Company lists · Data refreshed September 2026

Top 25 Federal consulting firms based in the United States

Name: Federal 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 2, 2026 5,262 companies tracked

RevenueBase identified 5,262 federal consulting firms headquartered in the United States as of September 2026 and tracks 103,256 professional contacts across them, including 32,035 with verified work emails and 45,898 with mobile numbers. Washington is the largest hub.

This list covers federal 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 2, 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

5,262Companies

103,256Contacts tracked

32,035Verified emails

45,898Mobile numbers

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The 25 largest federal consulting firms based in the United States

Ranked by team size

Top 25 of 5,262 federal consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to federal 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 States	5,001-10,000	9,756 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 2, 2026
2	Public Consulting Group	Partial evidence	Boston, MA, United States	1,001-5,000	2,673 contacts →
	Partial evidence “Public Consulting Group (PCG) is a leading public sector solutions implementation and operations improvement firm that partners with health, education, and human services agencies…” Source: RevenueBase Database · checked Sep 2, 2026
3	DCS Corp	Indirect evidence	Alexandria, VA, United States	1,001-5,000	1,884 contacts →
	Indirect evidence “DCS delivers advanced technology and management solutions to Government agencies in the national security sector.” Source: RevenueBase Database · checked Sep 2, 2026
4	Davey Resource Group, INC	Indirect evidence	Kent, OH, United States	1,001-5,000	1,407 contacts →
	Indirect evidence “We are officially known as Davey Resource Group Inc, but we are more likely to come up in conversation around a successful project we've completed for a client or a capability we…” Source: RevenueBase Database · checked Sep 2, 2026
5	Ardurra	Indirect evidence	Flagstaff, AZ, United States	1,001-5,000	1,248 contacts →
	Indirect evidence “Expertly balancing experience and innovation to deliver unique solutions to public and private clients.” Source: RevenueBase Database · checked Sep 2, 2026
6	Odyssey Systems	Indirect evidence	Wakefield, MA, United States	1,001-5,000	898 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 2, 2026
7	Iron BOW Technologies	Indirect evidence	Honolulu, HI, United States	501-1,000	882 contacts →
	Indirect evidence “We deliver mission success through next-generation solutions across government, healthcare, and commercial markets.” Source: RevenueBase Database · checked Sep 2, 2026
8	ERG	Partial evidence	Atlanta, GA, United States	501-1,000	674 contacts →
	Partial evidence “ERG is a multidisciplinary consulting firm offering a broad range of professional services.” Source: RevenueBase Database · checked Sep 2, 2026
9	Salient Crgt	Indirect evidence	Fairfax, VA, United States	1,001-5,000	646 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 2, 2026
10	Abacus Technology Corporation	Indirect evidence	Chevy Chase, MD, United States	501-1,000	626 contacts →
	Indirect evidence “Abacus Technology Corporation delivers leading edge, high quality assistance in response to complex technology challenges.” Source: RevenueBase Database · checked Sep 2, 2026
11	Planned Systems International	Indirect evidence	Valparaiso, FL, United States	1,001-5,000	608 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 2, 2026
12	Solomonedwards	Indirect evidence	Wayne, PA, United States	1,001-5,000	566 contacts →
	Indirect evidence “For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: RevenueBase Database · checked Sep 2, 2026
13	Vencore INC	Indirect evidence	Chantilly, VA, United States	1,001-5,000	486 contacts →
	Indirect evidence “As of June 1, 2018, we are Perspecta.” Source: RevenueBase Database · checked Sep 2, 2026
14	The Mannik & Smith Group, INC	Indirect evidence	Hermitage, PA, United States	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 2, 2026
15	ALL Native Group, The Federal Services Division Of Ho-Chunk INC	Partial evidence	Winnebago, NE, United States	501-1,000	434 contacts →
	Partial evidence “All Native Group services the federal government both domestically and internationally.” Source: RevenueBase Database · checked Sep 2, 2026
16	Amyx, INC	Indirect evidence	Reston, VA, United States	501-1,000	429 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 2, 2026
17	Edgewater Federal Solutions, INC	Strong evidence	Pocatello, ID, United States	501-1,000	407 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 2, 2026
18	FCI Federal	Partial evidence	Arlington, VA, United States	1,001-5,000	348 contacts →
	Partial evidence “FCi Federal is now part of PAE.” Source: RevenueBase Database · checked Sep 2, 2026
19	Solix, INC	Partial evidence	Parsippany, NJ, United States	501-1,000	347 contacts →
	Partial evidence “Solix, Inc.(Solix) is a leading national provider of consulting and business process solutions focused on complex program management, eligibility determination, customer care, and…” Source: RevenueBase Database · checked Sep 2, 2026
20	GAP Solutions, INC	Indirect evidence	Herndon, VA, United States	501-1,000	347 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 2, 2026
21	Business Integra INC	Indirect evidence	Bethesda, MD, United States	501-1,000	338 contacts →
	Indirect evidence “JOBSEEKERS: Our Recruiters only ever reach out from BusinessIntegra.com or PeopleIntegra.com email addresses.” Source: RevenueBase Database · checked Sep 2, 2026
22	Lorven Technologies INC	Indirect evidence	Plainsboro, NJ, United States	1,001-5,000	323 contacts →
	Indirect evidence “Lorven Technologies, Inc.” Source: RevenueBase Database · checked Sep 2, 2026
23	Mayvin, INC	Indirect evidence	Alexandria, VA, United States	501-1,000	310 contacts →
	Indirect evidence “Mayvin is dedicated to protecting the interests of the United States.” Source: RevenueBase Database · checked Sep 2, 2026
24	Whitney, Bradley & Brown WBB	Indirect evidence	Reston, VA, United States	501-1,000	272 contacts →
	Indirect evidence “WBB (now a part of Serco) is a leading government and public sector solutions provider, dedicated to the enduring success of our clients.” Source: RevenueBase Database · checked Sep 2, 2026
25	GRSI	Indirect evidence	Bethesda, MD, United States	501-1,000	233 contacts →
	Indirect evidence “GRSi is a professional services and technology innovations company, providing state-of-the art solutions across a broad range of requirements, in highly agile yet controlled…” Source: RevenueBase Database · checked Sep 2, 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 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 consulting firms.
Partial evidence: Its own public description names part of federal 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 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 5,262 federal consulting firms based in the United States

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Federal consulting firms based in the United States at a glance

As of Sep 2, 2026

31.0%Verified-email coverage

44.5%Mobile-number coverage

19.6Average contacts per company

1-10Median size (employees)

7.1%Largest-city concentration · Washington

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

3,138

11-50

1,301

51-200

608

201-500

146

501-1,000

1,001-5,000

5,001-10,000

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 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 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 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 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, 32,035 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 2, 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 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 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 consulting firms are there based in the United States?

RevenueBase identified 5,262 federal 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 consulting firms?

Washington leads with 373 headquartered companies, followed by Arlington (134) and Atlanta (118).

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 32,035 verified decision-maker contacts tracked across these 5,262 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 2, 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.