Company lists · Data refreshed September 2026

Top 19 IT consulting services based in Washington, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 344 companies tracked

RevenueBase identified 344 IT consulting services headquartered in Washington, United States as of September 2026 and tracks 4,829 professional contacts across them, including 1,372 with verified work emails. New York is the largest hub.

This list covers IT consulting services headquartered in Washington, 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

344Companies

4,829Contacts tracked

1,372Verified emails

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The 19 largest IT consulting services based in Washington, United States

Ranked by team size

Top 19 of 344 IT consulting services based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT consulting services: 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	Computer World Services Corp. CWSIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	201-500	316
	“With over 30 years of hands-on experience, Computer World Services Corp.” Source: company website · checked Sep 4, 2026
2	Techunity, INCIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	157
	Source: company website · checked Sep 4, 2026
3	DHA Group, INCPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	201-500	135
	“DHA is a full-service Information Technology and Consulting firm dedicated to providing mission-critical services to our Federal Government and commercial clients.” Source: company website · checked Sep 4, 2026
4	AnalyticaPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	133
	“Analytica is an award-winning consulting and technology services provider that supports public-sector health, civilian, and national security.” Source: company website · checked Sep 4, 2026
5	Networking For Future NFFIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	108
	“Since 1996, Networking For Future, Inc.(NFF) has been engineering the backbone of mission-critical systems for government and enterprise clients.” Source: company website · checked Sep 4, 2026
6	Arlo SolutionsPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	101
	“Arlo Solutions (Arlo), is a Washington, DC professional services company, providing cybersecurity and management consulting services to the US government in the defense…” Source: company website · checked Sep 4, 2026
7	Blue Water ThinkingIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	91
	“Strategy, Management and Technology Consultancy” Source: company website · checked Sep 4, 2026
8	TsymmetryIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	78
	“You need more than a contractor.” Source: company website · checked Sep 4, 2026
9	Business Technology IntegratorsPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	72
	“BTI is a proud Service-Disabled Veteran-Owned Small Business (SDVOSB) with 25 years in business and trusted federal partner delivering mission-focused technology and consulting…” Source: company website · checked Sep 4, 2026
10	Longevity ConsultingStrong evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	71
	“Longevity Consulting is a customer-focused strategic management and IT consulting firm that helps federal agencies achieve mission objectives, improve outcomes, and strengthen…” Source: company website · checked Sep 4, 2026
11	Metis StrategyIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	53
	“Operating at the intersection of technology, business, and innovation, Metis Strategy propels decision-makers forward with pragmatic solutions, actionable insights, and access to…” Source: company website · checked Sep 4, 2026
12	Prosource360 Consulting ServicesPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	48
	“Founded in 2011, ProSource360 is a premier professional, healthcare and technology services consulting firm supporting federal and commercial markets.” Source: company website · checked Sep 4, 2026
13	Cascades Technologies, INCStrong evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	47
	“Cascades Technologies is a Professional Consulting and IT Services firm with a commitment to personal and profession integrity.” Source: company website · checked Sep 4, 2026
14	Digidoc, Inc. DBA Public Sector Solutions GroupPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	44
	“The Public Sector Solutions Group is an award-winning Information Technology consulting firm with an emphasis on access to real-time information and an enhanced user experience.” Source: company website · checked Sep 4, 2026
15	Trust Consulting Services INCIndirect evidence	Washington, United StatesHQ checked Sep 4, 2026	201-500	41
	“We bring an experience unmatched anywhere else, with knowledgeable and thoughtful consultants plus flexible, tailored approaches, all centered on the right outcomes for your…” Source: company website · checked Sep 4, 2026
16	Avid Systems LLCPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	36
	“Avid Systems LLC is a woman-owned Information Technology Services firm based in Washington, DC, with over 20 years of proven expertise in delivering transformative IT solutions.” Source: company website · checked Sep 4, 2026
17	Iron Vine SecurityIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	34
	“Iron Vine is now a part of the ECS team!” Source: company website · checked Sep 4, 2026
18	HekimaPartial evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	11-50	32
	“At Hekima, we’re redefining how organizations approach IT solutions.” Source: company website · checked Sep 4, 2026
19	Compass SolutionsIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	51-200	31
	“Compass Solutions, LLC is a leading Information Technology company that delivers technology solutions that fit the business model of its clients.” Source: company website · checked Sep 4, 2026

Showing 19 of 344 IT consulting services based in Washington, United States

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IT consulting services based in Washington, United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 976 HQs

Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

189

11-50

102

51-200

201-500

501-1,000

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 Washington, over 344 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 services, 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 Washington, United States whose own description of what they do matches “IT consulting services”. 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 consulting services, and records with no verified work email. Companies headquartered outside Washington 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, 1,372 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 consulting services by metro in the United States

Frequently asked

How many IT consulting services are there based in Washington, United States?

RevenueBase identified 344 IT consulting services headquartered in Washington, 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?

Computer World Services Corp. CWS, headquartered in Washington, tops this list with the largest team on record.

Which city has the most IT consulting services?

New York leads with 976 headquartered companies, followed by Houston (633) and Atlanta (521).

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 1,372 verified decision-maker contacts tracked across these 344 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.

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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.