Company lists · Data refreshed September 2026

Top 25 Military cybersecurity companies based in the United States

RevenueBase identified 1,628 military cybersecurity companies headquartered in the United States as of September 2026 and tracks 175,937 professional contacts across them, including 30,012 with verified work emails and 77,017 with mobile numbers. Washington is the largest hub.

This list covers military cybersecurity companies headquartered in the 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 5, 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 5, 2026 86% judged on-target in blind review
1,628Companies
175,937Contacts tracked
30,012Verified emails
77,017Mobile numbers
Unlock all 1,628 companies Free signup · no credit card · 500 free credits

The 25 largest military cybersecurity companies based in the United States

Ranked by team size
Top 25 of 1,628 military cybersecurity companies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names military cybersecurity companies: 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.
#CompanyHeadquartersEmployeesContacts
1
Northrop GrummanIndirect evidence
Falls Church, VA, United StatesHQ checked Sep 5, 202610001+74,984

“We are a close-knit community of big thinkers collaborating to keep the world safe.”

Source: company website · checked Sep 5, 2026
2
Palo Alto NetworksPartial evidence
Santa Clara, CA, United StatesHQ checked Sep 5, 202610001+18,431

“Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.”

Source: company website · checked Sep 5, 2026
3
FortinetIndirect evidence
Sunnyvale, CA, United StatesHQ checked Sep 5, 202610001+14,289

“Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.”

Source: company website · checked Sep 5, 2026
4Chicago, IL, United StatesHQ checked Sep 5, 2026501-1,000874

“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.”

Source: company website · checked Sep 5, 2026
5
Quantum SKYIndirect evidence
Reston, VA, United StatesHQ checked Sep 5, 20261,001-5,000872

“Quantum Sky is a mission technology company that builds secure AI, cyber, cloud, and quantum capabilities for defense, intelligence, and federal civilian agencies.”

Source: company website · checked Sep 5, 2026
6Lansing, MI, United StatesHQ checked Sep 5, 2026n/a785

“ASK is now Convergence Networks!”

Source: company website · checked Sep 5, 2026
7
STRIndirect evidence
Woburn, MA, United StatesHQ checked Sep 5, 2026501-1,000763

“STR is driven to deliver impact.”

Source: company website · checked Sep 5, 2026
8
Fireeye, INCIndirect evidence
Milpitas, CA, United StatesHQ checked Sep 5, 20261,001-5,000676

“We are now officially Trellix!”

Source: company website · checked Sep 5, 2026
9
Telos CorporationIndirect evidence
Ashburn, VA, United StatesHQ checked Sep 5, 2026501-1,000629

“Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…”

Source: company website · checked Sep 5, 2026
10
Ultraviolet CyberIndirect evidence
Mclean, VA, United StatesHQ checked Sep 5, 2026501-1,000523

“UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…”

Source: company website · checked Sep 5, 2026
11
United Security, Inc. USIIndirect evidence
Red Bank, NJ, United StatesHQ checked Sep 5, 20261,001-5,000416

“United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.”

Source: company website · checked Sep 5, 2026
12Dayton, OH, United StatesHQ checked Sep 5, 20261,001-5,000381

“For 39 years, MacAulay-Brown, Inc.(MacB), an Alion Company, has been solving many of the Nation’s most complex National Security challenges.”

Source: company website · checked Sep 5, 2026
13
System High CorporationIndirect evidence
Chantilly, VA, United StatesHQ checked Sep 5, 2026501-1,000368

“System High Corporation, a Veilant company, delivers the most advanced protection and secrecy solutions to secure and strengthen critical missions, programs, operations, and…”

Source: company website · checked Sep 5, 2026
14
US ClaroPartial evidence
Miramar, FL, United StatesHQ checked Sep 5, 2026201-500345

“Claro, a subsidiary of América Móvil, is a global integrator with over 20 years of experience and your partner for managing secure-by-design cybersecurity and information…”

Source: company website · checked Sep 5, 2026
15
Sentar INCIndirect evidence
Huntsville, AL, United StatesHQ checked Sep 5, 2026201-500338

“Sentar, an employee-owned company, is a leading cyber-intelligence solutions provider focused on the National Security sector.”

