Company lists · Data refreshed September 2026

Top 25 Security transformation consulting firms based in the United States

Name: Security transformation 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 29, 2026 5,391 companies tracked

RevenueBase identified 5,391 security transformation consulting firms headquartered in the United States as of September 2026 and tracks 69,669 professional contacts across them, including 25,933 with verified work emails. New York is the largest hub.

This list covers security transformation consulting firms 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

5,391Companies

69,669Contacts tracked

25,933Verified emails

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

Ranked by team size

Top 25 of 5,391 security transformation consulting firms 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 security transformation consulting firms: 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	Security Industry Specialists	Partial evidence	Culver City, CA, United StatesHQ checked Sep 29, 2026	5,001-10,000	2,500 contacts →
	Partial evidence “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Source: RevenueBase Database · checked Sep 29, 2026
2	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 29, 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 29, 2026
3	Forcepoint	Partial evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,636 contacts →
	Partial evidence “Forcepoint simplifies security for global businesses and governments.” Source: RevenueBase Database · checked Sep 29, 2026
4	Trace3	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,345 contacts →
	Partial evidence “Trace3 delivers business transformation.” Source: RevenueBase Database · checked Sep 29, 2026
5	Thales Cybersecurity Products	Indirect evidence	Austin, TX, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,252 contacts →
	Indirect evidence “Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.” Source: RevenueBase Database · checked Sep 29, 2026
6	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 29, 2026	1,001-5,000	1,232 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 29, 2026
7	Brosnan Risk Consultants	Partial evidence	Pearl River, NY, United StatesHQ checked Sep 29, 2026	5,001-10,000	1,050 contacts →
	Partial 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
8	Trustwave, A Levelblue Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 29, 2026	501-1,000	874 contacts →
	Indirect evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 29, 2026
9	Cyderes	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 29, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 29, 2026
10	SDG Corporation	Partial evidence	Norwalk, CT, United StatesHQ checked Sep 29, 2026	201-500	660 contacts →
	Partial evidence “With more than 30 years of experience partnering with global enterprises on complex business and IT initiatives, SDG is a trusted provider of advisory, transformation, and managed…” Source: RevenueBase Database · checked Sep 29, 2026
11	Telos Corporation	Partial evidence	Ashburn, VA, United StatesHQ checked Sep 29, 2026	501-1,000	629 contacts →
	Partial 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 29, 2026
12	Mentormate	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 29, 2026	1,001-5,000	626 contacts →
	Indirect evidence “MentorMate is now Tieto!” Source: RevenueBase Database · checked Sep 29, 2026
13	Planned Systems International	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 29, 2026	1,001-5,000	611 contacts →
	Indirect evidence “Since 1988, PSI teams have provided our government customers with innovative, cost effective solutions that solve today’s complex challenges, improve operational efficiencies, and…” Source: RevenueBase Database · checked Sep 29, 2026
14	Ultraviolet Cyber	Partial evidence	Mclean, VA, United StatesHQ checked Sep 29, 2026	501-1,000	523 contacts →
	Partial evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: RevenueBase Database · checked Sep 29, 2026
15	Core BTS	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 29, 2026	501-1,000	523 contacts →
	Partial evidence “Core BTS, an NRI Group Company, is a full-service digital transformation consultancy that helps the world’s most impactful companies leverage today’s most powerful technologies to…” Source: RevenueBase Database · checked Sep 29, 2026
16	Aujas Cybersecurity	Indirect evidence	Cupertino, CA, United StatesHQ checked Sep 29, 2026	1,001-5,000	473 contacts →
	Indirect evidence “At Aujas Cybersecurity, we specialize in building and transforming cybersecurity postures to help businesses effectively mitigate risks.” Source: RevenueBase Database · checked Sep 29, 2026
17	Xcelerate Solutions	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 29, 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 29, 2026
18	United Security, Inc. USI	Partial evidence	Red Bank, NJ, United StatesHQ checked Sep 29, 2026	1,001-5,000	416 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
19	Appgate	Indirect evidence	Coral Gables, FL, United StatesHQ checked Sep 29, 2026	501-1,000	381 contacts →
	Indirect evidence “AppGate secures and protects an organization's most valuable assets with its high performance Zero Trust Network Access (ZTNA) solution and Cyber Advisory Services.” Source: RevenueBase Database · checked Sep 29, 2026
20	Paladion An Atos Business	Indirect evidence	Reston, VA, United StatesHQ checked Sep 29, 2026	501-1,000	369 contacts →
	Indirect evidence “As of April 2023, Paladion is part of Atos Group.” Source: RevenueBase Database · checked Sep 29, 2026
21	IBN Technologies	Indirect evidence	Miami, FL, United StatesHQ checked Sep 29, 2026	51-200	365 contacts →
	Indirect evidence “Welcome to IBN Technologies, LLC, Your Trusted Partner in Cybersecurity, Cloud, and Finance Solutions With 26+ years of expertise, IBN Technologies leads in delivering integrated…” Source: RevenueBase Database · checked Sep 29, 2026
22	Issquared, INC	Strong evidence	Westlake Village, CA, United StatesHQ checked Sep 29, 2026	201-500	353 contacts →
	Strong evidence “About ISSQUARED, Inc: An emerging value provider across an array of digital transformation solutions to address on-demand security and governance needs.” Source: RevenueBase Database · checked Sep 29, 2026
23	IANS	Partial evidence	Boston, MA, United StatesHQ checked Sep 29, 2026	51-200	327 contacts →
	Partial evidence “For the security practitioner caught between rapidly evolving threats and demanding executives, IANS Research is a clear-headed resource for decision-making and articulating risk.” Source: RevenueBase Database · checked Sep 29, 2026
24	Security Risk Advisors	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 29, 2026	201-500	315 contacts →
	Partial evidence “We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.” Source: RevenueBase Database · checked Sep 29, 2026
25	Logically	Indirect evidence	Dublin, OH, United StatesHQ checked Sep 29, 2026	201-500	300 contacts →
	Indirect evidence “Welcome to Logically.” Source: RevenueBase Database · checked Sep 29, 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: security transformation consulting firms. 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 security transformation consulting firms.
Partial evidence: Its own public description names part of security transformation consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name security transformation consulting firms. 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 5,391 security transformation consulting firms based in the United States

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Security transformation consulting firms based in the United States at a glance

As of Sep 29, 2026

37.2%Verified-email coverage

12.9Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · New York

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

3,242

11-50

1,524

51-200

457

201-500

100

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 5,391 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 security transformation consulting firms, 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 “security transformation consulting firms”. 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 security transformation consulting firms), 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 security transformation consulting firms, 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, 25,933 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.

Security transformation consulting firms 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 security transformation consulting firms, 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 security transformation consulting firms are there based in the United States?

RevenueBase identified 5,391 security transformation consulting firms 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?

Security Industry Specialists, headquartered in Culver City, tops this list with the largest team on record.

Which city has the most security transformation consulting firms?

New York leads with 168 headquartered companies, followed by Washington (116) and Atlanta (112).

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 25,933 verified decision-maker contacts tracked across these 5,391 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.