Company lists · Data refreshed September 2026

Top 25 Defense contractor IT staffing companies based in the United States

RevenueBase identified 5,450 defense contractor IT staffing companies headquartered in the United States as of September 2026 and tracks 312,324 professional contacts across them, including 38,343 with verified work emails. New York is the largest hub.

This list covers defense contractor IT staffing companies headquartered in the 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
5,450Companies
312,324Contacts tracked
38,343Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest defense contractor IT staffing companies based in the United States

Ranked by team size
Top 25 of 5,450 defense contractor IT staffing companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to defense contractor IT staffing companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceFalls Church, VA, United StatesHQ checked Sep 28, 202610001+74,984 contacts →

Indirect evidence

“We are a close-knit community of big thinkers collaborating to keep the world safe.”

Source: RevenueBase Database · checked Sep 28, 2026
2Indirect evidenceFalls Church, VA, United StatesHQ checked Sep 28, 202610001+23,974 contacts →

Indirect evidence

“GDIT is a global technology and professional services company that delivers solutions, technology and mission services to every major agency across the U.S.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceReston, VA, United StatesHQ checked Sep 28, 202610001+10,793 contacts →

Indirect evidence

“At Peraton, we're at the forefront of delivering the next big thing every day.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceMclean, VA, United StatesHQ checked Sep 28, 202610001+9,964 contacts →

Indirect evidence

“DynCorp International is now part of Amentum.”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceHerndon, VA, United StatesHQ checked Sep 28, 20265,001-10,0009,697 contacts →

Indirect evidence

“MANTECH is more than a technology company.”

Source: RevenueBase Database · checked Sep 28, 2026
6Strong evidenceMorristown, NJ, United StatesHQ checked Sep 28, 20265,001-10,0003,674 contacts →

Strong evidence

“Artech is the largest Women-Owned IT Staffing Firm in the U.S, with 34+ years of experience powering workforce transformation for Fortune 500 companies and public-sector…”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceBeverly, MA, United StatesHQ checked Sep 28, 2026501-1,0002,564 contacts →

Indirect evidence

“Oxford Global Resources delivers tailored solutions for any technical challenges you are facing using our partnership-first approach.”

Source: RevenueBase Database · checked Sep 28, 2026
8Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 2026501-1,0002,128 contacts →

Indirect evidence

“We support STEM professionals looking for jobs with exceptional firms in the technology and engineering sectors.”

Source: RevenueBase Database · checked Sep 28, 2026
9Partial evidenceChesterfield, MO, United StatesHQ checked Sep 28, 20265,001-10,0002,061 contacts →

Partial evidence

“Rose International is a leading provider of Staffing and Total Talent Solutions to corporations and government agencies, employing thousands of people across the U.S, Canada and…”

Source: RevenueBase Database · checked Sep 28, 2026
10Indirect evidenceAlexandria, VA, United StatesHQ checked Sep 28, 20261,001-5,0001,920 contacts →

Indirect evidence

“Modern Technology Solutions, Inc.(MTSI) is a 100% employee-owned engineering services and technology solutions company delivering first-choice capabilities to solve problems of…”

Source: RevenueBase Database · checked Sep 28, 2026
11Partial evidenceMclean, VA, United StatesHQ checked Sep 28, 20261,001-5,0001,899 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
12Strong evidenceAnchorage, AK, United StatesHQ checked Sep 28, 20265,001-10,0001,853 contacts →

Strong evidence

“As the most successful Alaska Native village corporation, Chenega figures prominently in the diverse government services contracting marketplace supporting defense, intelligence…”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceOrlando, FL, United StatesHQ checked Sep 28, 20261,001-5,0001,759 contacts →

Indirect evidence

“Loyal Source is an Orlando-based workforce solutions provider dedicated to delivering elite services worldwide.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidencePlymouth, MI, United StatesHQ checked Sep 28, 20261,001-5,0001,545 contacts →

Indirect evidence

“Infotree Global was founded in 2002 in a small office in Canton, MI, Infotree Global had a clear mission; To bring the world’s best talent together with the greatest companies…”

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceAndover, MA, United StatesHQ checked Sep 28, 2026201-5001,480 contacts →

Indirect evidence

“ALKU® is a highly specialized consulting services firm focused on deploying highly skilled consulting resources in the areas of Technologies, HCIT, Life Sciences, and Government…”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceIndianapolis, IN, United StatesHQ checked Sep 28, 20261,001-5,0001,480 contacts →

Indirect evidence

“At Brooksource, relationships are at the center of everything we do.”

