Company lists · Data refreshed September 2026

Top 25 Government contracting consulting firms based in Washington, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 284 companies tracked

RevenueBase identified 284 government contracting consulting firms headquartered in Washington, United States as of September 2026 and tracks 3,413 professional contacts across them, including 1,213 with verified work emails. Across the United States, Washington is the largest hub for this category.

This list covers government contracting consulting firms 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 28, 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 28, 2026 86% judged on-target in blind review

284Companies

3,413Contacts tracked

1,213Verified emails

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The 25 largest government contracting consulting firms based in Washington, United States

Ranked by team size

Top 25 of 284 government contracting consulting firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to government contracting 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	TCG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	263 contacts →
	Indirect evidence “Traditional we are not.” Source: RevenueBase Database · checked Sep 28, 2026
2	Mcallister & Quinn	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
3	Herren Associates	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
4	CGS Federal Contact Government Services	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	141 contacts →
	Partial evidence “Contact Government Services strives to simplify and enhance government bureaucracy through the optimization of human, technical, and financial resources.” Source: RevenueBase Database · checked Sep 28, 2026
5	BCS LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
6	The Cohen Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
7	Martek Global	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	105 contacts →
	Indirect evidence “From breaking ground to gaining ground, Martek works with organizations to help them move, grow, and excel by becoming your organization's right hand assistant.” Source: RevenueBase Database · checked Sep 28, 2026
8	Corner Alliance	Strong evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	95 contacts →
	Strong 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 28, 2026
9	RWD Consulting, LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	201-500	93 contacts →
	Partial evidence “RWD Consulting, LLC provides a range of management and operations support and consulting services, administrative and logistical services, and technical and creative services to…” Source: RevenueBase Database · checked Sep 28, 2026
10	Simple Technology Solutions	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	90 contacts →
	Partial evidence “Simple Technology Solutions (STS) has in-depth experience helping federal & state government agencies in their Agile/DevOps/Cloud adoption & transformation.” Source: RevenueBase Database · checked Sep 28, 2026
11	Veracity Engineering	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	80 contacts →
	Indirect evidence “Since 2001, Veracity Engineering has been successful in building, growing, and performing on a portfolio of technically challenging engineering and program management engagements…” Source: RevenueBase Database · checked Sep 28, 2026
12	JMA Solutions	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	77 contacts →
	Partial evidence “Headquartered in Washington, DC, JMA Solutions is an award-winning consulting firm with more than 20 years of experience delivering extraordinary customer service to our…” Source: RevenueBase Database · checked Sep 28, 2026
13	Longevity Consulting	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	71 contacts →
	Partial evidence “Longevity Consulting is a customer-focused strategic management and IT consulting firm that helps federal agencies achieve mission objectives, improve outcomes, and strengthen…” Source: RevenueBase Database · checked Sep 28, 2026
14	Patrona Corporation	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	69 contacts →
	Indirect evidence “Patrona Corporation is a DoD federal contractor providing program management, engineering, strategic and operational planning, quality assurance, financial management, and…” Source: RevenueBase Database · checked Sep 28, 2026
15	Parker Tide LLC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	58 contacts →
	Indirect evidence “For over 20 years, Parker Tide has provided human resources support, personnel security, strategic solutions, and staff augmentation, nationwide to Federal customers.” Source: RevenueBase Database · checked Sep 28, 2026
16	Banner Staffing	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	n/a	49 contacts →
	Indirect evidence “Banner Staffing LLC is a high-quality provider of Professional, Management and Administrative support services.” Source: RevenueBase Database · checked Sep 28, 2026
17	Prosource360 Consulting Services	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	47 contacts →
	Partial evidence “Founded in 2011, ProSource360 is a premier professional, healthcare and technology services consulting firm supporting federal and commercial markets.” Source: RevenueBase Database · checked Sep 28, 2026
18	Iberia Advisory	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	46 contacts →
	Indirect evidence “Iberia Advisory, LLC, is a Service-Disabled Veteran-Owned Small Business that is committed to helping federal agencies address financial management challenges.” Source: RevenueBase Database · checked Sep 28, 2026
19	Creative Business Solutions, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	46 contacts →
	Indirect evidence “Creative Business Solutions Inc.(CBS) is an “award winning” Certified Participant in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
20	BTG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	44 contacts →
	Indirect evidence “At BTG, we provide turnkey solutions that minimize risk and optimize the inclusion of small businesses on large, complex projects.” Source: RevenueBase Database · checked Sep 28, 2026
21	Capital Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	43 contacts →
	Partial 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 28, 2026
22	Trust Consulting Services INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	201-500	42 contacts →
	Indirect 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 28, 2026
23	Polycon Solutions	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	51-200	38 contacts →
	Indirect evidence “PolyCon Solutions is a certified participant of the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
24	Iuvo Systems	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 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 28, 2026
25	Bright Star	Indirect evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Bright Star Solutions provides specialized Artificial Intelligence, Data Services, Strategic Communications, and Systems Engineering support to federal agencies.” Source: RevenueBase Database · checked Sep 28, 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 contracting 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 government contracting consulting firms.
Partial evidence: Its own public description names part of government contracting consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government contracting 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 284 government contracting consulting firms based in Washington, United States

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Government contracting consulting firms based in Washington, United States at a glance

As of Sep 28, 2026

35.5%Verified-email coverage

12.0Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

178

11-50

51-200

201-500

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 284 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 contracting 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 Washington, United States whose own description of what they do matches “government contracting 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 government contracting 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 government contracting consulting firms, 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, 1,213 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 28, 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 contracting consulting firms 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 contracting 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 government contracting consulting firms are there based in Washington, United States?

RevenueBase identified 284 government contracting consulting firms 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?

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

Which city in the United States has the most government contracting consulting firms?

Washington leads the United States with 284 headquartered companies, followed by Arlington (104) and Alexandria (82).

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 1,213 verified decision-maker contacts tracked across these 284 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 28, 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.