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Company lists · Data refreshed September 2026

Top 25 IT consulting and support companies based in Fairfax, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 64 companies tracked

RevenueBase identified 64 IT consulting and support companies headquartered in Fairfax, United States as of September 2026 and tracks 2,079 professional contacts across them, including 386 with verified work emails. New York is the largest hub.

This list covers IT consulting and support companies 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 27, 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 27, 2026 86% judged on-target in blind review
64Companies
2,079Contacts tracked
386Verified emails
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The 25 largest IT consulting and support companies based in Fairfax, United States

Ranked by team size
Top 25 of 64 IT consulting and support companies based in Fairfax, United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to IT consulting and support companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
Ionidea
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 20261,001-5,000784 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026
2
Concept Plus, LLC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 2026201-500168 contacts →

Indirect evidence

“Concept Plus is a technology services company offering deep technical expertise, an experienced team, and a dedication to maximizing business productivity.”

Source: RevenueBase Database · checked Sep 27, 2026
3
ICS Nett, Inc. ICS
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-200140 contacts →

Indirect evidence

“ICS is a strategically diversified technology solutions company operating in different markets serving both Federal and Commercial clients with innovations that span…”

Source: RevenueBase Database · checked Sep 27, 2026
4
Hadiamondstar Software Solutions LLC
Strong evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-20098 contacts →

Strong 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 27, 2026
5
Inalab
Strong evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-20091 contacts →

Strong 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 27, 2026
6
Right&above
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 2026201-50083 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 27, 2026
7
Inforeliance
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 2026201-50070 contacts →

Indirect evidence

“When organizations need to be on time-and on budget-they call InfoReliance.”

Source: RevenueBase Database · checked Sep 27, 2026
8
Luzon Technologies INC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-20065 contacts →

Indirect evidence

“We RECRUIT, We TRAIN, and We STAFF Transforming Challenges into Opportunities!”

Source: RevenueBase Database · checked Sep 27, 2026
9
Codeplus
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-20046 contacts →

Indirect evidence

“At CODEplus, we go beyond traditional technology providers to become your dedicated solution partner.”

Source: RevenueBase Database · checked Sep 27, 2026
10
Comter Systems INC
Strong evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-5029 contacts →

Strong evidence

“Comter Systems is a transformational IT services company which supports federal agencies, commercial enterprises, and non-profit organizations.”

Source: RevenueBase Database · checked Sep 27, 2026
11
M3 Technology Consultants, INC
Partial evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-5028 contacts →

Partial evidence

“Trust Your IT Systems to Work.”

Source: RevenueBase Database · checked Sep 27, 2026
12
Vizens Corp
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-20019 contacts →

Indirect evidence

“VIZENS Corp is Software development & services company.”

Source: RevenueBase Database · checked Sep 27, 2026
13
Tellenger
Partial evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-5013 contacts →

Partial evidence

“Tellenger specializes in software development, enterprise IT and cloud solutions.”

Source: RevenueBase Database · checked Sep 27, 2026
14
Symposit LLC
Partial evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-5013 contacts →

Partial 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 27, 2026
15
Sysalgo Technologies
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-20010 contacts →

Indirect evidence

“We help Clients implement today’s latest Digital Technologies to Innovate, Transform and rapidly Grow.”

Source: RevenueBase Database · checked Sep 27, 2026
16
Tharu Technologies LLC
Strong evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-5010 contacts →

Strong evidence

“Tharu Technologies is a Global IT professional consulting Company.”

Source: RevenueBase Database · checked Sep 27, 2026
17
Advance Digital Systems
Partial evidenceFairfax, VA, United StatesHQ checked Sep 27, 202651-2009 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 27, 2026
18
Vanguard Management Solutions, INC
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-508 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 27, 2026
19
Invex Technology Solutions
Partial evidenceFairfax, VA, United StatesHQ checked Sep 27, 20261-106 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 27, 2026
20
Techclarity
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 20261-105 contacts →

Indirect evidence

“Since 2003, TechClarity has served as a trusted partner to small- and medium-sized businesses across the Washington, DC metropolitan area.”

Source: RevenueBase Database · checked Sep 27, 2026
21
Leland Technology
Strong evidenceFairfax, VA, United StatesHQ checked Sep 27, 20261-105 contacts →

Strong evidence

“Leland Technology offers end-to-end, enterprise-class, secure IT support and consulting, including cloud solutions, managed services, internet telephony, and more.”

Source: RevenueBase Database · checked Sep 27, 2026
22
Codifyiq
Indirect evidenceFairfax, VA, United StatesHQ checked Sep 27, 20261-104 contacts →

Indirect evidence

“CodifyIQ is a technology consultancy that passionately helps companies realize their strategic technology goals.”

Source: RevenueBase Database · checked Sep 27, 2026
23
Excelsior Consulting Group, LLC
Partial evidenceFairfax, VA, United StatesHQ checked Sep 27, 202611-504 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 27, 2026
24
Msnet Solutions, LLC
Strong evidenceFairfax, VA, United StatesHQ checked Sep 27, 20261-103 contacts →

Strong evidence

“MSNET SOLUTIONS is owned and operated by professional IT consultants who know what it takes to design, implement, and support secure networks utilizing the latest technologies…”

Source: RevenueBase Database · checked Sep 27, 2026
25
Itnomics
Indirect evidenceFairfax, United StatesHQ checked Sep 27, 202611-503 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 27, 2026

Showing 25 of 64 IT consulting and support companies based in Fairfax, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 386 reachable decision-makers.

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IT consulting and support companies based in Fairfax, United States at a glance

As of Sep 27, 2026
18.6%Verified-email coverage
32.5Average contacts per company
1-10Median size (employees)
907.8%Largest-city concentration · New York
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
32
11-50
16
51-200
10
201-500
4
1,001-5,000
1

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 IT consulting and support companies, 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 “IT consulting and support companies”. 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 IT consulting and support companies), 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 IT consulting and support companies, 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, 386 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 27, 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.

IT consulting and support companies 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 IT consulting and support companies, 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 IT consulting and support companies are there based in Fairfax, United States?

RevenueBase identified 64 IT consulting and support companies 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?

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

Which city has the most IT consulting and support companies?

New York leads with 581 headquartered companies, followed by Houston (446) and Dallas (310).

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 386 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 27, 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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