firm.” Source: company website · checked Sep 4, 2026
24	Railhead, INCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	51-200	11
	Source: company website · checked Sep 4, 2026
25	Anthony Timbers LLCIndirect evidence	Herndon, VA, United StatesHQ checked Sep 4, 2026	1-10	11
	“After years of experience working with the Federal Government, it is apparent that cybersecurity is not operating at its highest potential.” Source: company website · checked Sep 4, 2026

Showing 25 of 54 intelligence and security services based in Herndon, United States

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Intelligence and security services based in Herndon, United States at a glance

As of Sep 4, 2026

51-200Median size (employees)

WashingtonLargest hub · 199 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Herndon, over 54 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 intelligence and security services, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Herndon, United States whose own description of what they do matches “intelligence and security services”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among intelligence and security services, and records with no verified work email. Companies headquartered outside Herndon 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 an evidence 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, 3,789 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 4, 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.

Intelligence and security services by metro in the United States

Frequently asked

How many intelligence and security services are there based in Herndon, United States?

RevenueBase identified 54 intelligence and security services headquartered in Herndon, 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?

Mantech, headquartered in Herndon, tops this list with the largest team on record.

Which city has the most intelligence and security services?

Washington leads with 199 headquartered companies, followed by New York (159) and Houston (95).

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 3,789 verified decision-maker contacts tracked across these 54 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 4, 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 SmartSearch, 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.