Company lists · Data refreshed September 2026

Top 25 Defense IT consulting firms based in the United States

Name: Defense IT consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 9,223 companies tracked

RevenueBase identified 9,223 company matches for defense IT consulting firms associated with the United States as of September 2026 and tracks 531,837 professional contacts across them, including 102,728 with verified work emails. Washington is the largest hub.

This list covers company matches for defense IT consulting firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

9,223Companies

531,837Contacts tracked

102,728Verified emails

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The 25 largest defense IT consulting firms based in the United States

Ranked by team size

Top 25 of 9,223 company matches for defense IT consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Northrop Grumman	Exact match	Falls Church, VA, United StatesHQ recorded Sep 28, 2026	10001+	74,984 contacts →
	Exact match “We are a close-knit community of big thinkers collaborating to keep the world safe.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Leidos	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	10001+	27,416 contacts →
	Exact match “Leidos is an industry and technology leader serving government & commercial customers with smarter, more efficient digital and mission innovations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	General Dynamics Information Technology	Exact match	Falls Church, VA, United StatesHQ recorded Sep 28, 2026	10001+	23,974 contacts →
	Exact match “GDIT is a global technology and professional services company that delivers solutions, technology and mission services to every major agency across the U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Parsons Corporation	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 2026	10001+	19,456 contacts →
	Exact match “Founded in 1944, Parsons Corporation, a digitally enabled solutions provider, is focused on creating the future of the defense, intelligence, and critical infrastructure markets.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Caci International INC	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	10001+	19,221 contacts →
	Exact match “At CACI International Inc (NYSE: CACI), our talented and dynamic employees are ever vigilant in delivering distinctive expertise and technology to meet our customers’ greatest…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	CDW	Exact match	Vernon Hills, IL, United StatesHQ recorded Sep 28, 2026	10001+	13,155 contacts →
	Exact match “At CDW, we know how to make technology work so people can do great things.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Guidehouse	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	10001+	12,815 contacts →
	Exact match “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Peraton	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	10001+	10,793 contacts →
	Exact match “At Peraton, we're at the forefront of delivering the next big thing every day.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Dyncorp International	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	10001+	9,964 contacts →
	Exact match “DynCorp International is now part of Amentum.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Mantech	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	9,697 contacts →
	Exact match “MANTECH is more than a technology company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Asrc Federal	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	4,542 contacts →
	Exact match “ASRC Federal’s employees provide solutions for more than 30 U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Aricent	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 28, 2026	10001+	4,302 contacts →
	Exact match “Aricent is now Altran, delivering industry innovations at future speed.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Quest Software	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	3,206 contacts →
	Exact match “At Quest Software, we help organizations build modern, trusted foundations for AI.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,222 contacts →
	Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 2026	10001+	1,949 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Modern Technology Solutions, Inc. Mtsi	Exact match	Alexandria, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,920 contacts →
	Exact match “Modern Technology Solutions, Inc.(MTSI) is a 100% employee-owned engineering services and technology solutions company delivering first-choice capabilities to solve problems of…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Scientific Research Corporation	Exact match	Atlanta, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,917 contacts →
	Exact match “Scientific Research Corporation is an advanced engineering company that was founded in 1988 to provide innovative solutions to the U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	American Systems	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,899 contacts →
	Exact match “Founded in 1975, AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	DCS Corp	Exact match	Alexandria, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,898 contacts →
	Exact match “DCS delivers advanced technology and management solutions to Government agencies in the national security sector.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	SOSI	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,859 contacts →
	Exact match “Founded in 1989 and headquartered in Reston, Virginia, SOSi is a private, founder-led defense and government solutions firm specializing in advanced technology systems and mission…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Perspecta	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 2026	10001+	1,753 contacts →
	Exact match “At Perspecta we question, we seek and we solve.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	DMI	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,683 contacts →
	Exact match “DMI is a leading provider of digital services and technology solutions with a focus on end-to-end managed services, including managed mobility, cloud, cybersecurity, network…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	ASM Research	Exact match	Fairfax, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,568 contacts →
	Exact match “ASM Research, an Accenture Federal Services Company, is an information solutions integrator and a leading provider of innovative technology solutions and advanced analytical…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Government Acquisitions	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 28, 2026	n/a	1,440 contacts →
	Exact match “Government Acquisitions, LLC (GAI) stands at the forefront of a transformative era, where artificial intelligence is reshaping our world and the stakes have never been higher.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	V Group INC	Exact match	Cranbury, NJ, United StatesHQ recorded Sep 28, 2026	n/a	1,347 contacts →
	Exact match “Since V Group Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “defense IT consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 9,223 defense IT consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 102,728 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Defense IT consulting firms based in the United States at a glance

As of Sep 28, 2026

19.3%Verified-email coverage

57.7Average contacts per company

11-50Median size (employees)

3.1%Largest-city concentration · Washington

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,083

11-50

2,996

51-200

1,486

201-500

402

501-1,000

120

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 9,223 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “defense IT consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 102,728 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Defense IT consulting firms by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “defense IT consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many defense IT consulting firms are there based in the United States?

RevenueBase identified 9,223 company matches for defense IT consulting firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Northrop Grumman tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most defense IT consulting firms?

Washington leads with 282 company records, followed by Reston (186) and New York (186).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 102,728 professional contacts with verified work emails tracked across these 9,223 companies; direct dials are available where recorded.

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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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.