Company lists · Data refreshed September 2026

Top 25 Healthcare security companies based in the United States

Name: Healthcare security 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 3, 2026 1,189 companies tracked

RevenueBase identified 1,189 healthcare security companies headquartered in the United States as of September 2026 and tracks 96,123 professional contacts across them, including 11,561 with verified work emails and 29,307 with mobile numbers. Los Angeles is the largest hub.

This list covers healthcare security 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 3, 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 RevenueBase Smart Search rating on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

1,189Companies

96,123Contacts tracked

11,561Verified emails

29,307Mobile numbers

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The 25 largest healthcare security companies based in the United States

Ranked by team size

Top 25 of 1,189 healthcare security companies based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to healthcare security 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	Allied Universal	Partial evidence	Irvine, IL, United StatesHQ checked Sep 3, 2026	10001+	62,715 contacts →
	Partial evidence “Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…” Source: RevenueBase Database · checked Sep 3, 2026
2	DSI Security Services	Partial evidence	Dothan, AL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,186 contacts →
	Partial evidence “DSI Security Services offers armed and unarmed uniformed security guard services.” Source: RevenueBase Database · checked Sep 3, 2026
3	SOS Security LLC	Partial evidence	Parsippany, CA, United StatesHQ checked Sep 3, 2026	10001+	1,148 contacts →
	Partial evidence “SOS Security is a known innovator and leader in the security and protective services industry.” Source: RevenueBase Database · checked Sep 3, 2026
4	Titan Security Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,133 contacts →
	Partial evidence “At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Source: RevenueBase Database · checked Sep 3, 2026
5	Securitas Critical Infrastructure Services, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 3, 2026	10001+	1,113 contacts →
	Partial evidence “Securitas Critical Infrastructure Services, Inc.(SCIS) is a provider of specialized security and fire services to the highly regulated Nuclear, Aerospace, Defense, Energy, and…” Source: RevenueBase Database · checked Sep 3, 2026
6	St. Moritz Security Services, INC	Indirect evidence	Pittsburgh, TX, United StatesHQ checked Sep 3, 2026	5,001-10,000	1,057 contacts →
	Indirect evidence “Founded in 1982, St.” Source: RevenueBase Database · checked Sep 3, 2026
7	Security 101	Partial evidence	West Palm Beach, NC, United StatesHQ checked Sep 3, 2026	501-1,000	850 contacts →
	Partial evidence “Security 101® is a nationwide leader in designing, installing, and maintaining advanced security systems tailored to the unique needs of organizations of all sizes.” Source: RevenueBase Database · checked Sep 3, 2026
8	Northeast Security INC	Partial evidence	Westwood, MA, United StatesHQ checked Sep 3, 2026	1,001-5,000	744 contacts →
	Partial evidence “Improving Security.” Source: RevenueBase Database · checked Sep 3, 2026
9	American Security & Investigations	Partial evidence	St. Paul, NE, United StatesHQ checked Sep 3, 2026	1,001-5,000	404 contacts →
	Partial evidence “American Security & Investigations has provided security and investigative services throughout the upper midwest since 1959.” Source: RevenueBase Database · checked Sep 3, 2026
10	Elite Security & Staffing	Indirect evidence	San Diego, FL, United StatesHQ checked Sep 3, 2026	5,001-10,000	375 contacts →
	Indirect evidence “Elite staffs events and facilities with professionals who create a safe and secure environment.” Source: RevenueBase Database · checked Sep 3, 2026
11	Cambridge Security Services Corp	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	343 contacts →
	Partial evidence “Cambridge Security Services is a private security company that has been in business for more than 30 years.” Source: RevenueBase Database · checked Sep 3, 2026
12	United American Security, LLC UAS	Partial evidence	Raleigh, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	322 contacts →
	Partial evidence “United American Security was formed in 2010 to bring excellent regional security companies together.” Source: RevenueBase Database · checked Sep 3, 2026
13	Doyle Security Services, Inc. DSS	Partial evidence	Rockville Centre, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	273 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 3, 2026
14	Minuteman Security & Life Safety	Partial evidence	Andover, VA, United StatesHQ checked Sep 3, 2026	501-1,000	249 contacts →
	Partial evidence “Minuteman Security & Life Safety is a leading provider of enterprise security system technology solutions.” Source: RevenueBase Database · checked Sep 3, 2026
15	Central Defense Security, LLC	Partial evidence	Nashville, TN, United States	501-1,000	208 contacts →
	Partial evidence “Central Defense Security officers protect the human, intellectual and physical assets of our customers and their visitors.” Source: RevenueBase Database · checked Sep 3, 2026
