Company lists · Data refreshed September 2026

Top 25 Cybersecurity engineers for hire worldwide

Name: Cybersecurity engineers for hire worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,915 companies tracked

RevenueBase identified 1,915 cybersecurity engineers for hire worldwide as of September 2026 and tracks 17,280 professional contacts across them, including 4,095 with verified work emails. The United States is the largest market and London the largest hub.

This list covers cybersecurity engineers for hire 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 28, 2026. Country and city lists for cybersecurity engineers for hire 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

1,915Companies

17,280Contacts tracked

4,095Verified emails

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The 25 largest cybersecurity engineers for hire worldwide

Ranked by team size

Top 25 of 1,915 cybersecurity engineers for hire worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity engineers for hire: 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	Bugcrowd	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	n/a	3,649 contacts →
	Indirect evidence “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Source: RevenueBase Database · checked Sep 28, 2026
2	Securityhq	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Strong evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 28, 2026
3	Ebryx Pvt. LTD	Strong evidence	Lahore, PakistanHQ checked Sep 28, 2026	201-500	300 contacts →
	Strong evidence “With over a decade of experience in providing cybersecurity consulting, Managed Security Service Provider (MSSP) operations, and custom engineering services, Ebryx serves multiple…” Source: RevenueBase Database · checked Sep 28, 2026
4	Netdata Cybersecurity	Strong evidence	Bogotá, ColombiaHQ checked Sep 28, 2026	201-500	210 contacts →
	Strong evidence “Netdata is a leading global cybersecurity services partner with more than 200 certified engineers and over 1,500 certifications, widely recognized as a partner of Palo Alto…” Source: RevenueBase Database · checked Sep 28, 2026
5	Census	Strong evidence	Athens, GreeceHQ checked Sep 28, 2026	51-200	194 contacts →
	Strong evidence “CENSUS is a cybersecurity engineering powerhouse.” Source: RevenueBase Database · checked Sep 28, 2026
6	Reversec	Indirect evidence	Sweden, ItalyHQ checked Sep 28, 2026	201-500	177 contacts →
	Indirect evidence “We are Reversec.” Source: RevenueBase Database · checked Sep 28, 2026
7	Synacktiv	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	201-500	171 contacts →
	Indirect evidence “Synacktiv is an offensive security company founded in 2012 by several security experts.” Source: RevenueBase Database · checked Sep 28, 2026
8	Stratascale	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 28, 2026	201-500	171 contacts →
	Partial evidence “Stratascale is a premier services company proudly operating as the cybersecurity division of SHI.” Source: RevenueBase Database · checked Sep 28, 2026
9	Evolve Security Academy	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	n/a	166 contacts →
	Partial evidence “Evolve Security is a technical cybersecurity firm and the home of Evolve Academy, offering holistic and advanced cybersecurity training and continuously ranked #1 in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
10	Synersys Technologies INC	Indirect evidence	Cedar Park, TX, United StatesHQ checked Sep 28, 2026	201-500	143 contacts →
	Indirect evidence “At Synersys Technologies, we help small and mid-sized enterprises build secure, scalable, and high-performance technology environments.” Source: RevenueBase Database · checked Sep 28, 2026
11	Tarlogic	Partial evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	123 contacts →
	Partial evidence “Tarlogic is an international company that specializes in cyber intelligence and cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
12	Sealing Technologies, A Parsons Company	Partial evidence	Columbia, MD, United StatesHQ checked Sep 28, 2026	51-200	119 contacts →
	Partial evidence “SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Source: RevenueBase Database · checked Sep 28, 2026
13	Adapt Forward	Partial evidence	North Charleston, SC, United StatesHQ checked Sep 28, 2026	51-200	113 contacts →
	Partial evidence “Adapt Forward helps government agencies outpace adversaries through proven Cybersecurity Service Provider (CSSP) operations, mission-focused innovation, and a people first culture…” Source: RevenueBase Database · checked Sep 28, 2026
14	Adeo Cyber Security	Partial evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	51-200	113 contacts →
	Partial evidence “ADEO Cyber Security is a trusted cybersecurity partner enabling organizations to build resilient, proactive, and continuous cyber defense capabilities.” Source: RevenueBase Database · checked Sep 28, 2026
15	Ioactive, INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	107 contacts →
	Indirect evidence “IOActive is a trusted partner for Global enterprises, providing research-fueled security services across all industries.” Source: RevenueBase Database · checked Sep 28, 2026
16	Lumiverse Solutions	Partial evidence	Zayed City, United Arab EmiratesHQ checked Sep 28, 2026	51-200	103 contacts →
