Company lists · Data refreshed September 2026

Top 25 Federal government consulting firms worldwide

Name: Federal government consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 10,519 companies tracked

RevenueBase identified 10,519 company matches for federal government consulting firms worldwide as of September 2026 and tracks 145,333 professional contacts across them, including 38,613 with verified work emails. The United States is the largest market and Washington the largest hub.

This list covers company matches for federal government consulting firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026. Country and city lists for federal government consulting firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

10,519Companies

145,333Contacts tracked

38,613Verified emails

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The 25 largest federal government consulting firms worldwide

Ranked by team size

Top 25 of 10,519 company matches for federal government consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Mantech	Exact match	Herndon, VA, United StatesHQ recorded Sep 21, 2026	5,001-10,000	9,697 contacts →
	Exact match “MANTECH is more than a technology company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Asrc Federal	Exact match	Reston, VA, United StatesHQ recorded Sep 21, 2026	5,001-10,000	4,542 contacts →
	Exact match “ASRC Federal’s employees provide solutions for more than 30 U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	American Systems	Exact match	Mclean, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,899 contacts →
	Exact match “Founded in 1975, AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	DCS Corp	Exact match	Alexandria, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,898 contacts →
	Exact match “DCS delivers advanced technology and management solutions to Government agencies in the national security sector.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Kearney & Company	Exact match	Alexandria, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	999 contacts →
	Exact match “Established in 1985, Kearney & Company is the largest Certified Public Accounting (CPA) firm in the country exclusively focused on the government.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	PPC	Exact match	Trevose, PA, United StatesHQ recorded Sep 21, 2026	201-500	979 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	The MIL Corporation	Exact match	Bowie, MD, United StatesHQ recorded Sep 21, 2026	501-1,000	941 contacts →
	Exact match “Established in 1980, MIL provides innovative cyber, engineering, financial, and information technology services to the federal government.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Odyssey Systems	Exact match	Wakefield, MA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	906 contacts →
	Exact match “Odyssey is a leading provider of outstanding management, analytical, and technical support services to both the government and private sectors.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Iron BOW Technologies	Exact match	Herndon, VA, United StatesHQ recorded Sep 21, 2026	501-1,000	841 contacts →
	Exact match “We deliver mission success through next-generation solutions across government, healthcare, and commercial markets.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Cognosante	Exact match	Falls Church, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	829 contacts →
	Exact match “At Cognosante, we help create a safe, healthy, more equitable nation for all.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Mvm, INC	Exact match	San Antonio, TX, United StatesHQ recorded Sep 21, 2026	501-1,000	826 contacts →
	Exact match “MVM has been providing exceptional service to federal clients since its founding in 1979.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Systems Engineering Services Corporation Sesc	Exact match	Reston, VA, United StatesHQ recorded Sep 21, 2026	201-500	747 contacts →
	Exact match “Systems Engineering Services Corporation (SESC), founded in 1989, is a leading provider of technology solutions to Fortune companies and government organizations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Hx5, LLC	Exact match	Fort Walton Beach, FL, United StatesHQ recorded Sep 21, 2026	1,001-5,000	673 contacts →
	Exact match “HX5, LLC has specialized in providing professional support services to meet the needs of Federal Government organizations since its incorporation in 2004.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	ERG	Exact match	Concord, MA, United StatesHQ recorded Sep 21, 2026	501-1,000	663 contacts →
	Exact match “ERG is a multidisciplinary consulting firm offering a broad range of professional services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	CAT Technologies LTD	Exact match	Hyd, IndiaHQ recorded Sep 21, 2026	201-500	660 contacts →
	Exact match “CAT Technology Inc, established in October is engaged in providing quality consulting services in Systems Analysis, System Design, Database Administration, Systems Engineering…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Salient Crgt	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	639 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Abacus Technology Corporation	Exact match	Chevy Chase, MD, United StatesHQ recorded Sep 21, 2026	501-1,000	627 contacts →
	Exact match “Abacus Technology Corporation delivers leading edge, high quality assistance in response to complex technology challenges.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Planned Systems International	Exact match	Columbia, MD, United StatesHQ recorded Sep 21, 2026	1,001-5,000	611 contacts →
	Exact match “Since 1988, PSI teams have provided our government customers with innovative, cost effective solutions that solve today’s complex challenges, improve operational efficiencies, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Trax International Corporation	Exact match	Las Vegas, NV, United StatesHQ recorded Sep 21, 2026	1,001-5,000	587 contacts →
	Exact match “TRAX International has more than 30 years of experience delivering a range of professional technical services to the U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	DLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	201-500	546 contacts →
	Exact match “DLC is an award-winning industry leader in Finance, Accounting, Program Management & Process Improvement Consulting.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	GVA	Exact match	Paris, FranceHQ recorded Sep 21, 2026	51-200	499 contacts →
	Exact match “Créé en 1975, GVA est composé de 80 personnes, pour près de 10 millions de chiffre d’affaires.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	ITI	Exact match	Québec, QC, CanadaHQ recorded Sep 21, 2026	201-500	490 contacts →
	Exact match “We promote human, organizational and operational intelligence, not just artificial intelligence.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Vencore INC	Exact match	Chantilly, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	485 contacts →
	Exact match “As of June 1, 2018, we are Perspecta.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	The Mannik & Smith Group, INC	Exact match	Maumee, OH, United StatesHQ recorded Sep 21, 2026	501-1,000	467 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	ALL Native Group, The Federal Services Division Of Ho-Chunk INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	501-1,000	437 contacts →
	Exact match “For more than 20 years, All Native Group has delivered specialized expertise to federal agencies across civilian, defense, intelligence, and international missions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “federal government consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 10,519 federal government consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 38,613 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Federal government consulting firms worldwide at a glance

As of Sep 21, 2026

26.6%Verified-email coverage

13.8Average contacts per company

1-10Median size (employees)

3.5%Largest-city concentration · Washington

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

6,915

11-50

2,346

51-200

878

201-500

231

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for federal government consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “federal government consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 38,613 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Federal government consulting firms by location

56 lists · largest first

Every Federal government consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “federal government consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many federal government consulting firms are there worldwide?

RevenueBase identified 10,519 company matches for federal government consulting firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Mantech tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most federal government consulting firms?

The United States leads with 4,387 companies, followed by the United Kingdom (561) and France (445). Every federal government consulting firms list by country and city is linked on this page.

Which city has the most federal government consulting firms?

Washington leads with 368 company records, followed by London (131) and Arlington (127).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 38,613 professional contacts with verified work emails tracked across these 10,519 companies; direct dials are available where recorded.

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 SmartSearch, 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.