Company lists · Data refreshed September 2026

Top 25 Critical infrastructure defense based in Los Angeles, United States

Name: Critical infrastructure defense based in Los Angeles, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 80 companies tracked

RevenueBase identified 80 critical infrastructure defense headquartered in Los Angeles, United States as of September 2026 and tracks 1,276 professional contacts across them, including 123 with verified work emails. New York is the largest hub.

This list covers critical infrastructure defense headquartered in Los Angeles, 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 16, 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 16, 2026 86% judged on-target in blind review

80Companies

1,276Contacts tracked

123Verified emails

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The 25 largest critical infrastructure defense based in Los Angeles, United States

Ranked by team size

Top 25 of 80 critical infrastructure defense based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to critical infrastructure defense: 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	Professional Security Consultants, INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	626 contacts →
	Indirect 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 16, 2026
2	Global Security Concepts	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	501-1,000	102 contacts →
	Indirect evidence “A security company committed to serving our clients at the highest level.” Source: RevenueBase Database · checked Sep 16, 2026
3	Crimson IT	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	51-200	43 contacts →
	Indirect evidence “Combining robust human and AI powered cyber security measures with efficient IT management, our business delivers comprehensive solutions.” Source: RevenueBase Database · checked Sep 16, 2026
4	LAW Security & Investigations	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	51-200	39 contacts →
	Indirect evidence “LSI is a full spectrum security solutions provider that specializes in manpower.” Source: RevenueBase Database · checked Sep 16, 2026
5	Bogaard Group International, INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	51-200	32 contacts →
	Indirect evidence “At BGI, we approach every project with a best practices philosophy and an aim to balance risks and threats with global market standards.” Source: RevenueBase Database · checked Sep 16, 2026
6	Allied International Security	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	51-200	32 contacts →
	Indirect evidence “Allied International Security offers armed/unarmed Guards, Patrol Services, CCTV Surveillance for businesses, construction sites, schools, etc.” Source: RevenueBase Database · checked Sep 16, 2026
7	Ollivier Managed Security Smart Site	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	28 contacts →
	Indirect evidence “Ollivier Corporation specializes in physical and networked security solutions to secure company assets, personnel, facilities, data, and to prevent fraud.” Source: RevenueBase Database · checked Sep 16, 2026
8	Divoro	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	24 contacts →
	Indirect evidence “Divoro is a provider of Cyber Security and Technology services to software and technology-enabled organizations.” Source: RevenueBase Database · checked Sep 16, 2026
9	Netready	Partial evidence	Los Angeles, United StatesHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “At Netready, we help Southern California businesses take control of their IT and Cybersecurity, from infrastructure and cloud systems to monitoring, compliance, and prevention.” Source: RevenueBase Database · checked Sep 16, 2026
10	Aventus Security LLC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	201-500	13 contacts →
	Indirect evidence “At Aventus Security, we are more than just a security service provider – we are your partners in safeguarding what matters most.” Source: RevenueBase Database · checked Sep 16, 2026
11	Dustwun	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1-10	7 contacts →
	Indirect evidence “DUSTWUN provides comprehensive bespoke security solutions for individuals and organizations around the globe.” Source: RevenueBase Database · checked Sep 16, 2026
12	Xcape, INC	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	6 contacts →
	Strong evidence “At Xcape, Inc.®, we are a team of cybersecurity professionals specializing in building, connecting, supporting, and securing mission-critical infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
13	Discloze	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	5 contacts →
	Indirect evidence “Discloze is a CREST-accredited offensive security firm based in the United States.” Source: RevenueBase Database · checked Sep 16, 2026
14	Dotwave Solutions	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	5 contacts →
	Indirect evidence “DotWave Solutions is a cybersecurity consulting firm founded by award-winning professor, Dr.” Source: RevenueBase Database · checked Sep 16, 2026
15	Itac Security	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1-10	5 contacts →
	Indirect evidence “Founded by ex-Israeli Police Special Forces Officer, ITAC provides specialty security services and tactical training.” Source: RevenueBase Database · checked Sep 16, 2026
16	Generative Strategies	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1-10	3 contacts →
	Indirect evidence “At Generative Strategies, we empower organizations to navigate the complex landscape of IT risk and cybersecurity with confidence and precision.” Source: RevenueBase Database · checked Sep 16, 2026
17	Redtorch INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence “RedTorch, Inc (RT) is poised to take over this market segment as at its core are decades of Cyber security technology research and development, cyber intelligence collection and…” Source: RevenueBase Database · checked Sep 16, 2026
18	Triad Consulting & System Design Group	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “Triad Consulting was formed by long-time industry professionals with proven track records of excellence.” Source: RevenueBase Database · checked Sep 16, 2026
19	Q4 Technologies	Indirect evidence	Los Angeles, United StatesHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “Q4 Technologies: Your Virtual Security Organization (VSO) Q4 Technologies, a Virtual Security Organization (VSO).” Source: RevenueBase Database · checked Sep 16, 2026
20	Preijersmak, LLC	Indirect evidence	Los Angeles, United StatesHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “PreijersMak, LLC (“PM”) provides crisis management and mitigation services to businesses in all sectors.” Source: RevenueBase Database · checked Sep 16, 2026
21	Qubric Security	Indirect evidence	Los Angeles, United StatesHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “Qubric Security is a cybersecurity consulting firm that helps organizations protect what they value most.” Source: RevenueBase Database · checked Sep 16, 2026
22	Wired World	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “We are here to offer our customers the best IT Services and Security solutions that help keep their businesses operational and cost effective.” Source: RevenueBase Database · checked Sep 16, 2026
23	US Armor Group	Indirect evidence	Los Angeles, United StatesHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence “US Armor Group’s Executive Team’s background include former Elite Military Special Operation and Law Enforcement Special Unit members, giving us the ability to address the threats…” Source: RevenueBase Database · checked Sep 16, 2026
24	Digital Security Consulting, INC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence “Digital Security Consulting offers information security consulting services to help our clients avoid costly breaches of security that often result in financial losses, a loss of…” Source: RevenueBase Database · checked Sep 16, 2026
25	Trinsecurity	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “We are a leading provider of advanced technology solutions that secure the vital assets of the world’s largest enterprises.” Source: RevenueBase Database · checked Sep 16, 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 defense. 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 defense.
Partial evidence: Its own public description names part of critical infrastructure defense, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical infrastructure defense. 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 80 critical infrastructure defense based in Los Angeles, United States

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Critical infrastructure defense based in Los Angeles, United States at a glance

As of Sep 16, 2026

9.6%Verified-email coverage

15.9Average contacts per company

11-50Median size (employees)

180.0%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured across the whole United States list rather than for Los Angeles, so it is reported there. Company counts and contact totals on this page are exact for Los Angeles, over 80 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 defense, 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 Los Angeles, United States whose own description of what they do matches “critical infrastructure defense”. 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 defense), 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 defense, and records with no verified work email. Companies headquartered outside Los Angeles 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, 123 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 16, 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 defense by metro in the United States

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 defense, 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 defense are there based in Los Angeles, United States?

RevenueBase identified 80 critical infrastructure defense headquartered in Los Angeles, 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?

Professional Security Consultants, INC, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most critical infrastructure defense?

New York leads with 144 headquartered companies, followed by Houston (121) and Washington (103).

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 123 verified decision-maker contacts tracked across these 80 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 16, 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.