Company lists · Data refreshed September 2026

Top 25 Federal IT services providers based in Mclean, United States

Name: Federal IT services providers based in Mclean, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 99 companies tracked

RevenueBase identified 99 federal IT services providers headquartered in Mclean, United States as of September 2026 and tracks 24,167 professional contacts across them, including 9,164 with verified work emails. Across the United States, Washington is the largest hub for this category (191 companies); Mclean has 99.

This list covers federal IT services providers headquartered in Mclean, 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 28, 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 28, 2026 86% judged on-target in blind review

99Companies

24,167Contacts tracked

9,164Verified emails

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The 25 largest federal IT services providers based in Mclean, United States

Ranked by team size

Top 25 of 99 federal IT services providers based in Mclean, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to federal IT services providers: 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	Guidehouse	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	10001+	12,815 contacts →
	Indirect evidence “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Source: RevenueBase Database · checked Sep 28, 2026
2	American Systems	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,899 contacts →
	Partial evidence “Founded in 1975, AMERICAN SYSTEMS is an employee-owned federal government contractor supporting national priority programs through our strategic solutions in the areas of…” Source: RevenueBase Database · checked Sep 28, 2026
3	DMI	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,683 contacts →
	Indirect evidence “DMI is a leading provider of digital services and technology solutions with a focus on end-to-end managed services, including managed mobility, cloud, cybersecurity, network…” Source: RevenueBase Database · checked Sep 28, 2026
4	22nd Century Technologies INC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,234 contacts →
	Partial evidence “22nd Century Technologies Inc,(22nd) is a mid-size Service Integrator, focused on providing IP enabled managed services and solutions to Federal, State and Local governments.” Source: RevenueBase Database · checked Sep 28, 2026
5	SMS Data Products Group, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	501-1,000	445 contacts →
	Indirect evidence “As a dynamic systems integrator, SMS offers proven solutions in engineering, operations, cybersecurity, and digital transformation.” Source: RevenueBase Database · checked Sep 28, 2026
6	Obxtek	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	349 contacts →
	Indirect evidence “OBXtek is a relationship-driven information technology and diversified professional services company.” Source: RevenueBase Database · checked Sep 28, 2026
7	AD HOC LLC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	501-1,000	333 contacts →
	Partial evidence “Ad Hoc is a digital services company that helps the federal government better serve people.” Source: RevenueBase Database · checked Sep 28, 2026
8	Intellibridge, An Agile Defense Company	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	276 contacts →
	Partial evidence “IntelliBridge, An Agile Defense Company, delivers IT strategy, cloud, cybersecurity, application, data and analytics, enterprise IT, intelligence analysis, and mission operation…” Source: RevenueBase Database · checked Sep 28, 2026
9	Zachary Piper Solutions	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	236 contacts →
	Indirect evidence “Zachary Piper Solutions (ZPS) provides technical and professional services in support of the United States government across six key sectors: Intelligence, Defense, Energy…” Source: RevenueBase Database · checked Sep 28, 2026
10	Validatek, INC	Strong evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	224 contacts →
	Strong evidence “ValidaTek is a premier government IT consulting firm based in the Washington DC area that drives technology transformation and secures mission-critical systems for our federal…” Source: RevenueBase Database · checked Sep 28, 2026
11	Cybermedia Technologies, LLC Ctec	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	223 contacts →
	Partial evidence “We modernize legacy infrastructure, secure mission-critical systems and design digital experiences that impact millions of federal workers & American citizens every day.” Source: RevenueBase Database · checked Sep 28, 2026
12	Pragmatics, LLC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	209 contacts →
	Partial evidence “Pragmatics was acquired by Integral Federal, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
13	Bart & Associates, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	187 contacts →
	Indirect evidence “Headquartered in McLean, Va, B&A is a leading information technology systems integrator providing solutions through the following service offerings: Modernization &…” Source: RevenueBase Database · checked Sep 28, 2026
14	Be, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	176 contacts →
	Indirect evidence “BE is a trusted partner on missions of vital importance to our customers, the nation and the world.” Source: RevenueBase Database · checked Sep 28, 2026
15	Immixgroup	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	170 contacts →
	Indirect evidence “immixGroup, acquired by Arrow Electronics, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
16	A-Tek, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	159 contacts →
	Indirect evidence “As a trusted services and solutions provider, A-TEK, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
17	Paradyme, A Cathexis Company	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	152 contacts →
	Partial evidence “Paradyme, a CATHEXIS company, is a next-generation technology company focused on solving the federal government's most critical challenges.” Source: RevenueBase Database · checked Sep 28, 2026
18	Valiant Solutions	Strong evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	152 contacts →
	Strong evidence “Valiant Solutions, LLC stands out as a premier provider of Cybersecurity and IT services aiding the Federal Government in staying ahead of complex information security challenges.” Source: RevenueBase Database · checked Sep 28, 2026
19	Network Designs, INC	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	152 contacts →
	Partial evidence “NDi is a Verified Service-Disabled Veteran Owned Small Business [SDVOSB] professional services firm, supporting Federal and Commercial customers since 1995.” Source: RevenueBase Database · checked Sep 28, 2026
20	Easy Dynamics Corp	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	135 contacts →
	Indirect evidence “Easy Dynamics Corporation is a leading technology services provider with a core focus in Cybersecurity, Cloud Computing, and Information Sharing.” Source: RevenueBase Database · checked Sep 28, 2026
21	Link Solutions, INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	128 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
22	Humantouch, LLC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	201-500	110 contacts →
	Indirect evidence “We bridge the gap between people & technology.” Source: RevenueBase Database · checked Sep 28, 2026
23	Saliense	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	107 contacts →
	Indirect evidence “Saliense is a high-end Technology Solutions provider based out of Tysons Corner, VA.” Source: RevenueBase Database · checked Sep 28, 2026
24	CRI	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	103 contacts →
	Indirect evidence “Communications Resource, Inc.(CRI) is a minority and Woman-Owned Small Business with over 30 years of focused security performance supporting over 40 government and commercial…” Source: RevenueBase Database · checked Sep 28, 2026
25	SE Solutions INC	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	51-200	100 contacts →
	Indirect evidence “SE Solutions, Inc.” Source: RevenueBase Database · checked Sep 28, 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: federal IT services providers. 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 federal IT services providers.
Partial evidence: Its own public description names part of federal IT services providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal IT services providers. 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 99 federal IT services providers based in Mclean, United States

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Federal IT services providers based in Mclean, United States at a glance

As of Sep 28, 2026

37.9%Verified-email coverage

244.1Average contacts per company

51-200Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for Mclean, so it is reported there. Company counts and contact totals on this page are exact for Mclean, over 99 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 federal IT services providers, 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 Mclean, United States whose own description of what they do matches “federal IT services providers”. 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 federal IT services providers), 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 federal IT services providers, and records with no verified work email. Companies headquartered outside Mclean 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, 9,164 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 28, 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.

Federal IT services providers 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 federal IT services providers, 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 federal IT services providers are there based in Mclean, United States?

RevenueBase identified 99 federal IT services providers headquartered in Mclean, 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?

Guidehouse, headquartered in Mclean, tops this list with the largest team on record.

Which city in the United States has the most federal IT services providers?

Washington leads the United States with 191 headquartered companies, followed by Reston (158) and New York (117). Mclean has 99.

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 9,164 verified decision-maker contacts tracked across these 99 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 28, 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.