Company lists · Data refreshed September 2026
Top 25 Critical infrastructure security consulting companies worldwide
RevenueBase identified 23,398 critical infrastructure security consulting companies worldwide as of September 2026 and tracks 362,821 professional contacts across them, including 89,391 with verified work emails. The United States is the largest market and London the largest hub.
This list covers critical infrastructure security consulting companies 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 consulting companies 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 consulting companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 12,815 contacts → | ||||
Indirect evidence “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 2 | 12,771 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 3 | 10,851 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 4 | 10,793 contacts → | ||||
Indirect evidence “At Peraton, we're at the forefront of delivering the next big thing every day.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 5 | 6,667 contacts → | ||||
Partial 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. | |||||
| 6 | 3,387 contacts → | ||||
Partial evidence “Il Gruppo Sicuritalia, con oltre 18.500 dipendenti, è la più grande azienda italiana ed il secondo player privato europeo in ambito Security.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 7 | 2,972 contacts → | ||||
Indirect evidence “Control Risks is a global specialist risk consultancy that helps to create secure, compliant and resilient organisations.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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. | |||||
| 9 | 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 27, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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. | |||||
| 11 | 1,842 contacts → | ||||
Indirect evidence “Wilson James provides safe, secure, customer-led solutions to more than 300 clients across the UK and Europe.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 12 | 1,655 contacts → | ||||
Indirect evidence “Worldwide, we are most recognized for our leadership in fire protection engineering, a tradition of responsibility we have advanced with pride since 1939.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 13 | 1,560 contacts → | ||||
Partial evidence “In an era of accelerating change, Exponent is the only premium engineering and scientific consulting firm with the depth and breadth of expertise to solve our clients’ most…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,532 contacts → | ||||
Strong evidence “Leidos Dynetics provides responsive, cost-effective engineering, scientific, IT solutions to the national security, cybersecurity, space, and critical infrastructure sectors.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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. | |||||
| 16 | 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. | |||||
| 17 | 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. | |||||
| 18 | 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. | |||||
| 19 | 1,374 contacts → | ||||
Partial evidence “First Security Group LLC was founded in 2004 with the vision of His Highness, the Vice President, Prime Minister, and Ruler of Dubai, Sheikh Mohamed bin Rashid Al Maktoum.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,340 contacts → | ||||
Partial evidence “At Imvula Quality Protection, we don’t just provide security, we create peace of mind.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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. | |||||
| 22 | 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. | |||||
| 23 | 1,151 contacts → | ||||
Partial evidence “SOS Security is a known innovator and leader in the security and protective services industry.” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,118 contacts → | ||||
Strong evidence “Securitas Critical Infrastructure Services, Inc.(SCIS) is a provider of specialized security and fire services to the highly regulated Nuclear, Aerospace, Defense, Energy, and…” Source: RevenueBase Database · checked Sep 27, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1,081 contacts → | ||||
Partial evidence “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: 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 consulting 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 security consulting companies.
- Partial evidence
- Its own public description names part of critical infrastructure security consulting 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 security consulting 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 23,398 critical infrastructure security consulting companies worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 89,391 reachable decision-makers.
Free signup · no credit card
Critical infrastructure security consulting companies 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 consulting 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.
- Coverage
- Every country. Country and city lists for critical infrastructure security consulting companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “critical infrastructure security consulting 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 security consulting 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 security consulting companies, 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, 89,391 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 consulting companies by location
153 lists · largest firstEvery Critical infrastructure security consulting companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Critical infrastructure security consulting companies based in the United States6,159
- Critical infrastructure security consulting companies based in the United Kingdom1,491
- Critical infrastructure security consulting companies based in India1,119
- Critical infrastructure security consulting companies based in France873
- Critical infrastructure security consulting companies based in Brazil836
- Critical infrastructure security consulting companies based in Australia722
- Critical infrastructure security consulting companies based in Canada700
- Critical infrastructure security consulting companies based in Germany612
- Critical infrastructure security consulting companies based in Mexico426
- Critical infrastructure security consulting companies based in Italy394
- Critical infrastructure security consulting companies based in the Netherlands377
