Company lists · Data refreshed September 2026

Top 25 Healthcare security companies based in the United States

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, how directly it supports the match, 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 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 Match evidence 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
Unlock all 1,189 companies Free signup · no credit card · 500 free credits

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. Evidence rates how directly each company's own description names healthcare security companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
Allied UniversalPartial evidence
Irvine, IL, United StatesHQ checked Sep 3, 202610001+62,715

“Allied Universal®, a leading security and facility services company, provides proactive security services and cutting-edge smart technology to deliver evolving, tailored solutions…”

Source: company website · checked Sep 3, 2026
2
DSI Security ServicesPartial evidence
Dothan, AL, United StatesHQ checked Sep 3, 20261,001-5,0001,186

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

Source: company website · checked Sep 3, 2026
3
SOS Security LLCPartial evidence
Parsippany, CA, United StatesHQ checked Sep 3, 202610001+1,148

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

Source: company website · checked Sep 3, 2026
4
Titan Security GroupPartial evidence
Chicago, IL, United StatesHQ checked Sep 3, 20261,001-5,0001,133

“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: company website · checked Sep 3, 2026
5Herndon, VA, United StatesHQ checked Sep 3, 202610001+1,113

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: company website · checked Sep 3, 2026
6Pittsburgh, TX, United StatesHQ checked Sep 3, 20265,001-10,0001,057

“Founded in 1982, St.”

Source: company website · checked Sep 3, 2026
7
Security 101Partial evidence
West Palm Beach, NC, United StatesHQ checked Sep 3, 2026501-1,000850

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: company website · checked Sep 3, 2026
8
Northeast Security INCPartial evidence
Westwood, MA, United StatesHQ checked Sep 3, 20261,001-5,000744

“Improving Security.”

Source: company website · checked Sep 3, 2026
9St. Paul, NE, United StatesHQ checked Sep 3, 20261,001-5,000404

“American Security & Investigations has provided security and investigative services throughout the upper midwest since 1959.”

Source: company website · checked Sep 3, 2026
10
Elite Security & StaffingIndirect evidence
San Diego, FL, United StatesHQ checked Sep 3, 20265,001-10,000375

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

Source: company website · checked Sep 3, 2026
11Fort Lauderdale, FL, United StatesHQ checked Sep 3, 20261,001-5,000343

“Cambridge Security Services is a private security company that has been in business for more than 30 years.”

Source: company website · checked Sep 3, 2026
12Raleigh, VA, United StatesHQ checked Sep 3, 20261,001-5,000322

“United American Security was formed in 2010 to bring excellent regional security companies together.”

Source: company website · checked Sep 3, 2026
13Rockville Centre, FL, United StatesHQ checked Sep 3, 20261,001-5,000273

“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: company website · checked Sep 3, 2026
14Andover, VA, United StatesHQ checked Sep 3, 2026501-1,000249

“Minuteman Security & Life Safety is a leading provider of enterprise security system technology solutions.”

Source: company website · checked Sep 3, 2026
15Nashville, TN, United States501-1,000208

“Central Defense Security officers protect the human, intellectual and physical assets of our customers and their visitors.”

Source: company website · checked Sep 3, 2026
16
Acts-Aviation SecurityIndirect evidence
Des Plaines, IL, United StatesHQ checked Sep 3, 20261,001-5,000203

“As the U.S.”

Source: company website · checked Sep 3, 2026
17Smithtown, NY, United StatesHQ checked Sep 3, 20261,001-5,000192

“Strategic Security Corp (SSC) is a nationwide leading provider of integrated security solutions specializing in security guard services, event security, consulting, executive…”

Source: company website · checked Sep 3, 2026
18Overland Park, MO, United StatesHQ checked Sep 3, 2026501-1,000173

“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: company website · checked Sep 3, 2026
19Phoenix, AZ, United StatesHQ checked Sep 3, 2026501-1,000155

“Blackstone Security Services is proud to offer a wide variety of security services tailored to satisfy specific client needs.”

Source: company website · checked Sep 3, 2026
20
American SecurityPartial evidence
Greenville, SC, United StatesHQ checked Sep 3, 20261,001-5,000145

“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: company website · checked Sep 3, 2026
21
VTI SecurityPartial evidence
Burnsville, WI, United StatesHQ checked Sep 3, 20261,001-5,000143

“For almost 40 years, VTI has been called upon and recognized by our industry for a full range of advanced physical security technologies.”

Source: company website · checked Sep 3, 2026
22
Phoenix Protective CorpPartial evidence
Spokane Valley, WA, United StatesHQ checked Sep 3, 2026501-1,000141

“Phoenix Protective Corporation delivers proactive security solutions with highly trained, experienced security officers and outstanding customer protection.”

Source: company website · checked Sep 3, 2026
23
Lofton Security ServicePartial evidence
Baton Rouge, LA, United StatesHQ checked Sep 3, 20261,001-5,000135

“Founded in 1979, Lofton Security is the largest locally-owned, independent security and staffing company in the southern region.”

Source: company website · checked Sep 3, 2026
24Owensboro, KY, United StatesHQ checked Sep 3, 2026501-1,000129

“Nighthawk Security Company is a privately owned and operated company headquartered in western Kentucky.”

Source: company website · checked Sep 3, 2026
25
Security ONEPartial evidence
Memphis, TN, United StatesHQ checked Sep 3, 2026501-1,000126

Security One, Inc.”

Source: company website · checked Sep 3, 2026

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
11-50Median size (employees)
Los AngelesLargest hub · 37 HQs
29,307Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
367
11-50
457
51-200
208
201-500
73
501-1,000
42
1,001-5,000
25
5,001-10,000
6
10001+
6

Verified emails by last verification

0–30
0
31–60
966
61–90
6,612
90–180
3,782
180+
201

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 evidence 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 SmartSearch, 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.
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 an evidence 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

  • Healthcare security companies in Los Angeles37
  • Healthcare security companies in New York30

Frequently asked

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.

Ready to reach these companies? Verified emails and direct dials for all 1,189 healthcare security companies based in the United States. Start with a free account, no credit card.

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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.