	Partial evidence “Lumiverse Solutions Pvt Ltd is a leading cybersecurity services company that offers comprehensive and cutting-edge solutions to businesses of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026
17	Trustedsec	Indirect evidence	Fairlawn, OH, United StatesHQ checked Sep 28, 2026	51-200	102 contacts →
	Indirect evidence “TrustedSec is an end-to-end security consulting company that provides customized services to build client-defined success.” Source: RevenueBase Database · checked Sep 28, 2026
18	Hunter Strategy	Strong evidence	Pompano Beach, DC, United StatesHQ checked Sep 28, 2026	51-200	100 contacts →
	Strong evidence “Cybersecurity and software engineering SMEs that help Government and Commercial customers build secure scalable solutions.” Source: RevenueBase Database · checked Sep 28, 2026
19	Scybers	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	51-200	89 contacts →
	Partial evidence “Scybers is a pure-play global cybersecurity firm.” Source: RevenueBase Database · checked Sep 28, 2026
20	Privia Security	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	51-200	81 contacts →
	Indirect evidence “Privia Security, which plans to bring a different perspective to security and privacy concepts by acting with the slogan of “Privacy For You” in the field of cyber security, took…” Source: RevenueBase Database · checked Sep 28, 2026
21	Techguard Security	Partial evidence	O'fallon, IL, United StatesHQ checked Sep 28, 2026	51-200	80 contacts →
	Partial evidence “Our Cybersecurity Specialists are highly educated and certified professionals who have utilized their extensive IT security experience to support both Fortune 500 businesses and…” Source: RevenueBase Database · checked Sep 28, 2026
22	Ditis Systeme	Indirect evidence	Ulm, GermanyHQ checked Sep 28, 2026	51-200	69 contacts →
	Indirect evidence “ditis - The Security Company!” Source: RevenueBase Database · checked Sep 28, 2026
23	Cyber Defense Technologies	Indirect evidence	Dulles, VA, United StatesHQ checked Sep 28, 2026	11-50	61 contacts →
	Indirect evidence “We specialize in providing comprehensive cyber security solutions by leveraging our information security background in the GovCon and military experiences to serve the federal…” Source: RevenueBase Database · checked Sep 28, 2026
24	Seclab Indonesia	Partial evidence	Jakarta Selatan, IndonesiaHQ checked Sep 28, 2026	51-200	60 contacts →
	Partial evidence “Seclab Indonesia is cyber security consulting company that primarily focus on specialized penetration testing, reverse engineering and human development.” Source: RevenueBase Database · checked Sep 28, 2026
25	Def-Logix, INC	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 28, 2026	51-200	58 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 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: cybersecurity engineers for hire. 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 cybersecurity engineers for hire.
Partial evidence: Its own public description names part of cybersecurity engineers for hire, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity engineers for hire. 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 1,915 cybersecurity engineers for hire worldwide

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Cybersecurity engineers for hire worldwide at a glance

As of Sep 28, 2026

23.7%Verified-email coverage

9.0Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,220

11-50

560

51-200

104

201-500

501-1,000

10001+

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 cybersecurity engineers for hire, 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 cybersecurity engineers for hire are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “cybersecurity engineers for hire”. 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 cybersecurity engineers for hire), 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 cybersecurity engineers for hire, 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, 4,095 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 28, 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.

Cybersecurity engineers for hire by location

11 lists · largest first

Every Cybersecurity engineers for hire list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Cybersecurity engineers for hire based in London, United Kingdom60

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 cybersecurity engineers for hire, 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 cybersecurity engineers for hire are there worldwide?

RevenueBase identified 1,915 cybersecurity engineers for hire 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?

Bugcrowd, headquartered in San Francisco, tops this list with the largest team on record.

Which country has the most cybersecurity engineers for hire?

The United States leads with 446 companies, followed by India (181) and the United Kingdom (119). Every cybersecurity engineers for hire list by country and city is linked on this page.

Which city has the most cybersecurity engineers for hire?

London leads with 60 headquartered companies, followed by Paris (24) and Sao Paulo (17).

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 4,095 verified decision-maker contacts tracked across these 1,915 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 28, 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.