Company lists · Data refreshed September 2026

Top 25 Cleared security staffing agencies based in the United States

RevenueBase identified 848 cleared security staffing agencies headquartered in the United States as of September 2026 and tracks 32,075 professional contacts across them, including 3,035 with verified work emails. New York is the largest hub.

This list covers cleared security staffing agencies 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 27, 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 27, 2026 86% judged on-target in blind review
848Companies
32,075Contacts tracked
3,035Verified emails
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The 25 largest cleared security staffing agencies based in the United States

Ranked by team size
Top 25 of 848 cleared security staffing agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to cleared security 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect 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
2Indirect evidenceSt. Louis, MO, United StatesHQ checked Sep 27, 20265,001-10,0001,781 contacts →

Indirect evidence

“Whelan’s commitment to quality and service has made us one of the foremost respected, successful and fastest growing companies in the industry.”

Source: RevenueBase Database · checked Sep 27, 2026
3Partial evidenceNew York, NY, United StatesHQ checked Sep 27, 202610001+1,375 contacts →

Partial evidence

“Guardsmark, LLC provides security services.”

Source: RevenueBase Database · checked Sep 27, 2026
4Partial evidenceBurbank, CA, United StatesHQ checked Sep 27, 202610001+1,081 contacts →

Partial evidence

“Twenty-five years ago Andrews International (AI) began forming a network of the world’s foremost security authorities and connecting with strategic partners for operations…”

Source: RevenueBase Database · checked Sep 27, 2026
5Indirect evidencePittsburgh, PA, United StatesHQ checked Sep 27, 20265,001-10,0001,062 contacts →

Indirect evidence

“Founded in 1982, St.”

Source: RevenueBase Database · checked Sep 27, 2026
6Indirect evidenceJacksonville, FL, United StatesHQ checked Sep 27, 20265,001-10,000932 contacts →

Indirect evidence

“As an established mid-market company, clients throughout the country entrust us as the best-qualified firm to protect their highest-value assets – while delivering the quality…”

Source: RevenueBase Database · checked Sep 27, 2026
7Indirect evidenceAtlanta, GA, United StatesHQ checked Sep 27, 20265,001-10,000782 contacts →

Indirect evidence

“Now part of Allied Universal.”

Source: RevenueBase Database · checked Sep 27, 2026
8Indirect evidenceEspanola, NM, United StatesHQ checked Sep 27, 202610001+741 contacts →

Indirect evidence

“Known for our responsiveness, innovation, and customer-focused service, Akal provides officers and specialized training to a broad range of clients.”

Source: RevenueBase Database · checked Sep 27, 2026
9Partial evidenceHerndon, VA, United StatesHQ checked Sep 27, 20261,001-5,000677 contacts →

Partial 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
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
11Indirect evidenceRichardson, TX, United StatesHQ checked Sep 27, 20261,001-5,000514 contacts →

Indirect evidence

“COMMITTED PEOPLE.”

Source: RevenueBase Database · checked Sep 27, 2026
12Strong evidenceCentennial, CO, United StatesHQ checked Sep 27, 202651-200433 contacts →

Strong 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
13Indirect evidenceSan Diego, CA, United StatesHQ checked Sep 27, 20265,001-10,000376 contacts →

Indirect evidence

“Elite staffs events and facilities with professionals who create a safe and secure environment.”

Source: RevenueBase Database · checked Sep 27, 2026
14Partial evidenceHunt Valley, MD, United StatesHQ checked Sep 27, 2026201-500338 contacts →

Partial 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
15Partial 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
16Partial evidenceWashington, DC, United StatesHQ checked Sep 27, 2026n/a327 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 27, 2026
17Indirect 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
18Strong evidenceToledo, OH, United StatesHQ checked Sep 27, 20261,001-5,000283 contacts →

Strong evidence

“We're more than a staffing company.We're more than a security company.We're more than a temporary agency.We are your Custom Employment Solution!”

Source: RevenueBase Database · checked Sep 27, 2026
19Partial evidenceRockville Centre, NY, United StatesHQ checked Sep 27, 20261,001-5,000275 contacts →

Partial evidence

“Welcome to Doyle Security Services (DSS) where a team of responsive security professionals stands ready to meet your needs in this ever-changing business environment.”

Source: RevenueBase Database · checked Sep 27, 2026
20Partial evidenceSterling, VA, United StatesHQ checked Sep 27, 2026201-500254 contacts →

Partial 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 27, 2026
21Partial evidenceAlbuquerque, NM, United StatesHQ checked Sep 27, 2026501-1,000252 contacts →

Partial evidence

“ADC supports government and corporate clients with two primary services - personnel security, ranging from pre-employment checks to comprehensive background investigations and…”

Source: RevenueBase Database · checked Sep 27, 2026
22Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 27, 2026201-500238 contacts →

Partial evidence

“Since 1946, GSSC (General Security Services Corporation) has stood as a pillar of trust and professionalism in the Minnesota and Midwest security landscape.”

Source: RevenueBase Database · checked Sep 27, 2026
23Partial evidenceSan Antonio, TX, United StatesHQ checked Sep 27, 20265,001-10,000231 contacts →

Partial evidence

“Full Service Security and Investigative company serving the government sector.”

Source: RevenueBase Database · checked Sep 27, 2026
24Indirect evidenceRockledge, FL, United StatesHQ checked Sep 27, 20261,001-5,000207 contacts →

Indirect evidence

“Luke & Associates (Luke) is a trusted provider of healthcare and professional services.”

Source: RevenueBase Database · checked Sep 27, 2026
25Indirect evidenceDes Plaines, IL, United StatesHQ checked Sep 27, 20261,001-5,000203 contacts →

Indirect evidence

“As the U.S.”

Source: RevenueBase Database · checked Sep 27, 2026

Showing 25 of 848 cleared security staffing agencies based in the United States

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Cleared security staffing agencies based in the United States at a glance

As of Sep 27, 2026
9.5%Verified-email coverage
37.8Average contacts per company
11-50Median size (employees)
2.8%Largest-city concentration · New York
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
242
11-50
283
51-200
171
201-500
82
501-1,000
29
1,001-5,000
23
5,001-10,000
12
10001+
4

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 848 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 cleared security 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.
What qualifies
Companies headquartered in the United States whose own description of what they do matches “cleared security 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 cleared security 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 cleared security staffing agencies, 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, 3,035 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.

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 cleared security 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 cleared security staffing agencies are there based in the United States?

RevenueBase identified 848 cleared security staffing agencies 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?

Chenega Corporation, headquartered in Anchorage, tops this list with the largest team on record.

Which city has the most cleared security staffing agencies?

New York leads with 24 headquartered companies, followed by Washington (20) and Houston (16).

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 3,035 verified decision-maker contacts tracked across these 848 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.