16	Acts-Aviation Security	Indirect evidence	Des Plaines, IL, United StatesHQ checked Sep 3, 2026	1,001-5,000	203 contacts →
	Indirect evidence “As the U.S.” Source: RevenueBase Database · checked Sep 3, 2026
17	Strategic Security Corporation	Partial evidence	Smithtown, NY, United StatesHQ checked Sep 3, 2026	1,001-5,000	192 contacts →
	Partial evidence “Strategic Security Corp (SSC) is a nationwide leading provider of integrated security solutions specializing in security guard services, event security, consulting, executive…” Source: RevenueBase Database · checked Sep 3, 2026
18	Titan Protection And Consulting, INC	Partial evidence	Overland Park, MO, United StatesHQ checked Sep 3, 2026	501-1,000	173 contacts →
	Partial evidence “Established in 2008, Titan Protection and Consulting is a leading-edge security firm specializing in crime prevention and detection for hundreds of companies nationwide.” Source: RevenueBase Database · checked Sep 3, 2026
19	Blackstone Security Services, INC	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 3, 2026	501-1,000	155 contacts →
	Partial evidence “Blackstone Security Services is proud to offer a wide variety of security services tailored to satisfy specific client needs.” Source: RevenueBase Database · checked Sep 3, 2026
20	American Security	Partial evidence	Greenville, SC, United StatesHQ checked Sep 3, 2026	1,001-5,000	145 contacts →
	Partial evidence “Privately owned and operated, American Security has grown from an entrepreneurial start-up in 1975 to become one of the largest Southeastern-based security firms with over 3,500…” Source: RevenueBase Database · checked Sep 3, 2026
21	VTI Security	Partial evidence	Burnsville, WI, United StatesHQ checked Sep 3, 2026	1,001-5,000	143 contacts →
	Partial evidence “For almost 40 years, VTI has been called upon and recognized by our industry for a full range of advanced physical security technologies.” Source: RevenueBase Database · checked Sep 3, 2026
22	Phoenix Protective Corp	Partial evidence	Spokane Valley, WA, United StatesHQ checked Sep 3, 2026	501-1,000	141 contacts →
	Partial evidence “Phoenix Protective Corporation delivers proactive security solutions with highly trained, experienced security officers and outstanding customer protection.” Source: RevenueBase Database · checked Sep 3, 2026
23	Lofton Security Service	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 3, 2026	1,001-5,000	135 contacts →
	Partial evidence “Founded in 1979, Lofton Security is the largest locally-owned, independent security and staffing company in the southern region.” Source: RevenueBase Database · checked Sep 3, 2026
24	Nighthawk Security Company	Partial evidence	Owensboro, KY, United StatesHQ checked Sep 3, 2026	501-1,000	129 contacts →
	Partial evidence “Nighthawk Security Company is a privately owned and operated company headquartered in western Kentucky.” Source: RevenueBase Database · checked Sep 3, 2026
25	Security ONE	Partial evidence	Memphis, TN, United StatesHQ checked Sep 3, 2026	501-1,000	126 contacts →
	Partial evidence “Security One, Inc.” Source: RevenueBase Database · checked Sep 3, 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: healthcare security 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 healthcare security companies.
Partial evidence: Its own public description names part of healthcare security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name healthcare security 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 1,189 healthcare security companies based in the United States

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Healthcare security companies based in the United States at a glance

As of Sep 3, 2026

12.0%Verified-email coverage

30.5%Mobile-number coverage

80.8Average contacts per company

11-50Median size (employees)

3.1%Largest-city concentration · Los Angeles

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

367

11-50

457

51-200

208

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

96631–60

6,61261–90

3,78290–180

201180+

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 healthcare security 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 “healthcare security 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 healthcare security 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 healthcare security 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, 11,561 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 3, 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.

Healthcare security companies by metro

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 healthcare security 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 healthcare security companies are there based in the United States?

RevenueBase identified 1,189 healthcare security 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?

Allied Universal, headquartered in Rosemont, tops this list with the largest team on record.

Which city has the most healthcare security companies?

Los Angeles leads with 37 headquartered companies, followed by New York (30) and Miami (23).

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 11,561 verified decision-maker contacts tracked across these 1,189 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 3, 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.