Company lists · Data refreshed September 2026

Top 25 Workplace security consultants based in the United States

RevenueBase identified 3,381 workplace security consultants headquartered in the United States as of September 2026 and tracks 100,538 professional contacts across them, including 13,149 with verified work emails. New York is the largest hub.

This list covers workplace security consultants 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 29, 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 29, 2026 86% judged on-target in blind review
3,381Companies
100,538Contacts tracked
13,149Verified emails
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The 25 largest workplace security consultants based in the United States

Ranked by team size
Top 25 of 3,381 workplace security consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to workplace security consultants: 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
1Partial evidenceParsippany, NJ, United StatesHQ checked Sep 29, 202610001+38,634 contacts →

Partial evidence

“Securitas knows Security.”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceRoswell, GA, United StatesHQ checked Sep 29, 202610001+3,592 contacts →

Indirect evidence

“U.S.”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceAnnapolis, MD, United StatesHQ checked Sep 29, 20261,001-5,0002,025 contacts →

Indirect evidence

“Crisis24, a GardaWorld company, is widely regarded as the leading integrated risk management, crisis response, consulting, and global protective solutions firm, serving the…”

Source: RevenueBase Database · checked Sep 29, 2026
4Partial evidenceHerndon, VA, United StatesHQ checked Sep 29, 202610001+1,949 contacts →

Partial evidence

“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceColumbia, MD, United StatesHQ checked Sep 29, 20261,001-5,0001,655 contacts →

Indirect evidence

“Worldwide, we are most recognized for our leadership in fire protection engineering, a tradition of responsibility we have advanced with pride since 1939.”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidenceNew York, NY, United StatesHQ checked Sep 29, 202610001+1,375 contacts →

Partial evidence

“Guardsmark, LLC provides security services.”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceMorrisville, NC, United StatesHQ checked Sep 29, 2026501-1,0001,175 contacts →

Indirect evidence

“IEM is a professional services firm dedicated to building a safe, secure, and resilient world.”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceChicago, IL, United StatesHQ checked Sep 29, 20261,001-5,0001,138 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 29, 2026
9Partial evidenceBurbank, CA, United StatesHQ checked Sep 29, 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 29, 2026
10Indirect evidencePittsburgh, PA, United StatesHQ checked Sep 29, 20265,001-10,0001,062 contacts →

Indirect evidence

“Founded in 1982, St.”

Source: RevenueBase Database · checked Sep 29, 2026
11Strong evidencePearl River, NY, United StatesHQ checked Sep 29, 20265,001-10,0001,050 contacts →

Strong evidence

“Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceJacksonville, FL, United StatesHQ checked Sep 29, 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 29, 2026
13Partial evidenceWestwood, MA, United StatesHQ checked Sep 29, 20261,001-5,000748 contacts →

Partial evidence

“Improving Security.”

Source: RevenueBase Database · checked Sep 29, 2026
14Partial evidenceDallas, TX, United StatesHQ checked Sep 29, 20261,001-5,000678 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
15Strong evidenceLos Angeles, CA, United StatesHQ checked Sep 29, 20261,001-5,000626 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
16Partial evidenceGrand Rapids, MI, United StatesHQ checked Sep 29, 20261,001-5,000572 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceNew York, NY, United StatesHQ checked Sep 29, 202610001+571 contacts →

Indirect evidence

“Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.”

Source: RevenueBase Database · checked Sep 29, 2026
18Partial evidenceMiami, FL, United StatesHQ checked Sep 29, 20261,001-5,000553 contacts →

Partial evidence

“Security Alliance is a highly experienced provider of security solutions for private and business environments.”

Source: RevenueBase Database · checked Sep 29, 2026
19Partial evidenceNew York, NY, United StatesHQ checked Sep 29, 2026501-1,000519 contacts →

Partial evidence

“Mulligan is a Manhattan-based provider of the finest security and fire safety professionals available.”

Source: RevenueBase Database · checked Sep 29, 2026
20Partial evidenceSan Juan, United StatesHQ checked Sep 29, 20261,001-5,000511 contacts →

Partial evidence

“Founded in 1982, Ranger American is a professional security organization with an extensive background in the security and investigation fields.”

Source: RevenueBase Database · checked Sep 29, 2026
21Partial evidenceGardena, CA, United StatesHQ checked Sep 29, 2026501-1,000484 contacts →

Partial evidence

“American Guard Services is an established, reliable and accredited security protection firm.”

Source: RevenueBase Database · checked Sep 29, 2026
22Indirect evidenceStrongsville, OH, United StatesHQ checked Sep 29, 202651-200467 contacts →

Indirect evidence

“AFIMAC Global: Trusted Crisis Management & Business Continuity Partner.”

Source: RevenueBase Database · checked Sep 29, 2026
23Indirect evidenceMclean, VA, United StatesHQ checked Sep 29, 20261,001-5,000447 contacts →

Indirect evidence

“At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.”

Source: RevenueBase Database · checked Sep 29, 2026
24Partial evidenceUniondale, NY, United StatesHQ checked Sep 29, 20261,001-5,000426 contacts →

Partial evidence

“Established in 1976, Summit is one of the largest privately owned security services firms in the United States.”

Source: RevenueBase Database · checked Sep 29, 2026
25Partial evidenceRed Bank, NJ, United StatesHQ checked Sep 29, 20261,001-5,000416 contacts →

Partial evidence

“United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 3,381 workplace security consultants based in the United States

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Workplace security consultants based in the United States at a glance

As of Sep 29, 2026
13.1%Verified-email coverage
29.7Average contacts per company
1-10Median size (employees)
3.5%Largest-city concentration · New York
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
1,803
11-50
898
51-200
437
201-500
127
501-1,000
52
1,001-5,000
43
5,001-10,000
8
10001+
7

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 3,381 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 workplace security consultants, 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 “workplace security consultants”. 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 workplace security consultants), 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 workplace security consultants, 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, 13,149 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 29, 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 workplace security consultants, 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 workplace security consultants are there based in the United States?

RevenueBase identified 3,381 workplace security consultants 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?

Securitas Security Services Usa, INC, headquartered in Parsippany, tops this list with the largest team on record.

Which city has the most workplace security consultants?

New York leads with 119 headquartered companies, followed by Houston (70) and Washington (64).

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 13,149 verified decision-maker contacts tracked across these 3,381 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 29, 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.