Company lists · Data refreshed September 2026
Top 25 Security consulting firms based in the United States
RevenueBase identified 6,152 security consulting firms headquartered in the United States as of September 2026 and tracks 140,808 professional contacts across them, including 31,120 with verified work emails and 46,878 with mobile numbers. New York is the largest hub.
This list covers security 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, how directly it supports the match, and when it was last checked. Data refreshed September 6, 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.
The 25 largest security consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 38,634 | ||||
“Securitas knows Security.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 5,707 | ||||
“Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,592 | ||||
“U.S.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,500 | ||||
“The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,222 | ||||
“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 2,025 | ||||
“Crisis24, a GardaWorld company, is widely regarded as the leading integrated risk management, crisis response, consulting, and global protective solutions firm, serving the…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,949 | ||||
“Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,375 | ||||
“Guardsmark, LLC provides security services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,232 | ||||
“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1,175 | ||||
“IEM is a professional services firm dedicated to building a safe, secure, and resilient world.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,151 | ||||
“SOS Security is a known innovator and leader in the security and protective services industry.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,138 | ||||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,081 | ||||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,062 | ||||
“Founded in 1982, St.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,050 | ||||
“Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 874 | ||||
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 748 | ||||
“Improving Security.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 641 | ||||
“At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 629 | ||||
“Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 626 | ||||
“Professional Security Consultants, Inc.(PSC) is a world-class provider of security guard services, patrol, investigations, backgrounds, consulting, security screening & specialty…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 572 | ||||
“DK Security is unique in that it offers a single company for a wide ranging availability of security and investigative services.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 571 | ||||
“Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 557 | ||||
“For more than 25 years, SolomonEdwards has empowered organizations to tackle common and complex business challenges through strategic advisory, technical advocacy, and hands-on…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 553 | ||||
“Security Alliance is a highly experienced provider of security solutions for private and business environments.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 523 | ||||
“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: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 6,152 security consulting firms based in the United States
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Security consulting firms based in the United States at a glance
As of Sep 6, 2026Companies by employee count
Verified emails by last verification
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 consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 consulting firms”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among security 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 an evidence 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, 31,120 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 6, 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 consulting firms by metro
- Security consulting firms in New York189
- Security consulting firms in Washington139
- Security consulting firms in Houston124
- Security consulting firms in Atlanta118
- Security consulting firms in Austin96
- Security consulting firms in Chicago90
- Security consulting firms in Dallas90
- Security consulting firms in Los Angeles88
- Security consulting firms in Miami88
- Security consulting firms in San Francisco73
- Security consulting firms in Arlington65
- Security consulting firms in Tampa63
- Security consulting firms in Denver56
- Security consulting firms in San Diego55
- Security consulting firms in Alexandria53
- Security consulting firms in Charlotte53
- Security consulting firms in Seattle52
- Security consulting firms in Boston47
- Security consulting firms in Orlando43
- Security consulting firms in San Antonio43
- Security consulting firms in Las Vegas41
- Security consulting firms in Columbia39
- Security consulting firms in Phoenix39
- Security consulting firms in Reston37
- Security consulting firms in Raleigh36
- Security consulting firms in Minneapolis35
- Security consulting firms in Baltimore33
- Security consulting firms in Mclean33
- Security consulting firms in Huntsville29
- Security consulting firms in Columbus28
- Security consulting firms in Herndon28
- Security consulting firms in San Jose28
- Security consulting firms in Pittsburgh27
- Security consulting firms in Ashburn26
- Security consulting firms in Colorado Springs26
- Security consulting firms in Scottsdale26
- Security consulting firms in Philadelphia25
- Security consulting firms in Richmond25
Frequently asked
How many security consulting firms are there based in the United States?
RevenueBase identified 6,152 security 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?
Securitas Security Services Usa, INC, headquartered in Parsippany, tops this list with the largest team on record.
Which city has the most security consulting firms?
New York leads with 189 headquartered companies, followed by Washington (139) and Houston (124).
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 31,120 verified decision-maker contacts tracked across these 6,152 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 6, 2026.
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Security consulting firms by geography
- Security consulting firms based in the United Kingdom
- Security consulting firms based in France
- Security consulting firms based in Brazil
- Security consulting firms based in Canada
- Security consulting firms based in Germany
- Security consulting firms based in Australia
- Security consulting firms based in the Netherlands
- Security consulting firms based in Mexico
- Security consulting firms based in Italy
- Security consulting firms based in Spain
- Security consulting firms based in South Africa
- Security consulting firms based in Argentina
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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.
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