Company lists · Data refreshed September 2026

Top 25 Big consulting firms based in Fairfax, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 46 companies tracked

RevenueBase identified 46 company matches for big consulting firms associated with Fairfax, United States as of September 2026 and tracks 1,386 professional contacts across them, including 283 with verified work emails. Across the United States, New York is the largest hub for this category (334 companies); Fairfax has 46.

This list covers company matches for big consulting firms associated with Fairfax, United States, 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.

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

46Companies

1,386Contacts tracked

283Verified emails

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The 25 largest big consulting firms based in Fairfax, United States

Ranked by team size

Top 25 of 46 company matches for big consulting firms based in Fairfax, United States, 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	Integrityone Partners	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	n/a	205 contacts →
	Exact match “INTEGRITYOne Partners is a business and technology services company delivering mission-critical results to leaders working on our nation’s top priorities.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Nationwide IT Services, INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	201-500	190 contacts →
	Exact match “Nationwide IT Services, Inc.(NIS) is designated 8(a) by the SBA, and a CVE verified Service Disabled Veteran Owned Small Business (SDVOSB) Information Technology (IT) and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Kforce Government Solutions, Inc. KGS	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	501-1,000	140 contacts →
	Exact match “Kforce Government Solutions, Inc.(KGS) is a provider of financial management, transformation management, and technology solutions to the government.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Mcking Consulting	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	51-200	118 contacts →
	Exact match “McKing Consulting Corporation provides a variety of general and specialized management consulting services to the federal government, state agencies, nonprofits, and public and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Hadiamondstar Software Solutions LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	51-200	98 contacts →
	Exact match “Hadiamondstar Software Solutions LLC Known as is a leading Global Consulting and IT Services company, offering a wide array of solutions ranging from strategy consulting right…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Metronome	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	51-200	92 contacts →
	Exact match “Metronome partners with federal customers to lead them on the Digital Transformation journey.and we will get them there lightning-fast.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Inalab	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	51-200	91 contacts →
	Exact match “Inalab is a leading IT solutions and strategy consulting firm focused on providing solutions that transform enterprise operations in the government and commercial sectors by…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Inforeliance	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	201-500	70 contacts →
	Exact match “When organizations need to be on time-and on budget-they call InfoReliance.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	ERPI	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	201-500	57 contacts →
	Exact match “Enterprise Resource Performance Inc.(ERPi) is a professional services rm that delivers strategic, advisory, technological, and implementation support services to Federal Agencies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Symposit LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	13 contacts →
	Exact match “Symposit LLC is an advisory management firm that specializes in leveraging information technology (IT) to provide value to it's clients by optimizing operations, reducing risk…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Gunnison Consulting Group, INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	201-500	11 contacts →
	Exact match “In 1994 Gunnison Consulting Group began serving the greater Washington, D.C.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Advance Digital Systems	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	51-200	9 contacts →
	Exact match “Advance Digital Systems (ADS) is a leading provider of information technology and consulting services for federal and commercial clients.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Vanguard Management Solutions, INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	8 contacts →
	Exact match “Vanguard Management Solutions (VMGTS) is a minority-owned cybersecurity and technology firm serving government and commercial organizations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	EKO Strategies, LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	7 contacts →
	Exact match “When it comes to technology, one thing for certain is that nothing is going to stay the same.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Green Elephant LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	1-10	6 contacts →
	Exact match “Green Elephant is now Veloraa.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Rcsi SBA 8 A Certified Edwosb	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	5 contacts →
	Exact match “Established in 2011, Ryansh Corporate Solutions, LLC.(RCSI) is an SBA 8(a) Certified and Economically Disadvantaged Women-Owned Small Business (EDWOSB) dedicated to expertly…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Clarus Consulting LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	5 contacts →
	Exact match “Clarus Consulting was created as a Limited Liability Company in Virginia in April Clarus has private clients in financial services, education finance, information technology, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Excelsior Consulting Group, LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	4 contacts →
	Exact match “Excelsior Consulting Group LLC is a Woman and Minority owned SBA 8(m) business with a pending application for SBA 8(a) certification.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Gray Rock Consulting LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	1-10	3 contacts →
	Exact match “Gray Rock Consulting LLC is a small business based in the Washington DC metro area providing high-quality management consulting and technology services to the Federal government…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Itnomics	Exact match	Fairfax, United StatesHQ recorded Sep 21, 2026	11-50	3 contacts →
	Exact match “At ITnomics we help companies in businesses across major industries, from emerging growth companies to global powerhouses, deal with a broad range of business and technology…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Voltsit	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	11-50	1 contacts →
	Exact match “Voltsit is a Global Business Consulting company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Chantilly Solutions Group, LLC	Exact match	Fairfax, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “Chantilly Solutions Group is a Veterans Administration Certified.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Trugrit Partners	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “TruGrit Partners has worked with clients, big and small, in a host of different industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	EON Logics	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “We are a team of experienced management trainers and advisors committed to helping organizations improve their performance and achieve their goals.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	VCJ Consulting LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 21, 2026	1-10	1 contacts →
	Exact match “VCJ exists because inspiration fades by Friday, but infrastructure compounds for years.” 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 “big 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 46 big consulting firms based in Fairfax, United States

See the full list, filter by size, metro and specialty, and access 283 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Big consulting firms based in Fairfax, United States at a glance

As of Sep 21, 2026

20.4%Verified-email coverage

30.1Average contacts per company

11-50Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Fairfax, so it is reported there. Company counts and contact totals on this page are exact for Fairfax, over 46 companies.

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.
What qualifies: Company records associated with Fairfax, United States whose business descriptions match “big 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 283 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.

Big consulting firms by metro in the United States

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 “big consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many big consulting firms are there based in Fairfax, United States?

RevenueBase identified 46 company matches for big consulting firms associated with Fairfax, United States 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?

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

Which city in the United States has the most big consulting firms?

New York leads the United States with 334 company records, followed by Washington (224) and Chicago (195). Fairfax has 46.

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 283 professional contacts with verified work emails tracked across these 46 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.