Company lists · Data refreshed September 2026

Top 25 IT project management consulting services based in Fairfax, United States

Name: IT project management consulting services 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 47 companies tracked

RevenueBase identified 47 IT project management consulting services headquartered in Fairfax, United States as of September 2026 and tracks 1,403 professional contacts across them, including 327 with verified work emails. Across the United States, New York is the largest hub for this category (393 companies); Fairfax has 47.

This list covers IT project management consulting services 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

47Companies

1,403Contacts tracked

327Verified emails

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The 25 largest IT project management consulting services based in Fairfax, United States

Ranked by team size

Top 25 of 47 IT project management consulting services 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 project management consulting services: 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	Nationwide IT Services, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	201-500	190 contacts →
	Partial 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 27, 2026
2	Concept Plus, LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	201-500	168 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	Mcking Consulting	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	51-200	118 contacts →
	Strong 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 27, 2026
4	Hadiamondstar Software Solutions LLC	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	51-200	98 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 evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	51-200	91 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 evidence	Fairfax, VA, United StatesHQ checked Sep 27, 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 27, 2026
7	PSI International, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	51-200	71 contacts →
	Partial evidence “PSI INTERNATIONAL, Inc.(PSI) provides a blend of information technology (IT), health science, and social services support to clients throughout the world.” Source: RevenueBase Database · checked Sep 27, 2026
8	Inforeliance	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	201-500	70 contacts →
	Indirect evidence “When organizations need to be on time-and on budget-they call InfoReliance.” Source: RevenueBase Database · checked Sep 27, 2026
9	Luzon Technologies INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	51-200	65 contacts →
	Indirect evidence “We RECRUIT, We TRAIN, and We STAFF Transforming Challenges into Opportunities!” Source: RevenueBase Database · checked Sep 27, 2026
10	ERPI	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 27, 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 27, 2026
11	M3 Technology Consultants, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	28 contacts →
	Partial evidence “Trust Your IT Systems to Work.” Source: RevenueBase Database · checked Sep 27, 2026
12	Tellenger	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	13 contacts →
	Partial evidence “Tellenger specializes in software development, enterprise IT and cloud solutions.” Source: RevenueBase Database · checked Sep 27, 2026
13	Symposit LLC	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	13 contacts →
	Strong 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
14	Gunnison Consulting Group, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	201-500	11 contacts →
	Partial evidence “In 1994 Gunnison Consulting Group began serving the greater Washington, D.C.” Source: RevenueBase Database · checked Sep 27, 2026
15	Advance Digital Systems	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	51-200	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 27, 2026
16	Vanguard Management Solutions, INC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	8 contacts →
	Partial 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
17	EKO Strategies, LLC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	7 contacts →
	Partial evidence “When it comes to technology, one thing for certain is that nothing is going to stay the same.” Source: RevenueBase Database · checked Sep 27, 2026
18	Genco Systems INC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	6 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026
19	Green Elephant LLC	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	1-10	6 contacts →
	Indirect evidence “Green Elephant is now Veloraa.” Source: RevenueBase Database · checked Sep 27, 2026
20	Clarus Consulting LLC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 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 27, 2026
21	Excelsior Consulting Group, LLC	Partial evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	11-50	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 27, 2026
22	Gray Rock Consulting LLC	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	1-10	3 contacts →
	Strong 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 27, 2026
23	Gilmer Vision	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	1-10	3 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 27, 2026
24	Information Technology Solution Acquisition & Management, INC	Strong evidence	Fairfax, VA, United StatesHQ checked Sep 27, 2026	1-10	2 contacts →
	Strong evidence “ITSAMI provides full Information Technology (IT) project life-cycle expertise to clients, starting with assisting their efforts entering into the Government marketplace…” Source: RevenueBase Database · checked Sep 27, 2026
25	Chantilly Solutions Group, LLC	Indirect evidence	Fairfax, United StatesHQ checked Sep 27, 2026	1-10	1 contacts →
	Indirect evidence “Chantilly Solutions Group is a Veterans Administration Certified.” Source: RevenueBase Database · checked Sep 27, 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: IT project management consulting services. 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 IT project management consulting services.
Partial evidence: Its own public description names part of IT project management consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT project management consulting services. 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 47 IT project management consulting services based in Fairfax, United States

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IT project management consulting services based in Fairfax, United States at a glance

As of Sep 27, 2026

23.3%Verified-email coverage

29.9Average contacts per company

11-50Median size (employees)

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 47 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 project management consulting services, 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 project management consulting services”. 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 project management consulting services), 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 project management consulting services, 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, 327 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 project management consulting services 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 project management consulting services, 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 project management consulting services are there based in Fairfax, United States?

RevenueBase identified 47 IT project management consulting services 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?

Nationwide IT Services, INC, headquartered in Fairfax, tops this list with the largest team on record.

Which city in the United States has the most IT project management consulting services?

New York leads the United States with 393 headquartered companies, followed by Houston (354) and Atlanta (285). Fairfax has 47.

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 327 verified decision-maker contacts tracked across these 47 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.