Company lists · Data refreshed September 2026

Top 25 Government consultants based in Washington, United States

Name: Government consultants based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 437 companies tracked

RevenueBase identified 437 government consultants headquartered in Washington, United States as of September 2026 and tracks 4,464 professional contacts across them, including 1,675 with verified work emails. Washington is the largest hub.

This list covers government consultants headquartered in Washington, 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

437Companies

4,464Contacts tracked

1,675Verified emails

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The 25 largest government consultants based in Washington, United States

Ranked by team size

Top 25 of 437 government consultants based in Washington, 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 consultants: 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	IBM Promontory	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	501-1,000	403 contacts →
	Indirect evidence “IBM Promontory is a global leader in strategy, risk management, and compliance consulting.#IBMConsulting” Source: RevenueBase Database · checked Sep 21, 2026
2	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
3	Mcallister & Quinn	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	170 contacts →
	Partial 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
4	Invariant	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	166 contacts →
	Indirect evidence “Invariant is a bipartisan business advisory firm, providing strategic advice to companies, trade associations, non-profits, and individuals on how to make Washington work for them.” Source: RevenueBase Database · checked Sep 21, 2026
5	Herren Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	142 contacts →
	Indirect evidence “Here at Herren, our goals are to drive efficiency and maximize the value of every dollar our clients spend.” Source: RevenueBase Database · checked Sep 21, 2026
6	Public & Government Affairs At Edelman	Strong evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	201-500	121 contacts →
	Strong evidence “Edelman’s public and government affairs team of consultants are trusted and experienced public affairs advisors-including former government officials, political advisors, policy…” Source: RevenueBase Database · checked Sep 21, 2026
7	BCS LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	201-500	111 contacts →
	Partial evidence “BCS Allegient is a small business with a 30-year history of helping government, research, and private sector clients implement their programs and missions and achieve success.” Source: RevenueBase Database · checked Sep 21, 2026
8	The Cohen Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	110 contacts →
	Partial evidence “Who We Are A talented team of experts with years of experience in both government and industry, with a passion for finding solutions and a deep understanding of the institutions…” Source: RevenueBase Database · checked Sep 21, 2026
9	Corner Alliance	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	95 contacts →
	Partial evidence “Founded in 2007, Corner Alliance is a government consulting firm that serves federal clients primarily in the public safety, emergency management and business intelligence spaces.” Source: RevenueBase Database · checked Sep 21, 2026
10	TFG The Ferguson Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	84 contacts →
	Indirect evidence “Founded in 1982, The Ferguson Group has a proud record of success advocating on behalf of local communities.” Source: RevenueBase Database · checked Sep 21, 2026
11	Mclarty Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	80 contacts →
	Indirect evidence “McLarty Associates, An Ankura Company, is the global strategy firm led by former Clinton White House Chief of Staff Thomas F.” Source: RevenueBase Database · checked Sep 21, 2026
12	Capitol Counsel, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	63 contacts →
	Partial evidence “Capitol Counsel, LLC is a full service government relations firm providing political analysis, strategic advice and advocacy services.” Source: RevenueBase Database · checked Sep 21, 2026
13	SMI	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	59 contacts →
	Indirect evidence “For three decades, Strategic Marketing Innovations (SMI) has been the premier choice in Washington for companies, universities, nonprofits and public entities seeking to secure…” Source: RevenueBase Database · checked Sep 21, 2026
14	Strategix Management LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	201-500	59 contacts →
	Indirect evidence “Founded in 2016 by President and CEO, Jonathan Crawley, Strategix Management LLC employs cutting-edge technology to streamline and ignite program activities that increase the…” Source: RevenueBase Database · checked Sep 21, 2026
15	The Roosevelt Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	53 contacts →
	Partial evidence “TRG is a government relations consulting firm located on the doorstep of the United States Capitol.” Source: RevenueBase Database · checked Sep 21, 2026
16	Ward Circle Strategies	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	52 contacts →
	Indirect evidence “Ward Circle Strategies, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
17	Carmen Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	51 contacts →
	Partial evidence “Carmen Group is Washington’s leading government affairs consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
18	Signal Group DC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	47 contacts →
	Partial evidence “We deliver successful outcomes for our clients, specializing in strategic communications, public affairs & government relations.” Source: RevenueBase Database · checked Sep 21, 2026
19	Capital Group	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	43 contacts →
	Indirect evidence “Capital Group is a management consulting firm with more than a decade of experience in providing effective and innovative consulting services to public and private sector clients.” Source: RevenueBase Database · checked Sep 21, 2026
20	Trust Consulting Services INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	201-500	42 contacts →
	Partial evidence “We bring an experience unmatched anywhere else, with knowledgeable and thoughtful consultants plus flexible, tailored approaches, all centered on the right outcomes for your…” Source: RevenueBase Database · checked Sep 21, 2026
21	Iuvo Systems	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	36 contacts →
	Partial evidence “At Iuvo Systems Inc, we empower government contractors and federal agencies to succeed by delivering specialized accounting, compliance, and business solutions tailored to the…” Source: RevenueBase Database · checked Sep 21, 2026
22	Economists Incorporated	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	35 contacts →
	Indirect evidence “Secretariat Economists is a premier economic consulting firm in the fields of law and economics, public policy, and business strategy.” Source: RevenueBase Database · checked Sep 21, 2026
23	Nvg, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	29 contacts →
	Partial evidence “NVG is a dynamic government relations firm specializing in policy, advocacy, strategic advice & outreach.” Source: RevenueBase Database · checked Sep 21, 2026
24	American Defense International	Indirect evidence	Washington, United StatesHQ checked Sep 21, 2026	11-50	28 contacts →
	Indirect evidence “American Defense International, Inc.(ADI) serves a worldwide client base with a unique combination of technical expertise and the ability to work with Washington's most important…” Source: RevenueBase Database · checked Sep 21, 2026
25	Merchant Mcintyre & Associates, LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “The team at Merchant McIntyre & Associates has more than 100 years of combined experience in federal and private grant funding, drafting and tracking legislation, securing…” 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 consultants. 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 consultants.
Partial evidence: Its own public description names part of government consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government consultants. 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 437 government consultants based in Washington, United States

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Government consultants based in Washington, United States at a glance

As of Sep 21, 2026

37.5%Verified-email coverage

10.2Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Washington

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

293

11-50

106

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 437 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 consultants, 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 Washington, United States whose own description of what they do matches “government consultants”. 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 consultants), 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 consultants, and records with no verified work email. Companies headquartered outside Washington 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, 1,675 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 consultants by metro in the United States

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 consultants, 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 consultants are there based in Washington, United States?

RevenueBase identified 437 government consultants headquartered in Washington, 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?

IBM Promontory, headquartered in Washington, tops this list with the largest team on record.

Which city has the most government consultants?

Washington leads with 437 headquartered companies, followed by New York (136) and Arlington (102).

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 1,675 verified decision-maker contacts tracked across these 437 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.