Company lists · Data refreshed September 2026
Top 25 Critical infrastructure security consultants worldwide
RevenueBase identified 12,961 critical infrastructure security consultants worldwide as of September 2026 and tracks 171,892 professional contacts across them, including 46,067 with verified work emails. The United States is the largest market and London the largest hub.
This list covers critical infrastructure security consultants worldwide, 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 27, 2026. Country and city lists for critical infrastructure security consultants follow the table.
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.
The 25 largest critical infrastructure security consultants worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 6,667 contacts → | ||||
Strong evidence “Who we are: Amey is a global, integrated infrastructure consultancy and operations partner.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 2,025 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 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,455 contacts → | ||||
Partial evidence “ICTS Europe is Europe’s leading security specialist.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 1,437 contacts → | ||||
Indirect evidence “With offices in the UK and Australia, Frazer-Nash is a leading systems, engineering and technology company.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,431 contacts → | ||||
Indirect evidence “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,378 contacts → | ||||
Indirect evidence “We are established for enriching local content in designing, developing, and operating secure digital computing environments through Saudi talents, by fulfilling our role as a…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,050 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 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,041 contacts → | ||||
Indirect evidence “A lo largo de 30 años, hemos incursionado y evolucionado en distintas áreas atendiendo en el continente americano a clientes privados, corporativos y sector gobierno.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 875 contacts → | ||||
Strong evidence “ABSG Consulting Inc.(ABS Consulting) is part of ABS Group of Companies, a global leader in safety and risk management for critical infrastructure worldwide and a wholly owned…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 683 contacts → | ||||
Strong evidence “We are a European company specialising in cybersecurity, cyberintelligence and cyberdefence, with more than 20 years of experience protecting critical infrastructures and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 16 | 673 contacts → | ||||
Strong evidence “A10 Networks provides security and infrastructure solutions for on-premises, hybrid cloud, and edge-cloud environments.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 17 | 642 contacts → | ||||
Partial evidence “Halogen Group formerly known as Halogen Security Company Limited is the leading Security Solutions Provider in West Africa.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 18 | 639 contacts → | ||||
Indirect evidence “I-TRACING, pure player and cybersecurity service provider leader in France, supports over 600 clients around the world in managing their cyber risks, from anticipating threats to…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 553 contacts → | ||||
Partial evidence “Security Alliance is a highly experienced provider of security solutions for private and business environments.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 23 | 525 contacts → | ||||
Indirect evidence “Protection is Paramount!” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 506 contacts → | ||||
Indirect evidence “Founded in 2008, OWN is a Pure Player in cybersecurity, with offices in Paris, Rennes and Toulouse, but with a presence throughout France with its fully remote employees.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
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 security consultants. 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 security consultants.
- Partial evidence
- Its own public description names part of critical infrastructure security consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name critical infrastructure security consultants. 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 12,961 critical infrastructure security consultants worldwide
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Critical infrastructure security consultants worldwide at a glance
As of Sep 27, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 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.
- Coverage
- Every country. Country and city lists for critical infrastructure security consultants are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “critical infrastructure 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 critical infrastructure 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 critical infrastructure security consultants, and records with no verified work email.
- 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, 46,067 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 27, 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 security consultants by location
91 lists · largest firstEvery Critical infrastructure security consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Critical infrastructure security consultants based in the United States3,298
- Critical infrastructure security consultants based in the United Kingdom882
- Critical infrastructure security consultants based in India576
- Critical infrastructure security consultants based in France532
- Critical infrastructure security consultants based in Australia424
- Critical infrastructure security consultants based in Brazil414
- Critical infrastructure security consultants based in Canada406
- Critical infrastructure security consultants based in Germany379
- Critical infrastructure security consultants based in the Netherlands227
- Critical infrastructure security consultants based in Italy220
- Critical infrastructure security consultants based in Mexico203
- Critical infrastructure security consultants based in Spain200
- Critical infrastructure security consultants based in the United Arab Emirates185
- Critical infrastructure security consultants based in Israel156
- Critical infrastructure security consultants based in Switzerland150
- Critical infrastructure security consultants based in Sweden142
- Critical infrastructure security consultants based in Belgium124
