Company lists · Data refreshed September 2026

Top 25 Critical infrastructure protection companies based in the United States

Name: Critical infrastructure protection 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 19, 2026 2,184 companies tracked

RevenueBase identified 2,184 critical infrastructure protection companies headquartered in the United States as of September 2026 and tracks 50,029 professional contacts across them, including 15,537 with verified work emails. New York is the largest hub.

This list covers critical infrastructure protection 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 19, 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 19, 2026 86% judged on-target in blind review

2,184Companies

50,029Contacts tracked

15,537Verified emails

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The 25 largest critical infrastructure protection companies based in the United States

Ranked by team size

Top 25 of 2,184 critical infrastructure protection companies based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to critical infrastructure protection 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	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,222 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 19, 2026
2	Crisis24	Partial evidence	Annapolis, MD, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,025 contacts →
	Partial 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 19, 2026
3	Pinkerton Comprehensive Risk Management	Indirect evidence	Ann Arbor, MI, United StatesHQ checked Sep 19, 2026	1,001-5,000	2,022 contacts →
	Indirect evidence “Pinkerton, established in 1850 by Allan Pinkerton, stands as a leading global provider of security and risk management solutions.” Source: RevenueBase Database · checked Sep 19, 2026
4	Paragon Systems INC	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 19, 2026	10001+	1,949 contacts →
	Indirect 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 19, 2026
5	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 19, 2026
6	IEM	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 19, 2026	501-1,000	1,175 contacts →
	Indirect evidence “IEM is a professional services firm dedicated to building a safe, secure, and resilient world.” Source: RevenueBase Database · checked Sep 19, 2026
7	Brosnan Risk Consultants	Indirect evidence	Pearl River, NY, United StatesHQ checked Sep 19, 2026	5,001-10,000	1,050 contacts →
	Indirect 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 19, 2026
8	Northeast Security INC	Indirect evidence	Westwood, MA, United StatesHQ checked Sep 19, 2026	1,001-5,000	748 contacts →
	Indirect evidence “Improving Security.” Source: RevenueBase Database · checked Sep 19, 2026
9	Telos Corporation	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 19, 2026	501-1,000	629 contacts →
	Indirect evidence “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: RevenueBase Database · checked Sep 19, 2026
10	MSA Security	Partial evidence	New York, NY, United StatesHQ checked Sep 19, 2026	10001+	571 contacts →
	Partial evidence “Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
11	Security Alliance	Indirect evidence	Miami, FL, United StatesHQ checked Sep 19, 2026	1,001-5,000	553 contacts →
	Indirect evidence “Security Alliance is a highly experienced provider of security solutions for private and business environments.” Source: RevenueBase Database · checked Sep 19, 2026
12	Dragos, INC	Strong evidence	Hanover, MD, United StatesHQ checked Sep 19, 2026	501-1,000	551 contacts →
	Strong evidence “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Source: RevenueBase Database · checked Sep 19, 2026
13	Raycap	Partial evidence	Post Falls, ID, United StatesHQ checked Sep 19, 2026	1,001-5,000	538 contacts →
	Partial evidence “Raycap is a privately-held technology solutions provider offering products and services that support and protect the world’s critical telecommunications, energy, transportation…” Source: RevenueBase Database · checked Sep 19, 2026
14	Xcelerate Solutions	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 19, 2026	1,001-5,000	447 contacts →
	Indirect evidence “At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Source: RevenueBase Database · checked Sep 19, 2026
15	United Security, Inc. USI	Indirect evidence	Red Bank, NJ, United StatesHQ checked Sep 19, 2026	1,001-5,000	416 contacts →
	Indirect evidence “United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.” Source: RevenueBase Database · checked Sep 19, 2026
16	Nozomi Networks	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 19, 2026	201-500	375 contacts →
	Strong evidence “We protect the world’s critical infrastructure from cyber threats.” Source: RevenueBase Database · checked Sep 19, 2026
17	Vantage Point Solutions	Indirect evidence	Mitchell, SD, United StatesHQ checked Sep 19, 2026	501-1,000	334 contacts →
	Indirect evidence “Vantage Point is a premier engineering and consulting firm serving the broadband, energy, enterprise, and banking industries.” Source: RevenueBase Database · checked Sep 19, 2026
18	Huntleigh USA	Indirect evidence	Irving, TX, United StatesHQ checked Sep 19, 2026	1,001-5,000	315 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 19, 2026
19	Cook Solutions Group	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	201-500	308 contacts →
	Indirect evidence “At Cook Solutions Group (CSG) we are all about service and fulfillment following one motto, “We Make it Happen!” Simple \| Secure \| Service \| Solutions.” Source: RevenueBase Database · checked Sep 19, 2026
20	Logically	Indirect evidence	Dublin, OH, United StatesHQ checked Sep 19, 2026	201-500	300 contacts →
	Indirect evidence “Welcome to Logically.” Source: RevenueBase Database · checked Sep 19, 2026
21	Feditc	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 19, 2026	201-500	296 contacts →
	Indirect evidence “Founded in 2003, FEDITC, LLC is an ISO and CMMI level 3 certified cyber security, IT, and engineering services firm.” Source: RevenueBase Database · checked Sep 19, 2026
22	Global Elite Group	Indirect evidence	Garden City, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	282 contacts →
	Indirect evidence “Global Elite Group, headquartered in Garden City, NY, is a leading provider of security services worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
23	Doyle Security Services, Inc. DSS	Indirect evidence	Rockville Centre, NY, United StatesHQ checked Sep 19, 2026	1,001-5,000	275 contacts →
	Indirect 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 19, 2026
24	GSG Protective Services	Partial evidence	Lawndale, CA, United StatesHQ checked Sep 19, 2026	501-1,000	271 contacts →
	Partial evidence “GSG Protective Services is a full-service provider of quality security services specializing in 6 divisions: investigations, physical security, protective services, technology…” Source: RevenueBase Database · checked Sep 19, 2026
25	Guidepost Solutions	Indirect evidence	New York, NY, United StatesHQ checked Sep 19, 2026	201-500	268 contacts →
	Indirect evidence “We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: RevenueBase Database · checked Sep 19, 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: critical infrastructure protection 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 critical infrastructure protection companies.
Partial evidence: Its own public description names part of critical infrastructure protection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical infrastructure protection 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 2,184 critical infrastructure protection companies based in the United States

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Critical infrastructure protection companies based in the United States at a glance

As of Sep 19, 2026

31.1%Verified-email coverage

22.9Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · New York

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,115

11-50

678

51-200

244

201-500

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 2,184 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 critical infrastructure protection 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 “critical infrastructure protection 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 critical infrastructure protection 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 critical infrastructure protection 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, 15,537 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 19, 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.

Critical infrastructure protection 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 critical infrastructure protection 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 critical infrastructure protection companies are there based in the United States?

RevenueBase identified 2,184 critical infrastructure protection 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?

OPTIV, headquartered in Leawood, tops this list with the largest team on record.

Which city has the most critical infrastructure protection companies?

New York leads with 65 headquartered companies, followed by Washington (56) and Houston (53).

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 15,537 verified decision-maker contacts tracked across these 2,184 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 19, 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.