Company lists · Data refreshed November 2026

Top 25 Uniformed security services based in the United States

RevenueBase identified 2,551 company matches for uniformed security services associated with the United States as of November 2026 and tracks 127,236 professional contacts across them, including 9,533 with verified work emails. Los Angeles is the largest hub.

This list covers company matches for uniformed security services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built
2,551Companies
127,236Contacts tracked
9,533Verified emails
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The 25 largest uniformed security services based in the United States

Ranked by team size
Top 25 of 2,551 company matches for uniformed security services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchParsippany, MI, United StatesHQ recorded Nov 5, 202610001+40,551 contacts →

Exact match

“Securitas knows Security.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchNorthridge, CA, United StatesHQ recorded Nov 5, 202610001+4,090 contacts →

Exact match

“Contemporary Services Corporation (CSC) is recognized worldwide as the pioneer, expert and only employee owned company in the crowd management field.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchSt. Petersburg, FL, United StatesHQ recorded Nov 5, 2026n/a4,040 contacts →

Exact match

“Excelsior Defense is a security and investigations company based out of St.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchPasadena, CA, United StatesHQ recorded Nov 5, 202610001+3,921 contacts →

Exact match

“Everywhere Security Matters™ Inter-Con is one of the largest and fastest-growing physical security and risk management companies in the world.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchAurora, IL, United StatesHQ recorded Nov 5, 20265,001-10,0002,393 contacts →

Exact match

“Andy Frain Services.America's leading provider of integrated solutions to security and events needs for over 90 years.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchChattanooga, VA, United StatesHQ recorded Nov 5, 20265,001-10,0002,341 contacts →

Exact match

“Walden Security is the nation's largest privately held, family-owned and operated, American-owned security company.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchSt. Louis, KY, United StatesHQ recorded Nov 5, 20265,001-10,0001,872 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchRaleigh, TX, United StatesHQ recorded Nov 5, 20265,001-10,0001,740 contacts →

Exact match

“Sunstates Security, LLC is one of the industry's leading providers of contract security services with a differentiated approach to providing successful, cost-effective, quality…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Nov 5, 202610001+1,562 contacts →

Exact match

“Guardsmark, LLC provides security services.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchBethesda, United StatesHQ recorded Nov 5, 20265,001-10,0001,547 contacts →

Exact match

“Admiral Security Services provides professional armed and unarmed uniformed security officers, unparalleled site management and unwavering corporate support that exceeds client…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchNew Orleans, LA, United StatesHQ recorded Nov 5, 20261,001-5,0001,540 contacts →

Exact match

“Weiser Security Services is the 11th largest security service provider in the U.S.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchDothan, AL, United StatesHQ recorded Nov 5, 20261,001-5,0001,277 contacts →

Exact match

“DSI Security Services offers armed and unarmed uniformed security guard services.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchChicago, IL, United StatesHQ recorded Nov 5, 20261,001-5,0001,209 contacts →

Exact match

“At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchParsippany, VA, United StatesHQ recorded Nov 5, 202610001+1,203 contacts →

Exact match

“SOS Security is a known innovator and leader in the security and protective services industry.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchPittsburgh, PA, United StatesHQ recorded Nov 5, 20265,001-10,0001,168 contacts →

Exact match

“Founded in 1982, St.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchJacksonville, FL, United StatesHQ recorded Nov 5, 20265,001-10,0001,052 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchSmithtown, PA, United StatesHQ recorded Nov 5, 20265,001-10,000930 contacts →

Exact match

“Arrow Security stands as one of the nation's largest privately held security guard companies.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchAtlanta, GA, United StatesHQ recorded Nov 5, 20265,001-10,000835 contacts →

Exact match

“Now part of Allied Universal.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchConcord, CA, United StatesHQ recorded Nov 5, 20261,001-5,000830 contacts →

Exact match

“Bay Alarm is a family-owned national security company in operation since 1946.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchEspanola, NM, United StatesHQ recorded Nov 5, 202610001+798 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchSt. Petersburg, CA, United StatesHQ recorded Nov 5, 202610001+725 contacts →

Exact match

“PalAmerican Security is an industry-leading security provider, delivering customized programs across 44 states and employees.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchDallas, OK, United StatesHQ recorded Nov 5, 20261,001-5,000720 contacts →

Exact match

“UNITED PROTECTIVE SERVICES "Our Edge Is Your Security" United Protective Services is a Southwest based provider of security services unique from traditional security companies.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchLos Angeles, CA, United StatesHQ recorded Nov 5, 20261,001-5,000697 contacts →

Exact match

“Professional Security Consultants, Inc.(PSC) is a world-class provider of security guard services, patrol, investigations, backgrounds, consulting, security screening & specialty…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchGrand Rapids, MI, United StatesHQ recorded Nov 5, 20261,001-5,000592 contacts →

Exact match

“DK Security is unique in that it offers a single company for a wide ranging availability of security and investigative services.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25Exact matchRichardson, NC, United StatesHQ recorded Nov 5, 20261,001-5,000544 contacts →

Exact match

“COMMITTED PEOPLE.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 2,551 uniformed security services based in the United States

See the full list, filter by size, metro and specialty, and access 9,533 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Uniformed security services based in the United States at a glance

As of Nov 5, 2026
7.5%Verified-email coverage
49.9Average contacts per company
11-50Median size (employees)
3.8%Largest-city concentration · Los Angeles
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
639
11-50
843
51-200
647
201-500
219
501-1,000
94
1,001-5,000
58
5,001-10,000
18
10001+
18

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 2,551 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “uniformed security services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 9,533 professional contacts with verified work emails across the full matched dataset. 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 November 5, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “uniformed security services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many uniformed security services are there based in the United States?

RevenueBase identified 2,551 company matches for uniformed security services associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Securitas Security Services Usa, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most uniformed security services?

Los Angeles leads with 97 company records, followed by New York (85) and Houston (70).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 9,533 professional contacts with verified work emails tracked across these 2,551 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 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 SmartSearch, 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.