Company lists · Data refreshed September 2026

Top 25 Clearance IT staffing agencies worldwide

Name: Clearance IT staffing agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 5,969 companies tracked

RevenueBase identified 5,969 clearance IT staffing agencies worldwide as of September 2026 and tracks 141,336 professional contacts across them, including 22,694 with verified work emails. The United States is the largest market and New York the largest hub.

This list covers clearance IT staffing agencies worldwide, 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 27, 2026. Country and city lists for clearance IT staffing agencies follow the table.

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 27, 2026 86% judged on-target in blind review

5,969Companies

141,336Contacts tracked

22,694Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest clearance IT staffing agencies worldwide

Ranked by team size

Top 25 of 5,969 clearance IT staffing agencies worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to clearance IT staffing agencies: 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	Peraton	Indirect evidence	Reston, VA, United StatesHQ checked Sep 27, 2026	10001+	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 27, 2026
2	Mantech	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 27, 2026	5,001-10,000	9,697 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 27, 2026
3	Airswift	Indirect evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	501-1,000	2,128 contacts →
	Indirect evidence “We support STEM professionals looking for jobs with exceptional firms in the technology and engineering sectors.” Source: RevenueBase Database · checked Sep 27, 2026
4	Chenega Corporation	Indirect evidence	Anchorage, AK, United StatesHQ checked Sep 27, 2026	5,001-10,000	1,853 contacts →
	Indirect 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 27, 2026
5	Loyal Source Government Services	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 27, 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 27, 2026
6	Magna Infotech	Partial evidence	Bangalore, IndiaHQ checked Sep 27, 2026	10001+	1,702 contacts →
	Partial evidence “We are the largest IT staff augmentation provider in India, with employees spread across 500+ skill sets.” Source: RevenueBase Database · checked Sep 27, 2026
7	Infotree Global Solutions	Indirect evidence	Plymouth, MI, United StatesHQ checked Sep 27, 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 27, 2026
8	ALKU	Indirect evidence	Andover, MA, United StatesHQ checked Sep 27, 2026	201-500	1,480 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 27, 2026
9	Brooksource	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 27, 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 27, 2026
10	System ONE	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 27, 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 27, 2026
11	Quess IT Staffing	Strong evidence	Bangalore, IndiaHQ checked Sep 27, 2026	10001+	1,232 contacts →
	Strong evidence “Quess IT Staffing is India’s largest IT staffing company with over 20 years of experience in placing IT professionals across 300+ companies, covering a wide range of levels and…” Source: RevenueBase Database · checked Sep 27, 2026
12	TRS Staffing Solutions	Partial evidence	Greenville, United StatesHQ checked Sep 27, 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 27, 2026
13	Motion Recruitment	Partial evidence	Boston, MA, United StatesHQ checked Sep 27, 2026	501-1,000	1,150 contacts →
	Partial 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 27, 2026
14	The MIL Corporation	Indirect evidence	Bowie, MD, United StatesHQ checked Sep 27, 2026	501-1,000	941 contacts →
	Indirect evidence “Established in 1980, MIL provides innovative cyber, engineering, financial, and information technology services to the federal government.” Source: RevenueBase Database · checked Sep 27, 2026
15	Imcs Group	Strong evidence	Irving, TX, United StatesHQ checked Sep 27, 2026	201-500	881 contacts →
	Strong evidence “IMCS Group is an IT, Healthcare, and Professional Staffing Company that helps Enterprises optimize the business value of their Staffing investments and enables them to achieve…” Source: RevenueBase Database · checked Sep 27, 2026
16	Signature Consultants	Indirect evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 27, 2026	1,001-5,000	783 contacts →
	Indirect evidence “We’re stronger together.” Source: RevenueBase Database · checked Sep 27, 2026
17	Integrated Resources, INC IRI	Partial evidence	Edison, NJ, United StatesHQ checked Sep 27, 2026	501-1,000	762 contacts →
	Partial evidence “Integrated Resources Inc.(IRI) is a professional staffing firm specializing in contract, consulting & full time positions in the area of Information Technology, Life Science and…” Source: RevenueBase Database · checked Sep 27, 2026
18	JSG Johnson Service Group, INC	Partial evidence	Westmont, IL, United StatesHQ checked Sep 27, 2026	5,001-10,000	757 contacts →
	Partial evidence “Johnson Service Group, Inc.(JSG) is a leader in the staffing and consulting services industry, with 40 years of experience investing in people and companies.” Source: RevenueBase Database · checked Sep 27, 2026
19	Cynet Systems	Indirect evidence	Sterling, VA, United StatesHQ checked Sep 27, 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 27, 2026
20	Zenith Infotech	Indirect evidence	City Hall, SingaporeHQ checked Sep 27, 2026	201-500	695 contacts →
	Indirect evidence “Zenith Infotech (S) Pte Ltd.” Source: RevenueBase Database · checked Sep 27, 2026
21	Consultadd INC	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	685 contacts →
	Strong evidence “Consultadd is a leading IT staffing and workforce solutions partner, helping U.S.” Source: RevenueBase Database · checked Sep 27, 2026
22	Poolia Sverige	Indirect evidence	Stockholm, SwedenHQ checked Sep 27, 2026	1,001-5,000	615 contacts →
	Indirect evidence “Att hitta rätt person till rätt plats – det är vår kärnkompetens.” Source: RevenueBase Database · checked Sep 27, 2026
23	Applied Research Solutions	Indirect evidence	Beavercreek, OH, United StatesHQ checked Sep 27, 2026	501-1,000	597 contacts →
	Indirect evidence “Started in 2012, ARS is a growing business serving the Department of Defense and Intelligence Community.” Source: RevenueBase Database · checked Sep 27, 2026
24	Codeforce 360	Strong evidence	Alpharetta, GA, United StatesHQ checked Sep 27, 2026	501-1,000	591 contacts →
	Strong evidence “CodeForce 360 is a growing IT staffing company which thrives on a seasoned team of IT experts, a palpable international presence, and the ability to leverage the best of…” Source: RevenueBase Database · checked Sep 27, 2026
25	Volt Technical Resources	Indirect evidence	Orange, CA, United StatesHQ checked Sep 27, 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 27, 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: clearance IT staffing agencies. 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 clearance IT staffing agencies.
Partial evidence: Its own public description names part of clearance IT staffing agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clearance IT staffing agencies. 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 5,969 clearance IT staffing agencies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 22,694 reachable decision-makers.

