Company lists · Data refreshed September 2026

Top 25 Government consulting companies based in the United States

Name: Government 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 21, 2026 3,106 companies tracked

RevenueBase identified 3,106 government consulting companies headquartered in the United States as of September 2026 and tracks 46,862 professional contacts across them, including 16,003 with verified work emails. Washington is the largest hub.

This list covers government 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 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

3,106Companies

46,862Contacts tracked

16,003Verified emails

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The 25 largest government consulting companies based in the United States

Ranked by team size

Top 25 of 3,106 government consulting companies 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 government 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	Protiviti	Partial evidence	Menlo Park, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	8,779 contacts →
	Partial evidence “Protiviti is a global consulting firm that delivers deep expertise, objective insights, a tailored approach and unparalleled collaboration to help leaders confidently face the…” Source: RevenueBase Database · checked Sep 21, 2026
2	ABT Global	Partial evidence	Rockville, MD, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,323 contacts →
	Partial evidence “Abt is a mission-driven consulting and research firm.” Source: RevenueBase Database · checked Sep 21, 2026
3	Public Consulting Group	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,694 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 21, 2026
4	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
5	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
6	Acumen, LLC	Indirect evidence	Burlingame, CA, United StatesHQ checked Sep 21, 2026	501-1,000	570 contacts →
	Indirect evidence “Acumen, LLC works to improve the information provided to policymakers who design and revise welfare, health, education, labor, and business programs at the national, state, and…” Source: RevenueBase Database · checked Sep 21, 2026
7	JBS International, INC	Indirect evidence	North Bethesda, MD, United StatesHQ checked Sep 21, 2026	201-500	506 contacts →
	Indirect evidence “Established in 1985 by two women, JBS International, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
8	NEW York State Technology Enterprise Corporation Nystec	Partial evidence	Rome, NY, United StatesHQ checked Sep 21, 2026	201-500	480 contacts →
	Partial evidence “For more than 30 years, NYSTEC has provided independent advisory services to our government partners.” Source: RevenueBase Database · checked Sep 21, 2026
9	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
10	JPI	Partial evidence	Blacksburg, VA, United StatesHQ checked Sep 21, 2026	51-200	373 contacts →
	Partial evidence “JPI is an Information Technology and Program Management Consulting Firm.” Source: RevenueBase Database · checked Sep 21, 2026
11	Deep Water Point & Associates	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 21, 2026	201-500	350 contacts →
	Partial evidence “Deep Water Point & Associates is composed of industry veterans and government experts who dedicate their expertise to maximize our clients’ competitive edge.” Source: RevenueBase Database · checked Sep 21, 2026
12	Iquasar LLC	Indirect evidence	Sterling, VA, United StatesHQ checked Sep 21, 2026	201-500	312 contacts →
	Indirect evidence “Based in Sterling, Virginia, iQuasar LLC, with over 20 years of experience, we help small and medium businesses grow in the federal marketplace through Proposal Development…” Source: RevenueBase Database · checked Sep 21, 2026
13	Cbeyondata SMX	Partial evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	201-500	266 contacts →
	Partial evidence “cBEYONData improves the business of government by understanding the overlapping relationship between data and dollars.” Source: RevenueBase Database · checked Sep 21, 2026
14	TCG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	263 contacts →
	Indirect evidence “Traditional we are not.” Source: RevenueBase Database · checked Sep 21, 2026
15	SSA Consultants	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 21, 2026	n/a	258 contacts →
	Partial evidence “We are partners and advisors of leading organizations and governments, bound to and inspired by a mission of helping our clients improve their performance.” Source: RevenueBase Database · checked Sep 21, 2026
16	Manhattan Strategy Group	Strong evidence	Bethesda, MD, United StatesHQ checked Sep 21, 2026	51-200	257 contacts →
	Strong evidence “Manhattan Strategy is a boutique research and management consulting firm dedicated to helping our government and commercial clients achieve performance excellence.” Source: RevenueBase Database · checked Sep 21, 2026
17	The Lewin Group	Partial evidence	Falls Church, VA, United StatesHQ checked Sep 21, 2026	201-500	231 contacts →
	Partial evidence “The Lewin Group is the Consulting business unit within OptumServe, the federal health services business of Optum and UnitedHealth Group.” Source: RevenueBase Database · checked Sep 21, 2026
18	Interwest Consulting Group	Partial evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	201-500	221 contacts →
	Partial evidence “Interwest specializes in providing professional and consulting services to public agencies across California, Nevada, Colorado, and beyond.” Source: RevenueBase Database · checked Sep 21, 2026
19	Kalman & Company, INC	Indirect evidence	Virginia Beach, VA, United StatesHQ checked Sep 21, 2026	201-500	213 contacts →
	Indirect evidence “Kalman & Company, Inc.(Kalman), headquartered in Virginia Beach, VA, was founded by Barbara and Walter Kalman in 1986.” Source: RevenueBase Database · checked Sep 21, 2026
20	Acuity, INC	Indirect evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	201-500	197 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
21	ICF Macro	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 21, 2026	5,001-10,000	197 contacts →
	Indirect evidence “As of April of 2009, Macro International is now part of ICF.” Source: RevenueBase Database · checked Sep 21, 2026
22	ASI Government	Partial evidence	Herndon, VA, United StatesHQ checked Sep 21, 2026	51-200	192 contacts →
	Partial evidence “For nearly two decades, ASI Government has served as a trusted advisor to government leaders seeking to improve mission performance, enhance organizational effectiveness and drive…” Source: RevenueBase Database · checked Sep 21, 2026
23	Mcallister & Quinn	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	170 contacts →
	Strong evidence “McAllister & Quinn is a Washington, DC consulting firm that provides a comprehensive range of services to a diverse group of clients with issues before the federal government.” Source: RevenueBase Database · checked Sep 21, 2026
24	Sprezzatura	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 21, 2026	51-200	166 contacts →
	Indirect evidence “Sprez·za·tu·ra (sprāt-tsä-ˈtü-rä) n.” Source: RevenueBase Database · checked Sep 21, 2026
25	Ripple Effect	Partial evidence	Rockville, MD, United StatesHQ checked Sep 21, 2026	201-500	152 contacts →
	Partial evidence “Ripple Effect provides professional consulting and exceptional talent for federal, private, and non-profit clients to deliver some of the most crucial policies and programs that…” 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: government 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 government consulting companies.
Partial evidence: Its own public description names part of government consulting companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government 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 3,106 government consulting companies based in the United States

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Government consulting companies based in the United States at a glance

As of Sep 21, 2026

34.1%Verified-email coverage

15.1Average contacts per company

1-10Median size (employees)

7.6%Largest-city concentration · Washington

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,168

11-50

671

51-200

199

201-500

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 3,106 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 government 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 “government 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 government 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 government 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, 16,003 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.

Government 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 government 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 government consulting companies are there based in the United States?

RevenueBase identified 3,106 government 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?

Protiviti, headquartered in Menlo Park, tops this list with the largest team on record.

Which city has the most government consulting companies?

Washington leads with 237 headquartered companies, followed by Arlington (70) and New York (63).

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 16,003 verified decision-maker contacts tracked across these 3,106 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.