- Critical infrastructure security consulting companies based in Spain357
- Critical infrastructure security consulting companies based in the United Arab Emirates341
- Critical infrastructure security consulting companies based in Colombia242
- Critical infrastructure security consulting companies based in South Africa239
- Critical infrastructure security consulting companies based in Israel226
- Critical infrastructure security consulting companies based in Sweden216
- Critical infrastructure security consulting companies based in Switzerland214
- Critical infrastructure security consulting companies based in Türkiye210
- Critical infrastructure security consulting companies based in Chile206
- Critical infrastructure security consulting companies based in Belgium182
- Critical infrastructure security consulting companies based in Argentina167
- Critical infrastructure security consulting companies based in Poland149
- Critical infrastructure security consulting companies based in Saudi Arabia143
- Critical infrastructure security consulting companies based in Nigeria126
- Critical infrastructure security consulting companies based in Peru125
- Critical infrastructure security consulting companies based in Pakistan115
- Critical infrastructure security consulting companies based in Singapore109
- Critical infrastructure security consulting companies based in Indonesia101
- Critical infrastructure security consulting companies based in Austria96
- Critical infrastructure security consulting companies based in Denmark90
- Critical infrastructure security consulting companies based in New Zealand90
- Critical infrastructure security consulting companies based in Kenya77
- Critical infrastructure security consulting companies based in Morocco76
- Critical infrastructure security consulting companies based in Romania72
- Critical infrastructure security consulting companies based in Egypt70
- Critical infrastructure security consulting companies based in Ireland69
- Critical infrastructure security consulting companies based in Malaysia69
- Critical infrastructure security consulting companies based in Portugal69
- Critical infrastructure security consulting companies based in Ecuador67
- Critical infrastructure security consulting companies based in Greece66
- Critical infrastructure security consulting companies based in Norway61
- Critical infrastructure security consulting companies based in Ukraine52
- Critical infrastructure security consulting companies based in Finland50
- Critical infrastructure security consulting companies based in Qatar45
- Critical infrastructure security consulting companies based in the Philippines42
- Critical infrastructure security consulting companies based in Hungary41
- Critical infrastructure security consulting companies based in Japan41
- Critical infrastructure security consulting companies based in Luxembourg38
- Critical infrastructure security consulting companies based in Bulgaria36
- Critical infrastructure security consulting companies based in Jordan33
- Critical infrastructure security consulting companies based in Thailand32
- Critical infrastructure security consulting companies based in Slovakia29
- Critical infrastructure security consulting companies based in Cyprus27
- Critical infrastructure security consulting companies based in Uruguay27
- Critical infrastructure security consulting companies based in the Dominican Republic27
Cities
- Critical infrastructure security consulting companies based in London, United Kingdom558
- Critical infrastructure security consulting companies based in Paris, France272
- Critical infrastructure security consulting companies based in Sao Paulo, Brazil261
- Critical infrastructure security consulting companies based in Washington, United States193
- Critical infrastructure security consulting companies based in Dubai, United Arab Emirates191
- Critical infrastructure security consulting companies based in New York, United States173
- Critical infrastructure security consulting companies based in Toronto, Canada147
- Critical infrastructure security consulting companies based in Melbourne, Australia131
- Critical infrastructure security consulting companies based in Sydney, Australia130
- Critical infrastructure security consulting companies based in Houston, United States126
- Critical infrastructure security consulting companies based in Atlanta, United States115
- Critical infrastructure security consulting companies based in Singapore, Singapore97
- Critical infrastructure security consulting companies based in Madrid, Spain95
- Critical infrastructure security consulting companies based in Stockholm, Sweden93
- Critical infrastructure security consulting companies based in Austin, United States88
- Critical infrastructure security consulting companies based in Hyderabad, India87
- Critical infrastructure security consulting companies based in Mumbai, India87
- Critical infrastructure security consulting companies based in Riyadh, Saudi Arabia87
- Critical infrastructure security consulting companies based in Dallas, United States85
- Critical infrastructure security consulting companies based in Bogota, Colombia82
- Critical infrastructure security consulting companies based in Arlington, United States81
- Critical infrastructure security consulting companies based in Bangalore, India80
- Critical infrastructure security consulting companies based in Istanbul, Türkiye79
- Critical infrastructure security consulting companies based in Ottawa, Canada78
- Critical infrastructure security consulting companies based in Miami, United States77
- Critical infrastructure security consulting companies based in Chicago, United States73
- Critical infrastructure security consulting companies based in Los Angeles, United States72
- Critical infrastructure security consulting companies based in Montreal, Canada70
- Critical infrastructure security consulting companies based in New Delhi, India69
- Critical infrastructure security consulting companies based in Pune, India68
- Critical infrastructure security consulting companies based in Rio De Janeiro, Brazil68
- Critical infrastructure security consulting companies based in Nairobi, Kenya67
- Critical infrastructure security consulting companies based in Chennai, India66
- Critical infrastructure security consulting companies based in Tampa, United States62
- Critical infrastructure security consulting companies based in Brisbane, Australia61
- Critical infrastructure security consulting companies based in San Francisco, United States61
