Company lists · Data refreshed September 2026
Top 25 Big consulting firms based in Fairfax, United States
RevenueBase identified 46 big consulting firms headquartered in Fairfax, United States as of September 2026 and tracks 1,386 professional contacts across them, including 283 with verified work emails. New York is the largest hub.
This list covers big consulting firms headquartered in Fairfax, 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.
The 25 largest big consulting firms based in Fairfax, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 205 contacts → | ||||
Indirect evidence “INTEGRITYOne Partners is a business and technology services company delivering mission-critical results to leaders working on our nation’s top priorities.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 190 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 140 contacts → | ||||
Indirect evidence “Kforce Government Solutions, Inc.(KGS) is a provider of financial management, transformation management, and technology solutions to the government.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 118 contacts → | ||||
Partial evidence “McKing Consulting Corporation provides a variety of general and specialized management consulting services to the federal government, state agencies, nonprofits, and public and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 98 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 92 contacts → | ||||
Indirect evidence “Metronome partners with federal customers to lead them on the Digital Transformation journey.and we will get them there lightning-fast.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 91 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 70 contacts → | ||||
Indirect evidence “When organizations need to be on time-and on budget-they call InfoReliance.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 57 contacts → | ||||
Indirect evidence “Enterprise Resource Performance Inc.(ERPi) is a professional services rm that delivers strategic, advisory, technological, and implementation support services to Federal Agencies.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 13 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 11 contacts → | ||||
Partial evidence “In 1994 Gunnison Consulting Group began serving the greater Washington, D.C.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 9 contacts → | ||||
Partial evidence “Advance Digital Systems (ADS) is a leading provider of information technology and consulting services for federal and commercial clients.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 8 contacts → | ||||
Indirect evidence “Vanguard Management Solutions (VMGTS) is a minority-owned cybersecurity and technology firm serving government and commercial organizations.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 7 contacts → | ||||
Indirect evidence “When it comes to technology, one thing for certain is that nothing is going to stay the same.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 6 contacts → | ||||
Indirect evidence “Green Elephant is now Veloraa.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 5 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Partial evidence “Excelsior Consulting Group LLC is a Woman and Minority owned SBA 8(m) business with a pending application for SBA 8(a) certification.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Partial evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Indirect evidence “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…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1 contacts → | ||||
Partial evidence “Voltsit is a Global Business Consulting company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1 contacts → | ||||
Indirect evidence “Chantilly Solutions Group is a Veterans Administration Certified.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1 contacts → | ||||
Partial evidence “TruGrit Partners has worked with clients, big and small, in a host of different industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1 contacts → | ||||
Indirect evidence “We are a team of experienced management trainers and advisors committed to helping organizations improve their performance and achieve their goals.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence “VCJ exists because inspiration fades by Friday, but infrastructure compounds for years.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: big 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 big consulting firms.
- Partial evidence
- Its own public description names part of big consulting firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name big 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 46 big consulting firms based in Fairfax, United States
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Big consulting firms based in Fairfax, United States at a glance
As of Sep 21, 2026Companies by employee count
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
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among big 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 Fairfax, United States whose own description of what they do matches “big 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 big 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 big consulting firms, and records with no verified work email. Companies headquartered outside Fairfax 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, 283 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.
Big consulting firms by metro in the United States
- Big consulting firms in New York303
- Big consulting firms in Washington224
- Big consulting firms in Chicago195
- Big consulting firms in Atlanta193
- Big consulting firms in Houston157
- Big consulting firms in Dallas120
- Big consulting firms in Miami111
- Big consulting firms in Los Angeles100
- Big consulting firms in San Francisco88
- Big consulting firms in Austin86
- Big consulting firms in Arlington82
- Big consulting firms in Boston78
- Big consulting firms in Denver77
- Big consulting firms in Seattle75
- Big consulting firms in San Diego65
- Big consulting firms in Minneapolis61
- Big consulting firms in Reston60
- Big consulting firms in Charlotte56
- Big consulting firms in Mclean56
- Big consulting firms in Alexandria52
- Big consulting firms in Tampa51
- Big consulting firms in Fairfax46
- Big consulting firms in Phoenix43
- Big consulting firms in Portland42
- Big consulting firms in Philadelphia41
- Big consulting firms in Irvine40
- Big consulting firms in Columbus39
- Big consulting firms in Sacramento38
- Big consulting firms in Orlando36
- Big consulting firms in Vienna35
- Big consulting firms in Herndon34
- Big consulting firms in Las Vegas34
- Big consulting firms in Rockville34
- Big consulting firms in Bethesda33
- Big consulting firms in Alpharetta31
- Big consulting firms in Ashburn31
- Big consulting firms in Frisco31
- Big consulting firms in New York City31
- Big consulting firms in Indianapolis30
- Big consulting firms in Plano30
- Big consulting firms in Raleigh30
- Big consulting firms in San Antonio30
- Big consulting firms in Irving29
- Big consulting firms in Jacksonville29
- Big consulting firms in Bellevue28
- Big consulting firms in Baltimore27
- Big consulting firms in Cincinnati27
- Big consulting firms in Cleveland27
- Big consulting firms in Leesburg26
- Big consulting firms in Nashville26
- Big consulting firms in Fort Lauderdale25
- Big consulting firms in Richmond25
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 big 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 big consulting firms are there based in Fairfax, United States?
RevenueBase identified 46 big consulting firms headquartered in Fairfax, 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?
Integrityone Partners, headquartered in Fairfax, tops this list with the largest team on record.
Which city has the most big consulting firms?
New York leads with 303 headquartered companies, followed by Washington (224) and Chicago (195).
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 283 verified decision-maker contacts tracked across these 46 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.
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