Company lists · Data refreshed September 2026

Top 25 IT professional services companies based in Fairfax, United States

Name: IT professional services companies based in Fairfax, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 68 companies tracked

RevenueBase identified 68 company matches for IT professional services companies associated with Fairfax, United States as of September 2026 and tracks 2,391 professional contacts across them, including 492 with verified work emails. Across the United States, New York is the largest hub for this category (613 companies); Fairfax has 68.

This list covers company matches for IT professional services companies 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 27, 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 27, 2026 How this list was built

68Companies

2,391Contacts tracked

492Verified emails

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The 25 largest IT professional services companies based in Fairfax, United States

Ranked by team size

Top 25 of 68 company matches for IT professional services companies based in Fairfax, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 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	Ionidea	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	784 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2	Nationwide IT Services, INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
3	Concept Plus, LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	201-500	168 contacts →
	Exact match “Concept Plus is a technology services company offering deep technical expertise, an experienced team, and a dedication to maximizing business productivity.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4	ICS Nett, Inc. ICS	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	140 contacts →
	Exact match “ICS is a strategically diversified technology solutions company operating in different markets serving both Federal and Commercial clients with innovations that span…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5	Hadiamondstar Software Solutions LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
6	Inalab	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
7	Right&above	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	201-500	83 contacts →
	Exact match “Right & Above helps companies use technology and AI to improve how they work, simplify processes, and create new products faster.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8	Inforeliance	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
9	Luzon Technologies INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	65 contacts →
	Exact match “We RECRUIT, We TRAIN, and We STAFF Transforming Challenges into Opportunities!” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10	ERPI	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
11	Technova Systems	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	51 contacts →
	Exact match “TechNova Systems is a technology consulting and workforce solutions company helping organizations build, scale, and modernize with confidence for 10 Years.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12	Codeplus	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	46 contacts →
	Exact match “At CODEplus, we go beyond traditional technology providers to become your dedicated solution partner.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13	Comter Systems INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	29 contacts →
	Exact match “Comter Systems is a transformational IT services company which supports federal agencies, commercial enterprises, and non-profit organizations.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14	M3 Technology Consultants, INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	28 contacts →
	Exact match “Trust Your IT Systems to Work.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
15	Galaxy Infotech INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	25 contacts →
	Exact match “Galaxy Infotech is a US based Staffing firm Headquartered in Fairfax, VA which provides high quality IT consultants to our clients.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
16	Intellisoft Technologies	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	1,001-5,000	20 contacts →
	Exact match “Empowering Innovation with Intellisoft Technologies, Inc.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
17	XA Systems, LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	20 contacts →
	Exact match “Established leadership and innovative service delivery methods supporting a wide range of Information Technology requirements.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
18	Vizens Corp	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	19 contacts →
	Exact match “VIZENS Corp is Software development & services company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
19	Tellenger	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	13 contacts →
	Exact match “Tellenger specializes in software development, enterprise IT and cloud solutions.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
20	KEY Concepts Knowledgebase LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	12 contacts →
	Exact match “WHO ARE WE: We are a solutions driven enterprise based in the DC Area, that is founded on the provision of quality services, creatve business and IT solutions, and responsible…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
21	Information Analysis Incorporated	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	11 contacts →
	Exact match “Tellenger, Inc.(formerly Information Analysis Incorporated) is a wholly owned subsidiary subsidiary of WaveDancer, a publicly traded company (NASDAQ: WAVD), and certified small…” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
22	Sysalgo Technologies	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	51-200	10 contacts →
	Exact match “We help Clients implement today’s latest Digital Technologies to Innovate, Transform and rapidly Grow.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
23	Tharu Technologies LLC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 2026	11-50	10 contacts →
	Exact match “Tharu Technologies is a Global IT professional consulting Company.” Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
24	Advance Digital Systems	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 2026 · View company records in RevenueBase
25	Vanguard Management Solutions, INC	Exact match	Fairfax, VA, United StatesHQ recorded Sep 27, 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 27, 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 “IT professional services companies”. 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 68 IT professional services companies based in Fairfax, United States

See the full list, filter by size, metro and specialty, and access 492 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT professional services companies based in Fairfax, United States at a glance

As of Sep 27, 2026

20.6%Verified-email coverage

35.2Average contacts per company

11-50Median size (employees)

Sep 27, 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 68 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 “IT professional services companies” 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 492 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 27, 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.

IT professional services companies 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 “IT professional services companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT professional services companies are there based in Fairfax, United States?

RevenueBase identified 68 company matches for IT professional services companies 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?

Ionidea 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 IT professional services companies?

New York leads the United States with 613 company records, followed by Houston (455) and Dallas (343). Fairfax has 68.

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 492 professional contacts with verified work emails tracked across these 68 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 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 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.