Company lists · Data refreshed September 2026

Top 25 IT service management consulting firms based in Fairfax, United States

Name: IT service management 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 4, 2026 59 companies tracked

RevenueBase identified 59 IT service management consulting firms headquartered in Fairfax, United States as of September 2026 and tracks 2,128 professional contacts across them, including 421 with verified work emails. New York is the largest hub.

This list covers IT service management 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, how directly it supports the match, and when it was last checked. Data refreshed September 4, 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 HQ checked on every row Match evidence on every row Refreshed Sep 4, 2026 86% judged on-target in blind review

59Companies

2,128Contacts tracked

421Verified emails

Unlock all 59 companies Free signup · no credit card · 500 free credits

The 25 largest IT service management consulting firms based in Fairfax, United States

Ranked by team size

Top 25 of 59 IT service management consulting firms based in Fairfax, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT service management consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	IonideaIndirect evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	780
	Source: company website · checked Sep 4, 2026
2	Nationwide IT Services, INCPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	201-500	194
	“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: company website · checked Sep 4, 2026
3	Concept Plus, LLCIndirect evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	201-500	168
	“Concept Plus is a technology services company offering deep technical expertise, an experienced team, and a dedication to maximizing business productivity.” Source: company website · checked Sep 4, 2026
4	Hadiamondstar Software Solutions LLCStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	51-200	99
	“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: company website · checked Sep 4, 2026
5	Widelity, INCPartial evidence	Fairfax, United StatesHQ checked Sep 4, 2026	51-200	91
	“Founded in 2006, Widelity is a leading provider of business and network engineering consulting to global technology driven industries.” Source: company website · checked Sep 4, 2026
6	InalabStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	51-200	90
	“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: company website · checked Sep 4, 2026
7	Luzon Technologies INCIndirect evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	51-200	65
	“We RECRUIT, We TRAIN, and We STAFF Transforming Challenges into Opportunities!” Source: company website · checked Sep 4, 2026
8	ERPIIndirect evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	201-500	58
	“Enterprise Resource Performance Inc.(ERPi) is a professional services rm that delivers strategic, advisory, technological, and implementation support services to Federal Agencies.” Source: company website · checked Sep 4, 2026
9	M3 Technology Consultants, INCPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	28
	“Trust Your IT Systems to Work.” Source: company website · checked Sep 4, 2026
10	Galaxy Infotech INCPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	26
	“Galaxy Infotech is a US based Staffing firm Headquartered in Fairfax, VA which provides high quality IT consultants to our clients.” Source: company website · checked Sep 4, 2026
11	TellengerPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	13
	“Tellenger specializes in software development, enterprise IT and cloud solutions.” Source: company website · checked Sep 4, 2026
12	Symposit LLCStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	12
	“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: company website · checked Sep 4, 2026
13	Tharu Technologies LLCStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	10
	“Tharu Technologies is a Global IT professional consulting Company.” Source: company website · checked Sep 4, 2026
14	Advance Digital SystemsPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	51-200	9
	“Advance Digital Systems (ADS) is a leading provider of information technology and consulting services for federal and commercial clients.” Source: company website · checked Sep 4, 2026
15	Vanguard Management Solutions, INCPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	8
	“Vanguard Management Solutions (VMGTS) is a minority-owned cybersecurity and technology firm serving government and commercial organizations.” Source: company website · checked Sep 4, 2026
16	Leland TechnologyStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	1-10	5
	“Leland Technology offers end-to-end, enterprise-class, secure IT support and consulting, including cloud solutions, managed services, internet telephony, and more.” Source: company website · checked Sep 4, 2026
17	TechclarityIndirect evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	1-10	5
	“Since 2003, TechClarity has served as a trusted partner to small- and medium-sized businesses across the Washington, DC metropolitan area.” Source: company website · checked Sep 4, 2026
18	Clarus Consulting LLCPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	5
	“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: company website · checked Sep 4, 2026
19	Gyanni INCStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	1-10	5
	“Gyanni Inc, founded in is a certified small business minority woman owned company that provides information technology and management consulting Services to the Federal and State…” Source: company website · checked Sep 4, 2026
20	AMS Experts IT ConsultingStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	4
	“AMS Experts is a leading IT consulting firm committed to providing innovative solutions for associations, nonprofits, and other organizations.” Source: company website · checked Sep 4, 2026
21	CodifyiqIndirect evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	1-10	4
	“CodifyIQ is a technology consultancy that passionately helps companies realize their strategic technology goals.” Source: company website · checked Sep 4, 2026
22	Excelsior Consulting Group, LLCPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	4
	“Excelsior Consulting Group LLC is a Woman and Minority owned SBA 8(m) business with a pending application for SBA 8(a) certification.” Source: company website · checked Sep 4, 2026
23	ItnomicsIndirect evidence	Fairfax, United StatesHQ checked Sep 4, 2026	11-50	3
	“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: company website · checked Sep 4, 2026
24	Gilmer VisionStrong evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	1-10	3
	“As a privately held company based in Virginia, Gilmer Vision offers regional IT consulting, staffing, and project management services for a variety of different business types.” Source: company website · checked Sep 4, 2026
25	VoltsitPartial evidence	Fairfax, VA, United StatesHQ checked Sep 4, 2026	11-50	1
	“Voltsit is a Global Business Consulting company.” Source: company website · checked Sep 4, 2026

Showing 25 of 59 IT service management consulting firms based in Fairfax, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 421 reachable decision-makers.

Free signup · no credit card

See all 59 companies

IT service management consulting firms based in Fairfax, United States at a glance

As of Sep 4, 2026

11-50Median size (employees)

New YorkLargest hub · 650 HQs

Contacts with mobile numbers

Sep 4, 2026Data 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 this city, so it is reported there. Company counts and contact totals on this page are exact for Fairfax, over 59 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 service management consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 service management consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among IT service management 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 an evidence 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, 421 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 4, 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 service management consulting firms by metro in the United States

Frequently asked

How many IT service management consulting firms are there based in Fairfax, United States?

RevenueBase identified 59 IT service management 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?

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

Which city has the most IT service management consulting firms?

New York leads with 650 headquartered companies, followed by Houston (429) and Atlanta (377).

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 421 verified decision-maker contacts tracked across these 59 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 4, 2026.

Ready to reach these companies? Verified emails and direct dials for all 59 IT service management consulting firms based in Fairfax, United States. Start with a free account, no credit card.

Get the full list

Related lists

IT service management consulting firms by geography

Browse the directory

Browse: Companies home · IT service management consulting firms in United States · All United States lists · All IT service management consulting firms lists · New lists

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.