Company lists · Data refreshed September 2026

Top 25 Clearance recruiting agencies worldwide

RevenueBase identified 3,234 clearance recruiting agencies worldwide as of September 2026 and tracks 73,489 professional contacts across them, including 11,223 with verified work emails. The United States is the largest market and London the largest hub.

This list covers clearance recruiting 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 recruiting 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
3,234Companies
73,489Contacts tracked
11,223Verified emails
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The 25 largest clearance recruiting agencies worldwide

Ranked by team size
Top 25 of 3,234 clearance recruiting 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 recruiting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceReston, VA, United StatesHQ checked Sep 27, 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 27, 2026
2Indirect evidenceHerndon, VA, United StatesHQ checked Sep 27, 20265,001-10,0009,697 contacts →

Indirect evidence

“MANTECH is more than a technology company.”

Source: RevenueBase Database · checked Sep 27, 2026
3Partial evidenceAtlanta, GA, United StatesHQ checked Sep 27, 202610001+1,948 contacts →

Partial evidence

“Remedy Intelligent Staffing is a nationwide professional staffing organization with more than 50 years of recruiting and selection expertise to match job candidates with positions…”

Source: RevenueBase Database · checked Sep 27, 2026
4Indirect evidenceAnchorage, AK, United StatesHQ checked Sep 27, 20265,001-10,0001,853 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
5Partial evidencePittsburgh, PA, United StatesHQ checked Sep 27, 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 27, 2026
6Indirect evidenceSterling, VA, United StatesHQ checked Sep 27, 20261,001-5,000732 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
7Indirect evidenceHerndon, VA, United StatesHQ checked Sep 27, 20261,001-5,000677 contacts →

Indirect evidence

“OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…”

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceBeavercreek, OH, United StatesHQ checked Sep 27, 2026501-1,000597 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
9Indirect evidenceBrookfield, WI, United StatesHQ checked Sep 27, 202651-200543 contacts →

Indirect 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 27, 2026
10Partial evidenceMillersville, MD, United StatesHQ checked Sep 27, 2026501-1,000541 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 27, 2026
11Partial evidenceCentennial, CO, United StatesHQ checked Sep 27, 202651-200433 contacts →

Partial evidence

“ClearanceJobs.com the largest security-cleared career network, specializes in defense jobs for professionals with security clearances.”

Source: RevenueBase Database · checked Sep 27, 2026
12Indirect evidenceFrederick, MD, United StatesHQ checked Sep 27, 2026501-1,000410 contacts →

Indirect evidence

“Edgewater Federal Solutions was founded in 2002 with the mission of being the best IT consulting company possible for our government clients, our contracting partners and our…”

Source: RevenueBase Database · checked Sep 27, 2026
13Indirect evidenceWestchester, IL, United StatesHQ checked Sep 27, 202651-200410 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026
14Indirect evidenceWaltham, MA, United StatesHQ checked Sep 27, 20261,001-5,000389 contacts →

Indirect evidence

“Softworld has developed expertise across five distinct staffing and consulting practices over the past 25 years.”

Source: RevenueBase Database · checked Sep 27, 2026
15Indirect evidenceOverland Park, KS, United StatesHQ checked Sep 27, 202651-200388 contacts →

Indirect 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 27, 2026
16Indirect evidenceDayton, OH, United StatesHQ checked Sep 27, 20261,001-5,000381 contacts →

Indirect evidence

“For 39 years, MacAulay-Brown, Inc.(MacB), an Alion Company, has been solving many of the Nation’s most complex National Security challenges.”

Source: RevenueBase Database · checked Sep 27, 2026
17Indirect evidenceSunrise, FL, United StatesHQ checked Sep 27, 2026201-500372 contacts →

Indirect evidence

“Since 1983, StevenDouglas has established itself as a recognized leader in providing access to top talent, driven by highly tenured and experienced professionals committed to…”

Source: RevenueBase Database · checked Sep 27, 2026
18Indirect evidenceLondon, United KingdomHQ checked Sep 27, 2026201-500369 contacts →

Indirect evidence

“Vivid Resourcing, a leading international talent solutions partner, connects you with in-demand technical professionals you need to flourish in the Tech, Engineering, Life…”

Source: RevenueBase Database · checked Sep 27, 2026
19Indirect evidenceHunt Valley, MD, United StatesHQ checked Sep 27, 2026201-500338 contacts →

Indirect evidence

“For over 50 years, Master Security has provided outstanding security services for state and federal government agencies and private enterprises.”

Source: RevenueBase Database · checked Sep 27, 2026
20Partial evidenceNewport News, VA, United StatesHQ checked Sep 27, 2026201-500337 contacts →

Partial evidence

“CTR Group provides staffing and recruiting services across the United States.”

Source: RevenueBase Database · checked Sep 27, 2026
21Indirect evidenceWashington, DC, United StatesHQ checked Sep 27, 2026n/a327 contacts →

Indirect 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 27, 2026
22Indirect evidenceFairborn, OH, United StatesHQ checked Sep 27, 2026201-500326 contacts →

Indirect evidence

“Peerless Technologies Corporation is a nationally recognized, award-winning, and reputable business serving federal government clients at more than 25 locations nationwide.”

Source: RevenueBase Database · checked Sep 27, 2026
23Partial evidenceNew York, NY, United StatesHQ checked Sep 27, 2026201-500319 contacts →

Partial evidence

“For over 50 years, TBG has stood as a leader in the staffing and recruiting industry.”

Source: RevenueBase Database · checked Sep 27, 2026
24Indirect evidenceMelbourne, AustraliaHQ checked Sep 27, 2026n/a316 contacts →

Indirect evidence

“Public Sector People (PSP) as part of Search4, is a leading Australian recruitment agency specialising in delivering permanent and temporary solutions across the Public Sector…”

Source: RevenueBase Database · checked Sep 27, 2026
25Indirect evidenceKaty, TX, United StatesHQ checked Sep 27, 20261,001-5,000313 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 3,234 clearance recruiting agencies worldwide

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Clearance recruiting agencies worldwide at a glance

As of Sep 27, 2026
15.3%Verified-email coverage
22.7Average contacts per company
1-10Median size (employees)
2.0%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
1,714
11-50
870
51-200
415
201-500
120
501-1,000
53
1,001-5,000
35
5,001-10,000
9
10001+
13

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 recruiting 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 recruiting agencies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “clearance recruiting 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 recruiting 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 recruiting 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, 11,223 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 recruiting agencies by location

13 lists · largest first

Every Clearance recruiting 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 recruiting 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 recruiting agencies are there worldwide?

RevenueBase identified 3,234 clearance recruiting 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 recruiting agencies?

The United States leads with 1,726 companies, followed by the United Kingdom (212) and India (158). Every clearance recruiting agencies list by country and city is linked on this page.

Which city has the most clearance recruiting agencies?

London leads with 66 headquartered companies, followed by New York (54) and Washington (48).

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 11,223 verified decision-maker contacts tracked across these 3,234 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.

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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.