Company lists · Data refreshed September 2026

Top 25 Federal government contractors based in the United States

Name: Federal government contractors 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 2,383 companies tracked

RevenueBase identified 2,383 federal government contractors headquartered in the United States as of September 2026 and tracks 211,520 professional contacts across them, including 38,983 with verified work emails. Washington is the largest hub.

This list covers federal government contractors 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

2,383Companies

211,520Contacts tracked

38,983Verified emails

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The 25 largest federal government contractors based in the United States

Ranked by team size

Top 25 of 2,383 federal government contractors 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 federal government contractors: 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	Leidos	Partial evidence	Reston, VA, United StatesHQ checked Sep 16, 2026	10001+	27,416 contacts →
	Partial evidence “Leidos is an industry and technology leader serving government & commercial customers with smarter, more efficient digital and mission innovations.” Source: RevenueBase Database · checked Sep 16, 2026
2	General Dynamics Information Technology	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 16, 2026	10001+	23,974 contacts →
	Indirect evidence “GDIT is a global technology and professional services company that delivers solutions, technology and mission services to every major agency across the U.S.” Source: RevenueBase Database · checked Sep 16, 2026
3	Peraton	Indirect evidence	Reston, VA, United StatesHQ checked Sep 16, 2026	10001+	10,793 contacts →
	Indirect evidence “At Peraton, we're at the forefront of delivering the next big thing every day.” Source: RevenueBase Database · checked Sep 16, 2026
4	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
5	Mantech	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 16, 2026	5,001-10,000	9,697 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 16, 2026
6	Accenture Federal Services	Strong evidence	Arlington, VA, United StatesHQ checked Sep 16, 2026	10001+	9,125 contacts →
	Strong evidence “We power reinvention across the US federal government to help agencies deliver greater outcomes using proven commercial solutions, mission expertise, and new technologies – cloud…” Source: RevenueBase Database · checked Sep 16, 2026
7	Asrc Federal	Partial evidence	Reston, VA, United StatesHQ checked Sep 16, 2026	5,001-10,000	4,542 contacts →
	Partial evidence “ASRC Federal’s employees provide solutions for more than 30 U.S.” Source: RevenueBase Database · checked Sep 16, 2026
8	DAY & Zimmermann	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 16, 2026	10001+	3,483 contacts →
	Indirect evidence “When you’ve been around for more than a century, you know a thing or two!” Source: RevenueBase Database · checked Sep 16, 2026
9	PAE	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 16, 2026	10001+	3,478 contacts →
	Indirect evidence “Since 1955, PAE has been a critical partner of the U.S.” Source: RevenueBase Database · checked Sep 16, 2026
10	Vectrus	Indirect evidence	Colorado Springs, CO, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,474 contacts →
	Indirect evidence “About Vectrus For more than 70 years, Vectrus has provided critical mission support for our customers’ toughest operational challenges.” Source: RevenueBase Database · checked Sep 16, 2026
11	LMI	Indirect evidence	Tysons, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,580 contacts →
	Indirect evidence “LMI is a new breed of digital solutions provider, disrupting the traditional govcon model with commercial-grade technology that is ready day-one.” Source: RevenueBase Database · checked Sep 16, 2026
12	American Systems	Strong evidence	Mclean, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,899 contacts →
	Strong 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
13	DCS Corp	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,898 contacts →
	Partial evidence “DCS delivers advanced technology and management solutions to Government agencies in the national security sector.” Source: RevenueBase Database · checked Sep 16, 2026
14	SOSI	Partial evidence	Reston, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,859 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
15	Chenega Corporation	Partial evidence	Anchorage, AK, United StatesHQ checked Sep 16, 2026	5,001-10,000	1,853 contacts →
	Partial evidence “As the most successful Alaska Native village corporation, Chenega figures prominently in the diverse government services contracting marketplace supporting defense, intelligence…” Source: RevenueBase Database · checked Sep 16, 2026
16	Perspecta	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 16, 2026	10001+	1,753 contacts →
	Indirect evidence “At Perspecta we question, we seek and we solve.” Source: RevenueBase Database · checked Sep 16, 2026
17	AKIMA	Strong evidence	Herndon, VA, United StatesHQ checked Sep 16, 2026	5,001-10,000	1,698 contacts →
	Strong evidence “Akima is a global enterprise delivering comprehensive solutions to the federal government in the core areas of information technology; facilities & ground logistics; aerospace…” Source: RevenueBase Database · checked Sep 16, 2026
18	Uicgs Bowhead Family Of Companies	Partial evidence	Springfield, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,651 contacts →
	Partial evidence “UIC Government Services and its Bowhead Family of Companies are a division of Ukpeaġvik Iñupiat Corporation, an Alaskan Native Corporation.” Source: RevenueBase Database · checked Sep 16, 2026
19	PPC	Indirect evidence	Trevose, PA, United StatesHQ checked Sep 16, 2026	201-500	979 contacts →
	Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 16, 2026
20	Chugach Government Solutions, LLC	Partial evidence	Anchorage, AK, United StatesHQ checked Sep 16, 2026	1,001-5,000	954 contacts →
	Partial evidence “Chugach Government Solutions,(CGS) is a government contracting company formed by Chugach Alaska Corporation.” Source: RevenueBase Database · checked Sep 16, 2026
21	The MIL Corporation	Strong evidence	Bowie, MD, United StatesHQ checked Sep 16, 2026	501-1,000	941 contacts →
	Strong evidence “Established in 1980, MIL provides innovative cyber, engineering, financial, and information technology services to the federal government.” Source: RevenueBase Database · checked Sep 16, 2026
22	Odyssey Systems	Partial evidence	Wakefield, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	906 contacts →
	Partial 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
23	REI Systems	Partial evidence	Sterling, VA, United StatesHQ checked Sep 16, 2026	501-1,000	863 contacts →
	Partial evidence “REI Systems delivers reliable and innovative technology solutions that empower federal, state, local, and nonprofit organizations to achieve their missions.” Source: RevenueBase Database · checked Sep 16, 2026
24	Iron BOW Technologies	Partial evidence	Herndon, VA, United StatesHQ checked Sep 16, 2026	501-1,000	841 contacts →
	Partial evidence “We deliver mission success through next-generation solutions across government, healthcare, and commercial markets.” Source: RevenueBase Database · checked Sep 16, 2026
25	Cognosante	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	829 contacts →
	Indirect evidence “At Cognosante, we help create a safe, healthy, more equitable nation for all.” 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: federal government contractors. 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 federal government contractors.
Partial evidence: Its own public description names part of federal government contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal government contractors. 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 2,383 federal government contractors based in the United States

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Federal government contractors based in the United States at a glance

As of Sep 16, 2026

18.4%Verified-email coverage

88.8Average contacts per company

11-50Median size (employees)

5.5%Largest-city concentration · Washington

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

806

11-50

761

51-200

537

201-500

182

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 2,383 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 federal government contractors, 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 “federal government contractors”. 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 federal government contractors), 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 federal government contractors, 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, 38,983 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.

Federal government contractors 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 federal government contractors, 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 federal government contractors are there based in the United States?

RevenueBase identified 2,383 federal government contractors 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?

Leidos, headquartered in Reston, tops this list with the largest team on record.

Which city has the most federal government contractors?

Washington leads with 130 headquartered companies, followed by Reston (84) and Alexandria (64).

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 38,983 verified decision-maker contacts tracked across these 2,383 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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Federal government contractors 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.