Source: RevenueBase Database · checked Sep 28, 2026
17Indirect evidenceCape Canaveral, FL, United StatesHQ checked Sep 28, 20261,001-5,0001,408 contacts →

Indirect evidence

“At Intrepid Global Solutions, we lead the way in mission-critical support where others can’t.”

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidencePittsburgh, PA, United StatesHQ checked Sep 28, 20265,001-10,0001,386 contacts →

Partial evidence

“System One is a leading provider of specialized, highly technical outsourced services, workforce solutions, staffing, and recruiting to critical infrastructure, technology, life…”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceCranbury, NJ, United StatesHQ checked Sep 28, 2026n/a1,347 contacts →

Indirect evidence

“Since V Group Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
20Partial evidenceTroy, MI, United StatesHQ checked Sep 28, 20261,001-5,0001,289 contacts →

Partial evidence

“ICONMA: Your Partner in Global Staffing Solutions and Digital Transformation ICONMA is a globally recognized, Woman-Owned staff augmentation and technology consulting firm.”

Source: RevenueBase Database · checked Sep 28, 2026
21Partial evidenceGreenville, United StatesHQ checked Sep 28, 2026201-5001,187 contacts →

Partial evidence

“TRS Staffing Solutions is a world leading engineering recruitment agency specialising in the recruitment and supply of professional, engineering, technical and field talent.”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceAlexandria, VA, United StatesHQ checked Sep 28, 20261,001-5,0001,168 contacts →

Indirect evidence

“VTG delivers force modernization and digital transformation solutions that expand America’s competitive advantage in the modern battlespace.”

Source: RevenueBase Database · checked Sep 28, 2026
23Strong evidenceBoston, MA, United StatesHQ checked Sep 28, 2026501-1,0001,150 contacts →

Strong evidence

“Motion Recruitment, a Kelly® Company, delivers IT Talent Solutions for Contract, Direct Hire, Managed Solutions and Statement of Work to all of North America from our 21 delivery…”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceDallas, TX, United StatesHQ checked Sep 28, 20265,001-10,0001,141 contacts →

Indirect evidence

“Pinnacle Group is a leading provider of information technology and workforce solutions.”

Source: RevenueBase Database · checked Sep 28, 2026
25Indirect evidenceHuntsville, AL, United StatesHQ checked Sep 28, 20261,001-5,0001,049 contacts →

Indirect evidence

“Radiance Technologies, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 5,450 defense contractor IT staffing companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 38,343 reachable decision-makers.

Free signup · no credit card

View the full list →

Defense contractor IT staffing companies based in the United States at a glance

As of Sep 28, 2026
12.3%Verified-email coverage
57.3Average contacts per company
11-50Median size (employees)
2.4%Largest-city concentration · New York
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
1,617
11-50
1,936
51-200
1,341
201-500
348
501-1,000
111
1,001-5,000
65
5,001-10,000
12
10001+
15

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 5,450 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 defense contractor IT staffing companies, 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 the United States whose own description of what they do matches “defense contractor IT staffing companies”. 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 defense contractor IT staffing companies), 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 defense contractor IT staffing companies, and records with no verified work email. Companies headquartered outside United States 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, 38,343 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.

Defense contractor IT staffing companies by metro

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 defense contractor IT staffing companies, 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 defense contractor IT staffing companies are there based in the United States?

RevenueBase identified 5,450 defense contractor IT staffing companies headquartered in the 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?

Northrop Grumman, headquartered in Falls Church, tops this list with the largest team on record.

Which city has the most defense contractor IT staffing companies?

New York leads with 132 headquartered companies, followed by Houston (116) and Dallas (108).

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 38,343 verified decision-maker contacts tracked across these 5,450 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.

Ready to reach these companies? Verified emails and direct dials for all 5,450 defense contractor IT staffing companies based in the United States. Start with a free account, no credit card.

Download this list →

Related 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 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.