- Critical infrastructure security consultants based in South Africa116
- Critical infrastructure security consultants based in Türkiye116
- Critical infrastructure security consultants based in Colombia115
- Critical infrastructure security consultants based in Chile99
- Critical infrastructure security consultants based in Poland96
- Critical infrastructure security consultants based in Argentina79
- Critical infrastructure security consultants based in Singapore70
- Critical infrastructure security consultants based in Saudi Arabia68
- Critical infrastructure security consultants based in Indonesia67
- Critical infrastructure security consultants based in Denmark66
- Critical infrastructure security consultants based in New Zealand59
- Critical infrastructure security consultants based in Nigeria56
- Critical infrastructure security consultants based in Austria55
- Critical infrastructure security consultants based in Ireland42
- Critical infrastructure security consultants based in Malaysia42
- Critical infrastructure security consultants based in Romania40
- Critical infrastructure security consultants based in Greece38
- Critical infrastructure security consultants based in Ecuador32
- Critical infrastructure security consultants based in Kenya32
- Critical infrastructure security consultants based in Portugal30
- Critical infrastructure security consultants based in Ukraine29
- Critical infrastructure security consultants based in Finland27
- Critical infrastructure security consultants based in Hungary26
- Critical infrastructure security consultants based in Norway25
Cities
- Critical infrastructure security consultants based in London, United Kingdom320
- Critical infrastructure security consultants based in Paris, France153
- Critical infrastructure security consultants based in Sao Paulo, Brazil142
- Critical infrastructure security consultants based in Dubai, United Arab Emirates100
- Critical infrastructure security consultants based in Melbourne, Australia89
- Critical infrastructure security consultants based in Toronto, Canada88
- Critical infrastructure security consultants based in Washington, United States88
- Critical infrastructure security consultants based in New York, United States87
- Critical infrastructure security consultants based in Sydney, Australia81
- Critical infrastructure security consultants based in Houston, United States72
- Critical infrastructure security consultants based in Stockholm, Sweden64
- Critical infrastructure security consultants based in Atlanta, United States62
- Critical infrastructure security consultants based in Singapore, Singapore60
- Critical infrastructure security consultants based in Austin, United States51
- Critical infrastructure security consultants based in Madrid, Spain51
- Critical infrastructure security consultants based in Dallas, United States48
- Critical infrastructure security consultants based in Istanbul, Türkiye48
- Critical infrastructure security consultants based in Mumbai, India47
- Critical infrastructure security consultants based in Bangalore, India42
- Critical infrastructure security consultants based in Brisbane, Australia41
- Critical infrastructure security consultants based in Miami, United States41
- Critical infrastructure security consultants based in Ottawa, Canada41
- Critical infrastructure security consultants based in Calgary, Canada40
- Critical infrastructure security consultants based in Hyderabad, India40
- Critical infrastructure security consultants based in Los Angeles, United States40
- Critical infrastructure security consultants based in Montreal, Canada39
- Critical infrastructure security consultants based in Riyadh, Saudi Arabia39
- Critical infrastructure security consultants based in Tampa, United States38
- Critical infrastructure security consultants based in Barcelona, Spain36
- Critical infrastructure security consultants based in Chicago, United States36
- Critical infrastructure security consultants based in Rio De Janeiro, Brazil36
- Critical infrastructure security consultants based in Charlotte, United States34
- Critical infrastructure security consultants based in Chennai, India34
- Critical infrastructure security consultants based in Pune, India34
- Critical infrastructure security consultants based in Tel Aviv, Israel34
- Critical infrastructure security consultants based in Arlington, United States33
- Critical infrastructure security consultants based in Alexandria, United States32
- Critical infrastructure security consultants based in Berlin, Germany32
- Critical infrastructure security consultants based in San Francisco, United States32
- Critical infrastructure security consultants based in Santiago, Chile31
- Critical infrastructure security consultants based in Nairobi, Kenya30
- Critical infrastructure security consultants based in Bengaluru, India29
- Critical infrastructure security consultants based in Johannesburg, South Africa29
- Critical infrastructure security consultants based in Denver, United States28
- Critical infrastructure security consultants based in San Diego, United States28
- Critical infrastructure security consultants based in Vancouver, Canada28
- Critical infrastructure security consultants based in Warszawa, Poland28
- Critical infrastructure security consultants based in Ahmedabad, India27
- Critical infrastructure security consultants based in Boston, United States26
- Critical infrastructure security consultants based in Manchester, United Kingdom25
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 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 critical infrastructure security consultants are there worldwide?
RevenueBase identified 12,961 critical infrastructure security consultants worldwide 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?
Private Sector, headquartered in Worldwide, tops this list with the largest team on record.
Which country has the most critical infrastructure security consultants?
The United States leads with 3,298 companies, followed by the United Kingdom (882) and India (576). Every critical infrastructure security consultants list by country and city is linked on this page.
Which city has the most critical infrastructure security consultants?
London leads with 325 headquartered companies, followed by Paris (153) and Sao Paulo (142).
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 46,067 verified decision-maker contacts tracked across these 12,961 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 27, 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.