Company lists · Data refreshed September 2026

Top 25 D and i consulting firms based in Fairfax, United States

Name: D and i 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 24, 2026 64 companies tracked

RevenueBase identified 64 d and i consulting firms headquartered in Fairfax, United States as of September 2026 and tracks 2,660 professional contacts across them, including 947 with verified work emails. Across the United States, New York is the largest hub for this category (1,070 companies); Fairfax has 64.

This list covers d and i 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 24, 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 24, 2026 86% judged on-target in blind review

64Companies

2,660Contacts tracked

947Verified emails

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The 25 largest d and i consulting firms based in Fairfax, United States

Ranked by team size

Top 25 of 64 d and i consulting firms based in Fairfax, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to d and i 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	3pillar	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	1,001-5,000	1,575 contacts →
	Indirect evidence “At 3Pillar, we believe something truly incredible happens at the intersection of product engineering and cognitive computing.” Source: RevenueBase Database · checked Sep 24, 2026
2	Mcking Consulting	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	51-200	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 24, 2026
3	Hadiamondstar Software Solutions LLC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	51-200	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 24, 2026
4	Widelity, INC	Partial evidence	Fairfax, United StatesHQ checked Sep 24, 2026	51-200	92 contacts →
	Partial evidence “Founded in 2006, Widelity is a leading provider of business and network engineering consulting to global technology driven industries.” Source: RevenueBase Database · checked Sep 24, 2026
5	Metronome	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	51-200	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 24, 2026
6	Right&above	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	201-500	83 contacts →
	Indirect evidence “Right & Above helps companies use technology and AI to improve how they work, simplify processes, and create new products faster.” Source: RevenueBase Database · checked Sep 24, 2026
7	Strategy Consulting Team, LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	51-200	74 contacts →
	Indirect evidence “SCT is dedicated to making a positive impact to organizations and their leaders through providing innovative and enduring solutions.” Source: RevenueBase Database · checked Sep 24, 2026
8	ERPI	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	201-500	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 24, 2026
9	Technova Systems	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	51-200	51 contacts →
	Partial evidence “TechNova Systems is a technology consulting and workforce solutions company helping organizations build, scale, and modernize with confidence for 10 Years.” Source: RevenueBase Database · checked Sep 24, 2026
10	Clearpath Global	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	31 contacts →
	Indirect evidence “Since 2006, we’ve supported our clients with customized and actionable results based on market leading research capabilities, proven analytical methodologies and wide-ranging…” Source: RevenueBase Database · checked Sep 24, 2026
11	Intellisoft Technologies	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	1,001-5,000	20 contacts →
	Indirect evidence “Empowering Innovation with Intellisoft Technologies, Inc.” Source: RevenueBase Database · checked Sep 24, 2026
12	Tellenger	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	13 contacts →
	Indirect evidence “Tellenger specializes in software development, enterprise IT and cloud solutions.” Source: RevenueBase Database · checked Sep 24, 2026
13	Watts Group, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	10 contacts →
	Indirect evidence “Founded in 2005, Watts Group has an experienced and responsive team of accounting and systems implementation experts.” Source: RevenueBase Database · checked Sep 24, 2026
14	Lumik LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	1-10	10 contacts →
	Indirect evidence “Lumik provides solutions to help your business evolve in this digital age by implementing technologies that will help you do business better.” Source: RevenueBase Database · checked Sep 24, 2026
15	BG Consulting Services, LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	201-500	10 contacts →
	Indirect evidence “The Eagle is admired world over as a symbol of power, freedom, and transcendence.” Source: RevenueBase Database · checked Sep 24, 2026
16	Sysalgo Technologies	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	51-200	10 contacts →
	Indirect evidence “We help Clients implement today’s latest Digital Technologies to Innovate, Transform and rapidly Grow.” Source: RevenueBase Database · checked Sep 24, 2026
17	Xcelerator Group	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	9 contacts →
	Indirect evidence “The Xcelerator Group was founded to help companies expand their businesses.” Source: RevenueBase Database · checked Sep 24, 2026
18	TOP Corner Consulting	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	8 contacts →
	Partial evidence “Top Corner Consulting specializes in helping organizations establish and implement clear, innovative strategies that drastically improve operations and performance.” Source: RevenueBase Database · checked Sep 24, 2026
19	Vanguard Management Solutions, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	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 24, 2026
20	Invex Technology Solutions	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	1-10	6 contacts →
	Partial evidence “We develop cost-effective innovative consulting and technology solutions to CIO’s, systems engineering and architecture organizations, and implementation teams through dependable…” Source: RevenueBase Database · checked Sep 24, 2026
21	Green Elephant LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “Green Elephant is now Veloraa.” Source: RevenueBase Database · checked Sep 24, 2026
22	Rcsi SBA 8 A Certified Edwosb	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	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 24, 2026
23	Clarus Consulting LLC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	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 24, 2026
24	Scribedoc.com, INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	11-50	5 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026
25	Codifyiq	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “CodifyIQ is a technology consultancy that passionately helps companies realize their strategic technology goals.” Source: RevenueBase Database · checked Sep 24, 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: d and i 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 d and i consulting firms.
Partial evidence: Its own public description names part of d and i consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name d and i 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 64 d and i consulting firms based in Fairfax, United States

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D and i consulting firms based in Fairfax, United States at a glance

As of Sep 24, 2026

35.6%Verified-email coverage

41.6Average contacts per company

1-10Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 64 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 d and i 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 “d and i 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 d and i 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 d and i 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, 947 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 24, 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.

D and i 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 d and i 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 d and i consulting firms are there based in Fairfax, United States?

RevenueBase identified 64 d and i 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?

3pillar, headquartered in Fairfax, tops this list with the largest team on record.

Which city in the United States has the most d and i consulting firms?

New York leads the United States with 1,070 headquartered companies, followed by Chicago (526) and Atlanta (478). Fairfax has 64.

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 947 verified decision-maker contacts tracked across these 64 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 24, 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.