Company lists · Data refreshed September 2026

Top 25 Defense contractor consulting companies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 2,458 companies tracked

RevenueBase identified 2,458 defense contractor consulting companies headquartered in the United States as of September 2026 and tracks 156,047 professional contacts across them, including 17,517 with verified work emails. Washington is the largest hub.

This list covers defense contractor consulting 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 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 16, 2026 86% judged on-target in blind review

2,458Companies

156,047Contacts tracked

17,517Verified emails

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The 25 largest defense contractor consulting companies based in the United States

Ranked by team size

Top 25 of 2,458 defense contractor consulting companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to defense contractor consulting companies: 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	Northrop Grumman	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 16, 2026	10001+	74,984 contacts →
	Indirect evidence “We are a close-knit community of big thinkers collaborating to keep the world safe.” Source: RevenueBase Database · checked Sep 16, 2026
2	Dyncorp International	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 16, 2026	10001+	9,964 contacts →
	Indirect evidence “DynCorp International is now part of Amentum.” Source: RevenueBase Database · checked Sep 16, 2026
3	Systems Planning & Analysis	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,092 contacts →
	Indirect evidence “Systems Planning & Analysis (SPA) is a leading global provider of data-driven analytical insights for critical national security programs.” Source: RevenueBase Database · checked Sep 16, 2026
4	Modern Technology Solutions, Inc. Mtsi	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,920 contacts →
	Indirect evidence “Modern Technology Solutions, Inc.(MTSI) is a 100% employee-owned engineering services and technology solutions company delivering first-choice capabilities to solve problems of…” Source: RevenueBase Database · checked Sep 16, 2026
5	American Systems	Partial evidence	Mclean, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,899 contacts →
	Partial evidence “Founded in 1975, AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of…” Source: RevenueBase Database · checked Sep 16, 2026
6	Csra INC	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 16, 2026	10001+	1,495 contacts →
	Indirect evidence “General Dynamics Information Technology and CSRA have united to create the premier provider of high-tech IT solutions to the government IT market.” Source: RevenueBase Database · checked Sep 16, 2026
7	Intrepidgs	Indirect evidence	Cape Canaveral, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,408 contacts →
	Indirect evidence “At Intrepid Global Solutions, we lead the way in mission-critical support where others can’t.” Source: RevenueBase Database · checked Sep 16, 2026
8	VT Group VTG	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,168 contacts →
	Indirect evidence “VTG delivers force modernization and digital transformation solutions that expand America’s competitive advantage in the modern battlespace.” Source: RevenueBase Database · checked Sep 16, 2026
9	Agile Defense	Partial evidence	Mclean, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,086 contacts →
	Partial evidence “Agile Defense: Always Evolving Agile Defense stands at the forefront of innovation, driving advanced capabilities and solutions tailored to the most critical national security and…” Source: RevenueBase Database · checked Sep 16, 2026
10	Radiance Technologies	Indirect evidence	Huntsville, AL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,049 contacts →
	Indirect evidence “Radiance Technologies, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
11	Odyssey Systems	Indirect evidence	Wakefield, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	906 contacts →
	Indirect evidence “Odyssey is a leading provider of outstanding management, analytical, and technical support services to both the government and private sectors.” Source: RevenueBase Database · checked Sep 16, 2026
12	DSA	Partial evidence	Trevose, PA, United StatesHQ checked Sep 16, 2026	201-500	842 contacts →
	Partial evidence “Data Systems Analysts, Inc.(DSA) has been providing mission essential solutions for Defense, Federal Government, Academia, and Commercial customers since 1963.” Source: RevenueBase Database · checked Sep 16, 2026
13	Arcfield	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	798 contacts →
	Indirect 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 16, 2026
14	KAY And Associates, INC	Indirect evidence	Buffalo Grove, IL, United StatesHQ checked Sep 16, 2026	501-1,000	754 contacts →
	Indirect evidence “Kay and Associates, Inc.(KAI) was established in 1960 by our founder Donald Kay to provide high quality, cost effective solutions in response to the need for engineering and…” Source: RevenueBase Database · checked Sep 16, 2026
15	Epsilon Systems Solutions, INC	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 16, 2026	501-1,000	676 contacts →
	Indirect evidence “Epsilon Systems is a 100% employee-owned professional and technical services company founded in 1998 and headquartered in San Diego.” Source: RevenueBase Database · checked Sep 16, 2026
16	Hx5, LLC	Indirect evidence	Fort Walton Beach, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	673 contacts →
