Company lists · Data refreshed September 2026

Top 25 Government contracting consulting firms based in the United States

Name: Government contracting 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 28, 2026 3,809 companies tracked

RevenueBase identified 3,809 government contracting consulting firms headquartered in the United States as of September 2026 and tracks 48,322 professional contacts across them, including 14,794 with verified work emails. Washington is the largest hub.

This list covers government contracting 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 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

3,809Companies

48,322Contacts tracked

14,794Verified emails

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

Ranked by team size

Top 25 of 3,809 government contracting consulting firms based in the 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	Gov-Con Solutions	Partial evidence	Broomfield, CO, United StatesHQ checked Sep 28, 2026	n/a	1,000 contacts →
	Partial evidence “Gov-Con provides financial and accounting solutions for government contractors such as SBIR Award Winners, DoD contractors, Prime Contractors and Subcontractors.” Source: RevenueBase Database · checked Sep 28, 2026
2	The Vertex Companies LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	765 contacts →
	Partial evidence “The Vertex Companies, LLC is a global consulting firm that provides strategic advisory, project management, and dispute resolution services for organizations that face complex…” Source: RevenueBase Database · checked Sep 28, 2026
3	Ads, INC	Indirect evidence	Virginia Beach, VA, United StatesHQ checked Sep 28, 2026	201-500	641 contacts →
	Indirect evidence “ADS provides innovative and cost-effective solutions for our customers’ equipment, procurement, and logistics challenges.” Source: RevenueBase Database · checked Sep 28, 2026
4	Planned Systems International	Partial evidence	Columbia, MD, United StatesHQ checked Sep 28, 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 28, 2026
5	GSA National	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 28, 2026	201-500	558 contacts →
	Partial evidence “GSA National has been helping government contractors ensure compliance and streamline costs since 1991.” Source: RevenueBase Database · checked Sep 28, 2026
6	Solomonedwards	Indirect evidence	Wayne, PA, United StatesHQ checked Sep 28, 2026	1,001-5,000	557 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 28, 2026
7	DLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 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 28, 2026
8	Vencore INC	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	485 contacts →
	Indirect evidence “As of June 1, 2018, we are Perspecta.” Source: RevenueBase Database · checked Sep 28, 2026
9	ALL Native Group, The Federal Services Division Of Ho-Chunk INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 28, 2026	501-1,000	437 contacts →
	Indirect 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 28, 2026
10	Edgewater Federal Solutions, INC	Strong evidence	Frederick, MD, United StatesHQ checked Sep 28, 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 28, 2026
11	Weaver Consultants Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	382 contacts →
	Indirect evidence “From its inception in 1991, Weaver Consultants Group has been founded upon the tenets of attentive and responsive customer service, strong project management, and solid internal…” Source: RevenueBase Database · checked Sep 28, 2026
12	JPI	Partial evidence	Blacksburg, VA, United StatesHQ checked Sep 28, 2026	51-200	373 contacts →
	Partial evidence “JPI is an Information Technology and Program Management Consulting Firm.” Source: RevenueBase Database · checked Sep 28, 2026
13	Deep Water Point & Associates	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 28, 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 28, 2026
14	Peerless Technologies Corporation	Partial evidence	Fairborn, OH, United StatesHQ checked Sep 28, 2026	201-500	326 contacts →
	Partial evidence “Peerless Technologies Corporation is a nationally recognized, award-winning, and reputable business serving federal government clients at more than 25 locations nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
15	Business Integra INC	Indirect evidence	Bethesda, MD, United StatesHQ checked Sep 28, 2026	501-1,000	324 contacts →
	Indirect evidence “JOBSEEKERS: Our Recruiters only ever reach out from BusinessIntegra.com or PeopleIntegra.com email addresses.” Source: RevenueBase Database · checked Sep 28, 2026
16	Planate Management Group	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 28, 2026	201-500	318 contacts →
	Indirect evidence “Planate Management Group (PMG) is a global leader in delivering engineering, construction and program management solutions that support mission success in complex and high-risk…” Source: RevenueBase Database · checked Sep 28, 2026
17	ATS	Indirect evidence	Cambridge, United StatesHQ checked Sep 28, 2026	n/a	313 contacts →
	Indirect evidence “ATS – 40 Years: Advancing Projects, Boosting Profits, and Cutting Costs For over 40 years, ATS has partnered with organizations worldwide to deliver outstanding results.” Source: RevenueBase Database · checked Sep 28, 2026
18	Iquasar LLC	Indirect evidence	Sterling, VA, United StatesHQ checked Sep 28, 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 28, 2026
19	Quantech Services INC	Indirect evidence	Lexington, MA, United StatesHQ checked Sep 28, 2026	201-500	299 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
20	CSG Government Solutions	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	287 contacts →
	Partial evidence “CSG is a national leader in planning, managing and supporting complex projects that modernize the IT and business processes of large government programs.” Source: RevenueBase Database · checked Sep 28, 2026
21	PE Systems, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 28, 2026	201-500	273 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
22	Cbeyondata SMX	Partial evidence	Arlington, VA, United StatesHQ checked Sep 28, 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 28, 2026
23	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
24	Netimpact Strategies INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 28, 2026	201-500	254 contacts →
	Partial evidence “NetImpact has been a Trusted Advisor driving impact through digital transformation for the Federal Government for over a decade.” Source: RevenueBase Database · checked Sep 28, 2026
25	Kalman & Company, INC	Indirect evidence	Virginia Beach, VA, United StatesHQ checked Sep 28, 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 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 3,809 government contracting consulting firms based in the United States

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Government contracting consulting firms based in the United States at a glance

As of Sep 28, 2026

30.6%Verified-email coverage

12.7Average contacts per company

1-10Median size (employees)

7.5%Largest-city concentration · Washington

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

2,555

11-50

836

51-200

318

201-500

501-1,000

1,001-5,000

5,001-10,000

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 3,809 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 the 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 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, 14,794 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

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 the United States?

RevenueBase identified 3,809 government contracting 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?

Gov-Con Solutions, headquartered in Broomfield, tops this list with the largest team on record.

Which city has the most government contracting consulting firms?

Washington leads 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 14,794 verified decision-maker contacts tracked across these 3,809 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.