Company lists · Data refreshed September 2026

Top 25 Facility security consulting firms based in the United States

Name: Facility security consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,068 companies tracked

RevenueBase identified 4,068 company matches for facility security consulting firms associated with the United States as of September 2026 and tracks 125,544 professional contacts across them, including 15,470 with verified work emails. New York is the largest hub.

This list covers company matches for facility security consulting firms 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 September 28, 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 Sep 28, 2026 How this list was built

4,068Companies

125,544Contacts tracked

15,470Verified emails

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The 25 largest facility security consulting firms based in the United States

Ranked by team size

Top 25 of 4,068 company matches for facility security consulting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Securitas Security Services Usa, INC	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 28, 2026	10001+	38,634 contacts →
	Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Unemployed	Exact match	St. Petersburg, FL, United StatesHQ recorded Sep 28, 2026	n/a	4,038 contacts →
	Exact match “Excelsior Defense is a security and investigations company based out of St.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	U.S. Security Associates, INC	Exact match	Roswell, GA, United StatesHQ recorded Sep 28, 2026	10001+	3,592 contacts →
	Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Security Industry Specialists	Exact match	Culver City, CA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	2,500 contacts →
	Exact match “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Everon	Exact match	Irving, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,045 contacts →
	Exact match “Everon is a leading national provider of commercial security, video, fire, sprinkler, and life safety solutions for complex, multi-site businesses and organizations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 2026	10001+	1,949 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Guardsmark	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	10001+	1,375 contacts →
	Exact match “Guardsmark, LLC provides security services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	SOS Security LLC	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 28, 2026	10001+	1,151 contacts →
	Exact match “SOS Security is a known innovator and leader in the security and protective services industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Titan Security Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,138 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 · Sep 28, 2026 · View company records in RevenueBase
10	PER MAR Security Services	Exact match	Davenport, IA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,120 contacts →
	Exact match “Per Mar Security Services is the largest full-service security solutions provider in the Midwest.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Securitas Critical Infrastructure Services, INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 2026	10001+	1,118 contacts →
	Exact match “Securitas Critical Infrastructure Services, Inc.(SCIS) is a provider of specialized security and fire services to the highly regulated Nuclear, Aerospace, Defense, Energy, and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Andrews International	Exact match	Burbank, CA, United StatesHQ recorded Sep 28, 2026	10001+	1,081 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	St. Moritz Security Services, INC	Exact match	Pittsburgh, PA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	1,062 contacts →
	Exact match “Founded in 1982, St.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Brosnan Risk Consultants	Exact match	Pearl River, NY, United StatesHQ recorded Sep 28, 2026	5,001-10,000	1,050 contacts →
	Exact match “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	PPC	Exact match	Trevose, PA, United StatesHQ recorded Sep 28, 2026	201-500	979 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Security 101	Exact match	West Palm Beach, FL, United StatesHQ recorded Sep 28, 2026	501-1,000	849 contacts →
	Exact match “Security 101® is a nationwide leader in designing, installing, and maintaining advanced security systems tailored to the unique needs of organizations of all sizes.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Northeast Security INC	Exact match	Westwood, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	748 contacts →
	Exact match “Improving Security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Akal Security	Exact match	Espanola, NM, United StatesHQ recorded Sep 28, 2026	10001+	741 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 · Sep 28, 2026 · View company records in RevenueBase
19	Omniplex World Services Corporation	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	677 contacts →
	Exact match “OMNIPLEX World Services Corporation is a leader and innovator in delivering professional background investigations, intelligence support, and physical security services to…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Sallyport Global	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	629 contacts →
	Exact match “Sallyport Global a Caliburn company is a global provider of a full spectrum of security and mission support solutions tailored to enable global security and stability operations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Professional Security Consultants, INC	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	626 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 · Sep 28, 2026 · View company records in RevenueBase
22	DK Security	Exact match	Grand Rapids, MI, United StatesHQ recorded Sep 28, 2026	1,001-5,000	572 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 · Sep 28, 2026 · View company records in RevenueBase
23	MSA Security	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	10001+	571 contacts →
	Exact match “Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Security Alliance	Exact match	Miami, FL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	553 contacts →
	Exact match “Security Alliance is a highly experienced provider of security solutions for private and business environments.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Mulligan Security	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	519 contacts →
	Exact match “Mulligan is a Manhattan-based provider of the finest security and fire safety professionals available.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “facility security consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 4,068 facility security consulting firms based in the United States

See the full list, filter by size, metro and specialty, and access 15,470 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Facility security consulting firms based in the United States at a glance

As of Sep 28, 2026

12.3%Verified-email coverage

30.9Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,941

11-50

1,255

51-200

543

201-500

171

501-1,000

1,001-5,000

5,001-10,000

10001+

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 4,068 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 “facility security consulting firms” 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 15,470 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 September 28, 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.

Facility security consulting firms by metro

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 “facility security consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many facility security consulting firms are there based in the United States?

RevenueBase identified 4,068 company matches for facility security consulting firms associated with the United States as of September 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 facility security consulting firms?

New York leads with 130 company records, followed by Houston (83) and Miami (71).

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 15,470 professional contacts with verified work emails tracked across these 4,068 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 September 28, 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.