Company lists · Data refreshed September 2026

Top 25 Defense staffing companies based in the United States

Name: Defense staffing companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,148 companies tracked

RevenueBase identified 1,148 defense staffing companies headquartered in the United States as of September 2026 and tracks 41,879 professional contacts across them, including 7,132 with verified work emails. Washington is the largest hub.

This list covers defense 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

1,148Companies

41,879Contacts tracked

7,132Verified emails

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The 25 largest defense staffing companies based in the United States

Ranked by team size

Top 25 of 1,148 defense 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 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	DAY & Zimmermann	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	10001+	3,483 contacts →
	Indirect evidence “When you’ve been around for more than a century, you know a thing or two!” Source: RevenueBase Database · checked Sep 28, 2026
2	Chenega Corporation	Partial evidence	Anchorage, AK, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,853 contacts →
	Partial 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
3	Loyal Source Government Services	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,759 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
4	Infotree Global Solutions	Indirect evidence	Plymouth, MI, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,545 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
5	Brooksource	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,480 contacts →
	Indirect evidence “At Brooksource, relationships are at the center of everything we do.” Source: RevenueBase Database · checked Sep 28, 2026
6	System ONE	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 28, 2026	5,001-10,000	1,386 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
7	TRS Staffing Solutions	Partial evidence	Greenville, United StatesHQ checked Sep 28, 2026	201-500	1,187 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
8	Cynet Systems	Indirect evidence	Sterling, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	732 contacts →
	Indirect evidence “Headquartered in Washington DC Metro Area, Cynet Systems is a top talent supplier for companies across North America.” Source: RevenueBase Database · checked Sep 28, 2026
9	Volt Technical Resources	Indirect evidence	Orange, CA, United StatesHQ checked Sep 28, 2026	5,001-10,000	584 contacts →
	Indirect evidence “A Six Sigma Company ~61 years in the industry ~Nationwide 4 million+ candidate database ~Fortune Company ~Extensive E-Recruiting capabilities ~Reference and Employment check…” Source: RevenueBase Database · checked Sep 28, 2026
10	Confident Staffing INC	Partial evidence	Medford, OR, United StatesHQ checked Sep 28, 2026	201-500	555 contacts →
	Partial evidence “We provide staffing services in Oregon and Washington and Direct Hire services nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
11	STS Technical Services	Strong evidence	Brookfield, WI, United StatesHQ checked Sep 28, 2026	51-200	543 contacts →
	Strong evidence “STS Technical Services is a Top 100 Staffing Firm that’s partnered with some of the largest names in the aerospace, manufacturing, defense and industrial industries.” Source: RevenueBase Database · checked Sep 28, 2026
12	Tech USA	Partial evidence	Millersville, MD, United StatesHQ checked Sep 28, 2026	501-1,000	541 contacts →
	Partial evidence “A premier provider of staffing solutions, Tech USA is in the top 1% of the Recruiting Industry.” Source: RevenueBase Database · checked Sep 28, 2026
13	EASI	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 28, 2026	1,001-5,000	526 contacts →
	Indirect evidence “EASi is now Actalent.” Source: RevenueBase Database · checked Sep 28, 2026
14	Entegee	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 28, 2026	201-500	468 contacts →
	Indirect evidence “For the last sixty years Entegee has provided Fortune 500 and other companies with highly qualified engineering and technical personnel.” Source: RevenueBase Database · checked Sep 28, 2026
15	Sigmatech	Indirect evidence	Huntsville, AL, United StatesHQ checked Sep 28, 2026	501-1,000	458 contacts →
	Indirect evidence “Sigmatech provides industry-leading engineering, technical, programmatic, test and evaluation, and training support for the Army, Space Force, Air Force, Navy, and MDA.” Source: RevenueBase Database · checked Sep 28, 2026
16	Bartech Staffing	Indirect evidence	Southfield, MI, United StatesHQ checked Sep 28, 2026	1,001-5,000	447 contacts →
	Indirect evidence “Trusted for Talent.” Source: RevenueBase Database · checked Sep 28, 2026
17	Softworld, A Kelly Company	Partial evidence	Waltham, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	389 contacts →
	Partial evidence “Softworld has developed expertise across five distinct staffing and consulting practices over the past 25 years.” Source: RevenueBase Database · checked Sep 28, 2026
18	Midwest Consulting Group	Partial evidence	Overland Park, KS, United StatesHQ checked Sep 28, 2026	51-200	388 contacts →
	Partial evidence “Simply put, MCG is a full service IT staffing firm…locally owned and operated with offices in Overland Park, KS and Dallas, TX.” Source: RevenueBase Database · checked Sep 28, 2026
19	CTR Group	Partial evidence	Newport News, VA, United StatesHQ checked Sep 28, 2026	201-500	337 contacts →
	Partial evidence “CTR Group provides staffing and recruiting services across the United States.” Source: RevenueBase Database · checked Sep 28, 2026
20	The Midtown Group	Partial evidence	Washington, DC, United StatesHQ checked Sep 28, 2026	n/a	327 contacts →
	Partial evidence “Founded in 1989, The Midtown Group pioneers 360-degree staffing services and solutions for organizations across both public and private sectors.” Source: RevenueBase Database · checked Sep 28, 2026
21	Talascend	Indirect evidence	Troy, MI, United StatesHQ checked Sep 28, 2026	501-1,000	288 contacts →
	Indirect evidence “At Talascend, opportunity isn’t just a word, it’s what drives everything we do.” Source: RevenueBase Database · checked Sep 28, 2026
22	Crystal Equation Corporation	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	262 contacts →
	Indirect evidence “Crystal Equation (CE) is a certified Women-Owned Business that empowers people and advances technology initiatives by building trust.” Source: RevenueBase Database · checked Sep 28, 2026
23	Abbtech	Strong evidence	Sterling, VA, United StatesHQ checked Sep 28, 2026	201-500	254 contacts →
	Strong evidence “From defense to civilian agencies, we provide staffing solutions that meet the demands of federal, local and state agencies.” Source: RevenueBase Database · checked Sep 28, 2026
24	PDS	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 28, 2026	201-500	253 contacts →
	Indirect evidence “PDS is one of the leading Aerospace, Information Technology (IT) & Engineering consulting firms in the Western United States.” Source: RevenueBase Database · checked Sep 28, 2026
25	Kavaliro	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 28, 2026	501-1,000	250 contacts →
	Indirect evidence “Founded in 2010, Kavaliro has grown to become a leader in technical, professional, and workforce solutions.” 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: defense staffing companies. 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 defense staffing companies.
Partial evidence: Its own public description names part of defense staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name defense staffing companies. 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 1,148 defense staffing companies based in the United States

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Defense staffing companies based in the United States at a glance

As of Sep 28, 2026

17.0%Verified-email coverage

36.5Average contacts per company

11-50Median size (employees)

2.2%Largest-city concentration · Washington

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

415

11-50

372

51-200

212

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,148 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 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 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 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 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, 7,132 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 staffing companies by metro

Defense staffing companies in Washington25

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 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 staffing companies are there based in the United States?

RevenueBase identified 1,148 defense 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?

DAY & Zimmermann, headquartered in Philadelphia, tops this list with the largest team on record.

Which city has the most defense staffing companies?

Washington leads with 25 headquartered companies, followed by Houston (24) and Atlanta (22).

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 7,132 verified decision-maker contacts tracked across these 1,148 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.