- Critical infrastructure security consulting companies based in Santiago, Chile61
- Critical infrastructure security consulting companies based in Alexandria, United States60
- Critical infrastructure security consulting companies based in Johannesburg, South Africa58
- Critical infrastructure security consulting companies based in Calgary, Canada57
- Critical infrastructure security consulting companies based in Mclean, United States57
- Critical infrastructure security consulting companies based in Bengaluru, India55
- Critical infrastructure security consulting companies based in Barcelona, Spain54
- Critical infrastructure security consulting companies based in Charlotte, United States53
- Critical infrastructure security consulting companies based in San Antonio, United States53
- Critical infrastructure security consulting companies based in Denver, United States52
- Critical infrastructure security consulting companies based in Canberra, Australia51
- Critical infrastructure security consulting companies based in San Diego, United States51
- Critical infrastructure security consulting companies based in Berlin, Germany50
- Critical infrastructure security consulting companies based in Vancouver, Canada50
- Critical infrastructure security consulting companies based in Boston, United States49
- Critical infrastructure security consulting companies based in Reston, United States49
- Critical infrastructure security consulting companies based in Ahmedabad, India47
- Critical infrastructure security consulting companies based in Noida, India46
- Critical infrastructure security consulting companies based in Columbia, United States45
- Critical infrastructure security consulting companies based in Seattle, United States45
- Critical infrastructure security consulting companies based in Ashburn, United States44
- Critical infrastructure security consulting companies based in Las Vegas, United States44
- Critical infrastructure security consulting companies based in Tel Aviv, Israel44
- Critical infrastructure security consulting companies based in Herndon, United States42
- Critical infrastructure security consulting companies based in Abu Dhabi, United Arab Emirates41
- Critical infrastructure security consulting companies based in Manchester, United Kingdom39
- Critical infrastructure security consulting companies based in Roma, Italy39
- Critical infrastructure security consulting companies based in Perth, Australia38
- Critical infrastructure security consulting companies based in Phoenix, United States38
- Critical infrastructure security consulting companies based in Warszawa, Poland38
- Critical infrastructure security consulting companies based in Brasilia, Brazil37
- Critical infrastructure security consulting companies based in Cairo, Egypt37
- Critical infrastructure security consulting companies based in Cape Town, South Africa37
- Critical infrastructure security consulting companies based in Huntsville, United States37
- Critical infrastructure security consulting companies based in Orlando, United States37
- Critical infrastructure security consulting companies based in Amsterdam, Netherlands36
- Critical infrastructure security consulting companies based in Zurich, Switzerland35
- Critical infrastructure security consulting companies based in Buenos Aires, Argentina34
- Critical infrastructure security consulting companies based in Fairfax, United States34
- Critical infrastructure security consulting companies based in Vienna, United States34
- Critical infrastructure security consulting companies based in Belo Horizonte, Brazil33
- Critical infrastructure security consulting companies based in Minneapolis, United States33
- Critical infrastructure security consulting companies based in Monterrey, Mexico33
- Critical infrastructure security consulting companies based in Raleigh, United States33
- Critical infrastructure security consulting companies based in Wellington, New Zealand33
- Critical infrastructure security consulting companies based in Colorado Springs, United States31
- Critical infrastructure security consulting companies based in Milano, Italy31
- Critical infrastructure security consulting companies based in Rome, Italy31
- Critical infrastructure security consulting companies based in Baltimore, United States30
- Critical infrastructure security consulting companies based in Gurgaon, India30
- Critical infrastructure security consulting companies based in Richmond, United States30
- Critical infrastructure security consulting companies based in Doha, Qatar29
- Critical infrastructure security consulting companies based in Quito, Ecuador29
- Critical infrastructure security consulting companies based in Bethesda, United States28
- Critical infrastructure security consulting companies based in Curitiba, Brazil28
- Critical infrastructure security consulting companies based in Lyon, France28
- Critical infrastructure security consulting companies based in Munich, Germany28
- Critical infrastructure security consulting companies based in Columbus, United States27
- Critical infrastructure security consulting companies based in Gurugram, India27
- Critical infrastructure security consulting companies based in Scottsdale, United States27
- Critical infrastructure security consulting companies based in Jakarta, Indonesia25
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 consulting 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 security consulting companies are there worldwide?
RevenueBase identified 23,398 critical infrastructure security consulting companies 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?
Guidehouse, headquartered in Mclean, tops this list with the largest team on record.
Which country has the most critical infrastructure security consulting companies?
The United States leads with 6,159 companies, followed by the United Kingdom (1,491) and India (1,119). Every critical infrastructure security consulting companies list by country and city is linked on this page.
Which city has the most critical infrastructure security consulting companies?
London leads with 566 headquartered companies, followed by Paris (272) and Sao Paulo (261).
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 89,391 verified decision-maker contacts tracked across these 23,398 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.
Ready to reach these companies? Verified emails and direct dials for all 23,398 critical infrastructure security consulting companies worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.