Company lists · Data refreshed October 2026

Top 25 Defense systems engineering consultants based in the United States

Name: Defense systems engineering consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 2,408 companies tracked

RevenueBase identified 2,408 company matches for defense systems engineering consultants associated with the United States as of October 2026 and tracks 226,463 professional contacts across them, including 26,560 with verified work emails. Huntsville is the largest hub.

This list covers company matches for defense systems engineering consultants 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 October 11, 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 Oct 11, 2026 How this list was built

2,408Companies

226,463Contacts tracked

26,560Verified emails

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The 25 largest defense systems engineering consultants based in the United States

Ranked by team size

Top 25 of 2,408 company matches for defense systems engineering consultants based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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 Oct 11, 2026	10001+	76,380 contacts →
	Exact match “We are a close-knit community of big thinkers collaborating to keep the world safe.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	BAE Systems, INC	Exact match	Falls Church, VA, United StatesHQ recorded Oct 11, 2026	10001+	13,705 contacts →
	Exact match “Improving the future and protecting lives is an ambitious mission, but it’s what we do.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3	Dyncorp International	Exact match	Mclean, VA, United StatesHQ recorded Oct 11, 2026	10001+	11,065 contacts →
	Exact match “DynCorp International is now part of Amentum.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4	Mantech	Exact match	Herndon, VA, United StatesHQ recorded Oct 11, 2026	5,001-10,000	9,912 contacts →
	Exact match “About Us: At MANTECH, we believe national security demands more than technology-it requires an unwavering dedication to the mission and the warfighters who defend it.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5	Belcan	Exact match	Cincinnati, OH, United StatesHQ recorded Oct 11, 2026	5,001-10,000	5,112 contacts →
	Exact match “Belcan, a Cognizant company is a global supplier of engineering, manufacturing & supply chain, workforce and government IT solutions to customers in the aerospace, defense…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6	AEGIS	Exact match	Seattle, WA, United StatesHQ recorded Oct 11, 2026	n/a	2,454 contacts →
	Exact match “Aegis provides custom engineering and technology development services to a broad array of clients, including Fortune 100 companies, the U.S.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Modern Technology Solutions, Inc. Mtsi	Exact match	Alexandria, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,015 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 · Oct 11, 2026 · View company records in RevenueBase
8	American Systems	Exact match	Mclean, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,982 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 · Oct 11, 2026 · View company records in RevenueBase
9	Csra INC	Exact match	Falls Church, VA, United StatesHQ recorded Oct 11, 2026	10001+	1,503 contacts →
	Exact match “General Dynamics Information Technology and CSRA have united to create the premier provider of high-tech IT solutions to the government IT market.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10	Dynetics, INC	Exact match	Huntsville, AL, United StatesHQ recorded Oct 11, 2026	10001+	1,449 contacts →
	Exact match “Leidos Dynetics provides responsive, cost-effective engineering, scientific, IT solutions to the national security, cybersecurity, space, and critical infrastructure sectors.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11	COLSA	Exact match	Huntsville, AL, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,326 contacts →
	Exact match “COLSA Corporation is an engineering and support services company founded in 1980.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	Engility Corporation	Exact match	Reston, VA, United StatesHQ recorded Oct 11, 2026	5,001-10,000	1,309 contacts →
	Exact match “Engility Corporation is now part of SAIC, a premier technology integrator based in Reston, Virginia.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	VT Group VTG	Exact match	Alexandria, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,211 contacts →
	Exact match “VTG delivers force modernization and digital transformation solutions that expand America’s competitive advantage in the modern battlespace.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14	Radiance Technologies	Exact match	Huntsville, AL, United StatesHQ recorded Oct 11, 2026	1,001-5,000	1,064 contacts →
	Exact match “Radiance Technologies, Inc.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	PPC	Exact match	Trevose, PA, United StatesHQ recorded Oct 11, 2026	201-500	1,007 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Arcfield	Exact match	Chantilly, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	888 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	Teledyne Brown Engineering	Exact match	Huntsville, United StatesHQ recorded Oct 11, 2026	1,001-5,000	863 contacts →
	Exact match “Teledyne Brown Engineering is a leader in providing innovative systems engineering, integration, operations and advanced manufacturing solutions for defense, space, marine and…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	TSC	Exact match	Arlington, VA, United StatesHQ recorded Oct 11, 2026	501-1,000	835 contacts →
	Exact match “TSC is an employee-owned, high technology company engaged in providing engineering services and specialized products to U.S.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19	KAY And Associates, INC	Exact match	Buffalo Grove, IL, United StatesHQ recorded Oct 11, 2026	501-1,000	782 contacts →
	Exact match “Kay and Associates, Inc.(KAI) has kept the world's most demanding fleets mission-ready since 1960.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20	Precise Systems, INC	Exact match	Lexington Park, MD, United StatesHQ recorded Oct 11, 2026	1,001-5,000	767 contacts →
	Exact match “Precise Systems delivers integrated, mission-ready solutions that advance warfighter readiness and strengthen our nation’s most critical defense programs.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	STG INC	Exact match	Reston, VA, United StatesHQ recorded Oct 11, 2026	1,001-5,000	708 contacts →
	Exact match “SOS International LLC (SOSi) is a family-owned, middle-market government services integrator that works principally in the defense and intelligence sectors.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Ghafari Associates	Exact match	Dearborn, MI, United StatesHQ recorded Oct 11, 2026	501-1,000	690 contacts →
	Exact match “An innovator since 1982, Ghafari embraces an integrated design approach to deliver solutions that synergize building operations, systems, and people.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Tyonek Native Corp	Exact match	Anchorage, AK, United StatesHQ recorded Oct 11, 2026	201-500	674 contacts →
	Exact match “Tyonek Native Corporation, an Alaska Native Corporation formed under the Alaska Native Claims Settlement Act (ANCSA) in 1971.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	Epsilon Systems Solutions, INC	Exact match	San Diego, CA, United StatesHQ recorded Oct 11, 2026	501-1,000	671 contacts →
	Exact match “Epsilon Systems is a 100% employee-owned professional and technical services company founded in 1998 and headquartered in San Diego.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	Applied Research Solutions	Exact match	Beavercreek, OH, United StatesHQ recorded Oct 11, 2026	501-1,000	641 contacts →
	Exact match “Started in 2012, ARS is a growing business serving the Department of Defense and Intelligence Community.” Recorded in the RevenueBase company graph · Oct 11, 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 systems engineering consultants”. 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 2,408 defense systems engineering consultants based in the United States

See the full list, filter by size, metro and specialty, and access 26,560 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Defense systems engineering consultants based in the United States at a glance

As of Oct 11, 2026

11.7%Verified-email coverage

94.0Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · Huntsville

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

988

11-50

707

51-200

451

201-500

164

501-1,000

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 2,408 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 systems engineering consultants” 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 26,560 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 October 11, 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 systems engineering consultants 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 systems engineering consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many defense systems engineering consultants are there based in the United States?

RevenueBase identified 2,408 company matches for defense systems engineering consultants associated with the United States as of October 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 systems engineering consultants?

Huntsville leads with 116 company records, followed by San Diego (59) and Washington (53).

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 26,560 professional contacts with verified work emails tracked across these 2,408 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 October 11, 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.