	Indirect evidence “HX5, LLC has specialized in providing professional support services to meet the needs of Federal Government organizations since its incorporation in 2004.” Source: RevenueBase Database · checked Sep 16, 2026
17	Planned Systems International	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 16, 2026	1,001-5,000	611 contacts →
	Indirect evidence “Since 1988, PSI teams have provided our government customers with innovative, cost effective solutions that solve today’s complex challenges, improve operational efficiencies, and…” Source: RevenueBase Database · checked Sep 16, 2026
18	GSA National	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 16, 2026	201-500	558 contacts →
	Partial evidence “GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Source: RevenueBase Database · checked Sep 16, 2026
19	DLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 16, 2026	201-500	546 contacts →
	Partial evidence “DLC is an award-winning industry leader in Finance, Accounting, Program Management & Process Improvement Consulting.” Source: RevenueBase Database · checked Sep 16, 2026
20	Life Cycle Engineering	Partial evidence	Charleston, SC, United StatesHQ checked Sep 16, 2026	501-1,000	539 contacts →
	Partial evidence “Life Cycle Engineering (LCE) provides consulting, engineering, information technology and education solutions that deliver lasting results for private industry, public entities…” Source: RevenueBase Database · checked Sep 16, 2026
21	ASEC	Indirect evidence	Lexington Park, MD, United StatesHQ checked Sep 16, 2026	501-1,000	503 contacts →
	Indirect evidence “ASEC is an award-winning, 100% employee-owned business specializing in engineering, IT, training, and logistics, ensuring mission success through specialized expertise and…” Source: RevenueBase Database · checked Sep 16, 2026
22	Vencore INC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	485 contacts →
	Indirect evidence “As of June 1, 2018, we are Perspecta.” Source: RevenueBase Database · checked Sep 16, 2026
23	The Mannik & Smith Group, INC	Indirect evidence	Maumee, OH, United StatesHQ checked Sep 16, 2026	501-1,000	467 contacts →
	Indirect evidence “Technical skill, relationships and leadership are the foundation of The Mannik & Smith Group, Inc.(MSG) and have been not just a tradition, but a way of doing business for 70…” Source: RevenueBase Database · checked Sep 16, 2026
24	Fidelity Technologies Corporation	Partial evidence	Reading, PA, United StatesHQ checked Sep 16, 2026	501-1,000	461 contacts →
	Partial evidence “Fidelity Technologies Corporation is a leading global supplier of quality services and products to Government and Department of Defense clientele in the areas of simulation and…” Source: RevenueBase Database · checked Sep 16, 2026
25	Valkyrie Enterprises	Indirect evidence	Virginia Beach, VA, United StatesHQ checked Sep 16, 2026	501-1,000	460 contacts →
	Indirect evidence “Valkyrie, an ISO 9001:2015 certified company, enhances our customers' operations by providing engineering and technological expertise in digital engineering, logistics, program…” Source: RevenueBase Database · checked Sep 16, 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: defense contractor consulting companies. 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 defense contractor consulting companies.
Partial evidence: Its own public description names part of defense contractor consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense contractor consulting companies. 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 2,458 defense contractor consulting companies based in the United States

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Defense contractor consulting companies based in the United States at a glance

As of Sep 16, 2026

11.2%Verified-email coverage

63.5Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · Washington

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,307

11-50

630

51-200

353

201-500

112

501-1,000

1,001-5,000

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 2,458 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 defense contractor consulting companies, 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 the United States whose own description of what they do matches “defense contractor consulting companies”. 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 defense contractor consulting companies), 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 defense contractor consulting 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 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, 17,517 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 16, 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.

Defense contractor consulting companies by metro

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 defense contractor consulting companies, 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 defense contractor consulting companies are there based in the United States?

RevenueBase identified 2,458 defense contractor consulting 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 defense contractor consulting companies?

Washington leads with 131 headquartered companies, followed by Arlington (82) and Alexandria (68).

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 17,517 verified decision-maker contacts tracked across these 2,458 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 16, 2026.

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Defense contractor consulting companies by geography

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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.