Source: company website · checked Sep 5, 2026
16
Fgs, LLCIndirect evidence
La Plata, MD, United StatesHQ checked Sep 5, 2026201-500312

“Where Mission Meets Technology.”

Source: company website · checked Sep 5, 2026
17
FeditcIndirect evidence
Rockville, MD, United StatesHQ checked Sep 5, 2026201-500296

“Founded in 2003, FEDITC, LLC is an ISO and CMMI level 3 certified cyber security, IT, and engineering services firm.”

Source: company website · checked Sep 5, 2026
18
Cipher A Prosegur CompanyPartial evidence
Miami, FL, United StatesHQ checked Sep 5, 2026201-500295

“We are Cipher, a company from the Prosegur group specializing in Cybersecurity.”

Source: company website · checked Sep 5, 2026
19Alexandria, VA, United StatesHQ checked Sep 5, 2026201-500293

“Research Innovations Inc.(RII) supports critical defense, intelligence, and cyber customers across the U.S.”

Source: company website · checked Sep 5, 2026
20
Atlas TechIndirect evidence
North Charleston, SC, United StatesHQ checked Sep 5, 2026201-500278

“Since 1997, Atlas Tech has delivered secure, mission-critical IT and engineering solutions to defense and federal agencies worldwide.”

Source: company website · checked Sep 5, 2026
21
Keyw CorporationIndirect evidence
Hanover, MD, United StatesHQ checked Sep 5, 20261,001-5,000268

“KeyW is now Jacobs.”

Source: company website · checked Sep 5, 2026
22
Millennium CorporationPartial evidence
Arlington, VA, United StatesHQ checked Sep 5, 2026201-500265

“For nearly two decades, Millennium Corporation has been operating on the leading edge of cybersecurity.”

Source: company website · checked Sep 5, 2026
23
Mks2 TechnologiesIndirect evidence
Austin, TX, United StatesHQ checked Sep 5, 2026201-500265

“Founded in 2008, MKS2 Technologies has helped Federal government customers design, implement and sustain mission-focused IT solutions focusing on cyber security support…”

Source: company website · checked Sep 5, 2026
24
VMD CorpIndirect evidence
Mclean, VA, United StatesHQ checked Sep 5, 2026501-1,000254

“About VMD VMD, now a part of Xcelerate Solutions, is a leading defense and national security company, delivering integrated solutions in enterprise security, strategic consulting…”

Source: company website · checked Sep 5, 2026
25
LumifiIndirect evidence
Scottsdale, AZ, United StatesHQ checked Sep 5, 202651-200249

“Lumifi Cyber helps organizations illuminate their cyber defense with continuous protection across the full security lifecycle.”

Source: company website · checked Sep 5, 2026

Showing 25 of 1,628 military cybersecurity companies based in the United States

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Military cybersecurity companies based in the United States at a glance

As of Sep 5, 2026
11-50Median size (employees)
WashingtonLargest hub · 39 HQs
77,017Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
794
11-50
532
51-200
204
201-500
57
501-1,000
19
1,001-5,000
14
5,001-10,000
3
10001+
5

Verified emails by last verification

0–30
26,863
31–60
1,750
61–90
25
90–180
17
180+
1,357

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 military cybersecurity companies, 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 the United States whose own description of what they do matches “military cybersecurity companies”. 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 military cybersecurity companies, and records with no verified work email. Companies headquartered outside United States 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, 30,012 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 5, 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.

Frequently asked

How many military cybersecurity companies are there based in the United States?

RevenueBase identified 1,628 military cybersecurity companies headquartered in the 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?

Northrop Grumman, headquartered in Falls Church, tops this list with the largest team on record.

Which city has the most military cybersecurity companies?

Washington leads with 39 headquartered companies, followed by New York (37) and Austin (34).

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 30,012 verified decision-maker contacts tracked across these 1,628 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 5, 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.