Company lists · Data refreshed September 2026

Top 25 Federal government consulting firms based in the United States

Name: Federal government 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 21, 2026 4,387 companies tracked

RevenueBase identified 4,387 federal government consulting firms headquartered in the United States as of September 2026 and tracks 102,228 professional contacts across them, including 32,283 with verified work emails. Washington is the largest hub.

This list covers federal government consulting firms 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 21, 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 21, 2026 86% judged on-target in blind review

4,387Companies

102,228Contacts tracked

32,283Verified emails

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The 25 largest federal government consulting firms based in the United States

Ranked by team size

Top 25 of 4,387 federal government consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to federal government consulting firms: 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	Mantech	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 21, 2026	5,001-10,000	9,697 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 21, 2026
2	Asrc Federal	Partial evidence	Reston, VA, United StatesHQ checked Sep 21, 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 21, 2026
3	American Systems	Strong evidence	Mclean, VA, United StatesHQ checked Sep 21, 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 21, 2026
4	DCS Corp	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 21, 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 21, 2026
5	Kearney & Company	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	999 contacts →
	Partial evidence “Established in 1985, Kearney & Company is the largest Certified Public Accounting (CPA) firm in the country exclusively focused on the government.” Source: RevenueBase Database · checked Sep 21, 2026
6	PPC	Indirect evidence	Trevose, PA, United StatesHQ checked Sep 21, 2026	201-500	979 contacts →
	Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 21, 2026
7	The MIL Corporation	Strong evidence	Bowie, MD, United StatesHQ checked Sep 21, 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 21, 2026
8	Odyssey Systems	Partial evidence	Wakefield, MA, United StatesHQ checked Sep 21, 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 21, 2026
9	Iron BOW Technologies	Partial evidence	Herndon, VA, United StatesHQ checked Sep 21, 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 21, 2026
10	Cognosante	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 21, 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 21, 2026
11	Mvm, INC	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 21, 2026	501-1,000	826 contacts →
	Partial evidence “MVM has been providing exceptional service to federal clients since its founding in 1979.” Source: RevenueBase Database · checked Sep 21, 2026
12	Systems Engineering Services Corporation Sesc	Partial evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	201-500	747 contacts →
	Partial evidence “Systems Engineering Services Corporation (SESC), founded in 1989, is a leading provider of technology solutions to Fortune companies and government organizations.” Source: RevenueBase Database · checked Sep 21, 2026
13	Hx5, LLC	Strong evidence	Fort Walton Beach, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	673 contacts →
	Strong 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 21, 2026
14	ERG	Partial evidence	Concord, MA, United StatesHQ checked Sep 21, 2026	501-1,000	663 contacts →
	Partial evidence “ERG is a multidisciplinary consulting firm offering a broad range of professional services.” Source: RevenueBase Database · checked Sep 21, 2026
15	Salient Crgt	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	639 contacts →
	Indirect evidence “For over 20 years, Salient CRGT has upheld its mission to "empower our diverse, hard-working team to deliver high-value solutions that make positive impacts on missions and…” Source: RevenueBase Database · checked Sep 21, 2026
16	Abacus Technology Corporation	Indirect evidence	Chevy Chase, MD, United StatesHQ checked Sep 21, 2026	501-1,000	627 contacts →
	Indirect evidence “Abacus Technology Corporation delivers leading edge, high quality assistance in response to complex technology challenges.” Source: RevenueBase Database · checked Sep 21, 2026
17	Planned Systems International	Partial evidence	Columbia, MD, United StatesHQ checked Sep 21, 2026	1,001-5,000	611 contacts →
	Partial 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 21, 2026
18	Trax International Corporation	Indirect evidence	Las Vegas, NV, United StatesHQ checked Sep 21, 2026	1,001-5,000	587 contacts →
	Indirect evidence “TRAX International has more than 30 years of experience delivering a range of professional technical services to the U.S.” Source: RevenueBase Database · checked Sep 21, 2026
19	DLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 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 21, 2026
20	Vencore INC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	485 contacts →
	Indirect evidence “As of June 1, 2018, we are Perspecta.” Source: RevenueBase Database · checked Sep 21, 2026
21	The Mannik & Smith Group, INC	Indirect evidence	Maumee, OH, United StatesHQ checked Sep 21, 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 21, 2026
22	ALL Native Group, The Federal Services Division Of Ho-Chunk INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 21, 2026	501-1,000	437 contacts →
	Partial evidence “For more than 20 years, All Native Group has delivered specialized expertise to federal agencies across civilian, defense, intelligence, and international missions.” Source: RevenueBase Database · checked Sep 21, 2026
23	Amyx, INC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	501-1,000	411 contacts →
	Indirect evidence “At Amyx, Inc, a wholly owned subsidiary of Tetra Tech, our mission is to exceed our customer's expectations on every contract, to provide an environment that encourages…” Source: RevenueBase Database · checked Sep 21, 2026
24	Edgewater Federal Solutions, INC	Strong evidence	Frederick, MD, United StatesHQ checked Sep 21, 2026	501-1,000	410 contacts →
	Strong evidence “Edgewater Federal Solutions was founded in 2002 with the mission of being the best IT consulting company possible for our government clients, our contracting partners and our…” Source: RevenueBase Database · checked Sep 21, 2026
25	Client Solution Architects	Strong evidence	Virginia Beach, VA, United StatesHQ checked Sep 21, 2026	501-1,000	376 contacts →
	Strong evidence “Client Solution Architects (CSA) is a global provider of integrated technology and operational support services to defense and federal government organizations.” Source: RevenueBase Database · checked Sep 21, 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 consulting firms. 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 consulting firms.
Partial evidence: Its own public description names part of federal government consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal government consulting firms. 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 4,387 federal government consulting firms based in the United States

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Federal government consulting firms based in the United States at a glance

As of Sep 21, 2026

31.6%Verified-email coverage

23.3Average contacts per company

1-10Median size (employees)

8.4%Largest-city concentration · Washington

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,483

11-50

1,115

51-200

568

201-500

156

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 4,387 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 consulting firms, 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 consulting firms”. 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 consulting firms), 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 consulting firms, 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, 32,283 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 21, 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 consulting firms 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 consulting firms, 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 consulting firms are there based in the United States?

RevenueBase identified 4,387 federal government consulting firms 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?

Mantech, headquartered in Herndon, tops this list with the largest team on record.

Which city has the most federal government consulting firms?

Washington leads with 368 headquartered companies, followed by Arlington (127) and Reston (91).

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 32,283 verified decision-maker contacts tracked across these 4,387 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 21, 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 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.