Free signup · no credit card

View the full list →

Clearance IT staffing agencies worldwide at a glance

As of Sep 27, 2026

16.1%Verified-email coverage

23.7Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · New York

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

2,320

11-50

2,061

51-200

1,126

201-500

277

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 clearance IT staffing agencies, 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.
Coverage: Every country. Country and city lists for clearance IT staffing agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “clearance IT staffing agencies”. 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 clearance IT staffing agencies), 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 clearance IT staffing agencies, and records with no verified work email.
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, 22,694 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 27, 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.

Clearance IT staffing agencies by location

34 lists · largest first

Every Clearance IT staffing agencies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 clearance IT staffing agencies, 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 clearance IT staffing agencies are there worldwide?

RevenueBase identified 5,969 clearance IT staffing agencies worldwide 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?

Peraton, headquartered in Reston, tops this list with the largest team on record.

Which country has the most clearance IT staffing agencies?

The United States leads with 3,463 companies, followed by India (428) and Canada (202). Every clearance IT staffing agencies list by country and city is linked on this page.

Which city has the most clearance IT staffing agencies?

New York leads with 113 headquartered companies, followed by Hyderabad (95) and Houston (79).

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 22,694 verified decision-maker contacts tracked across these 5,969 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 27, 2026.

Ready to reach these companies? Verified emails and direct dials for all 5,969 clearance IT staffing agencies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.