Company lists · Data refreshed September 2026

Top 25 Federal government contractors based in Washington, United States

Name: Federal government contractors based in Washington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 130 companies tracked

RevenueBase identified 130 federal government contractors headquartered in Washington, United States as of September 2026 and tracks 3,126 professional contacts across them, including 838 with verified work emails. Washington is the largest hub.

This list covers federal government contractors 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 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 16, 2026 86% judged on-target in blind review

130Companies

3,126Contacts tracked

838Verified emails

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The 25 largest federal government contractors based in Washington, United States

Ranked by team size

Top 25 of 130 federal government contractors based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to federal government contractors: 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	Computer World Services Corp. CWS	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	314 contacts →
	Indirect evidence “With over 30 years of hands-on experience, Computer World Services Corp.” Source: RevenueBase Database · checked Sep 16, 2026
2	TCG	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	263 contacts →
	Indirect evidence “Traditional we are not.” Source: RevenueBase Database · checked Sep 16, 2026
3	The Columbia Group	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	501-1,000	147 contacts →
	Strong evidence “The Columbia Group is a premier federal services support company with a successful history of providing the United States government with program management, acquisition…” Source: RevenueBase Database · checked Sep 16, 2026
4	CGS Federal Contact Government Services	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	141 contacts →
	Partial evidence “Contact Government Services strives to simplify and enhance government bureaucracy through the optimization of human, technical, and financial resources.” Source: RevenueBase Database · checked Sep 16, 2026
5	Analytica	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	135 contacts →
	Indirect evidence “Analytica is an award-winning consulting and technology services provider that supports public-sector health, civilian, and national security.” Source: RevenueBase Database · checked Sep 16, 2026
6	DHA Group, INC	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	135 contacts →
	Strong evidence “DHA is a full-service Information Technology and Consulting firm dedicated to providing mission-critical services to our Federal Government and commercial clients.” Source: RevenueBase Database · checked Sep 16, 2026
7	Venesco, LLC	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	120 contacts →
	Strong evidence “Venesco, LLC is a premier government contractor delivering Healthcare, IT, Research & Development, and a range of mission‑critical services to federal agencies.” Source: RevenueBase Database · checked Sep 16, 2026
8	Integrated Finance & Accounting Solutions Ifas	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	111 contacts →
	Indirect evidence “IFAS is a professional services firm that leverages technology to provide integrated financial management solutions and capabilities that include Program Budgeting & Cost…” Source: RevenueBase Database · checked Sep 16, 2026
9	Martek Global	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	105 contacts →
	Indirect evidence “From breaking ground to gaining ground, Martek works with organizations to help them move, grow, and excel by becoming your organization's right hand assistant.” Source: RevenueBase Database · checked Sep 16, 2026
10	Arlo Solutions	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	100 contacts →
	Partial evidence “Arlo Solutions (Arlo), is a Washington, DC professional services company, providing cybersecurity and management consulting services to the US government in the defense…” Source: RevenueBase Database · checked Sep 16, 2026
11	Simple Technology Solutions	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	90 contacts →
	Strong evidence “Simple Technology Solutions (STS) has in-depth experience helping federal & state government agencies in their Agile/DevOps/Cloud adoption & transformation.” Source: RevenueBase Database · checked Sep 16, 2026
12	Veracity Engineering	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	80 contacts →
	Indirect evidence “Since 2001, Veracity Engineering has been successful in building, growing, and performing on a portfolio of technically challenging engineering and program management engagements…” Source: RevenueBase Database · checked Sep 16, 2026
13	Tsymmetry	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	79 contacts →
	Partial evidence “You need more than a contractor.” Source: RevenueBase Database · checked Sep 16, 2026
14	Patrona Corporation	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	69 contacts →
	Strong evidence “Patrona Corporation is a DoD federal contractor providing program management, engineering, strategic and operational planning, quality assurance, financial management, and…” Source: RevenueBase Database · checked Sep 16, 2026
15	B360 Bizsolutions 360 INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	58 contacts →
	Indirect evidence “BizSolutions 360 Inc.” Source: RevenueBase Database · checked Sep 16, 2026
16	Parker Tide LLC	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	58 contacts →
	Partial evidence “For over 20 years, Parker Tide has provided human resources support, personnel security, strategic solutions, and staff augmentation, nationwide to Federal customers.” Source: RevenueBase Database · checked Sep 16, 2026
17	Banner Staffing	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	n/a	49 contacts →
	Indirect evidence “Banner Staffing LLC is a high-quality provider of Professional, Management and Administrative support services.” Source: RevenueBase Database · checked Sep 16, 2026
18	Prosource360 Consulting Services	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	47 contacts →
	Partial evidence “Founded in 2011, ProSource360 is a premier professional, healthcare and technology services consulting firm supporting federal and commercial markets.” Source: RevenueBase Database · checked Sep 16, 2026
19	Trust Consulting Services INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	201-500	42 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 16, 2026
20	Polycon Solutions	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	51-200	38 contacts →
	Indirect evidence “PolyCon Solutions is a certified participant of the U.S.” Source: RevenueBase Database · checked Sep 16, 2026
21	Iuvo Systems	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	36 contacts →
	Strong evidence “At Iuvo Systems Inc, we empower government contractors and federal agencies to succeed by delivering specialized accounting, compliance, and business solutions tailored to the…” Source: RevenueBase Database · checked Sep 16, 2026
22	Verium	Strong evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	n/a	31 contacts →
	Strong evidence “Verium is a privately-owned firm offering professional IT services and solutions to federal, state and local government clients.” Source: RevenueBase Database · checked Sep 16, 2026
23	Ip-Plus Consulting, INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “iP-PLUS CONSULTING is an IT solutions company that focuses on providing high quality professionals, innovative technical solutions, and delivering exceptional service support to…” Source: RevenueBase Database · checked Sep 16, 2026
24	Teamgov, INC	Partial evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	1-10	25 contacts →
	Partial evidence “Team GOV is leading provider of project management, staffing augmentation, IT, telecommunications and procurement services for a variety of government and commercial customers.” Source: RevenueBase Database · checked Sep 16, 2026
25	Tarkik Solutions	Indirect evidence	Washington, DC, United StatesHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “Tarkik Solutions (Tarkik) is an SBA 8(a) certified small business that provides information technology, management, and strategy consulting services to public sector clients.” Source: RevenueBase Database · checked Sep 16, 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 government contractors. 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 government contractors.
Partial evidence: Its own public description names part of federal government contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name federal government contractors. 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 130 federal government contractors based in Washington, United States

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Federal government contractors based in Washington, United States at a glance

As of Sep 16, 2026

26.8%Verified-email coverage

24.0Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · Washington

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

10001+

Email recency for this list is measured across the whole United States list rather than for Washington, so it is reported there. Company counts and contact totals on this page are exact for Washington, over 130 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 government contractors, 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 Washington, United States whose own description of what they do matches “federal government contractors”. 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 government contractors), 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 government contractors, 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 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, 838 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 16, 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 government contractors 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 government contractors, 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 government contractors are there based in Washington, United States?

RevenueBase identified 130 federal government contractors 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 federal government contractors?

Washington leads with 130 headquartered companies, followed by Reston (84) and Alexandria (64).

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 838 verified decision-maker contacts tracked across these 130 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 16, 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.