Company lists · Data refreshed September 2026

Top 25 Security engineers based in the United States

RevenueBase identified 409 security engineers headquartered in the United States as of September 2026 and tracks 11,534 professional contacts across them, including 5,476 with verified work emails and 4,103 with mobile numbers. San Francisco is the largest hub.

This list covers security engineers 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.

How to read this list HQ checked on every row Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
409Companies
11,534Contacts tracked
5,476Verified emails
4,103Mobile numbers
Explore all 409 companies → Free signup · no credit card · 500 free credits

The 25 largest security engineers based in the United States

Ranked by team size
Top 25 of 409 security engineers based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names security engineers: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
ConvergintIndirect evidence
Hoffman Estates, IL, United StatesHQ checked Sep 6, 202610001+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, 2026
2
Synack RED TeamPartial evidence
Austin, TX, United StatesHQ checked Sep 6, 2026n/a813

“The Synack Red Team is a private freelance security research team that spans 6 continents and over 80 countries.”

Source: company website · checked Sep 6, 2026
3
Skyhigh SecurityPartial evidence
San Jose, CA, United StatesHQ checked Sep 6, 2026501-1,000640

“Skyhigh Security protects organizations with cloud-native security solutions that are both data-aware and simple to use.”

Source: company website · checked Sep 6, 2026
4
Bishop FOXPartial evidence
Tempe, AZ, United StatesHQ checked Sep 6, 2026201-500344

“Bishop Fox is recognized as the leading authority in offensive security, providing solutions ranging from continuous penetration testing, red teaming, and attack surface…”

Source: company website · checked Sep 6, 2026
5
SonitrolPartial evidence
Indianapolis, United StatesHQ checked Sep 6, 202610001+302

“Sonitrol is the industry leader in verified electronic security and provides customers with a single source of integrated security solutions for intrusion, video, access and fire.”

Source: company website · checked Sep 6, 2026
6Salt Lake City, UT, United StatesHQ checked Sep 6, 2026201-500202

“Stone Security has been driving the implementation of network-based surveillance, access control and intrusion systems for over 15 years.”

Source: company website · checked Sep 6, 2026
7
Austin Fire SystemsStrong evidence
Prairieville, LA, United StatesHQ checked Sep 6, 2026201-500129

“Locally owned and operated since Austin Fire Systems is your one source for engineering, installation, service and inspection of fire detection, fire suppression, security and…”

Source: company website · checked Sep 6, 2026
8
Hunter StrategyPartial evidence
Pompano Beach, DC, United StatesHQ checked Sep 6, 202651-200100

“Cybersecurity and software engineering SMEs that help Government and Commercial customers build secure scalable solutions.”

Source: company website · checked Sep 6, 2026
9
NeoveraIndirect evidence
Reston, VA, United StatesHQ checked Sep 6, 202651-20098

“Neovera helps financial institutions and regulated organizations protect how value moves across money, data, identities, applications, and infrastructure.”

Source: company website · checked Sep 6, 2026
10
Nexum, INCIndirect evidence
Hammond, IN, United StatesHQ checked Sep 6, 202651-20078

“Founded in Chicago in 2002, Nexum, Inc.”

Source: company website · checked Sep 6, 2026
11Dulles, VA, United StatesHQ checked Sep 6, 202611-5061

“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: company website · checked Sep 6, 2026
12Columbia, MD, United StatesHQ checked Sep 6, 202651-20057

“We operate at the intersection of network engineering and cybersecurity, providing secure, scalable, and high-performing architectures for our customers.”

Source: company website · checked Sep 6, 2026
13
Opal SecurityStrong evidence
San Francisco, CA, United StatesHQ checked Sep 6, 202611-5057

“The best security and engineering teams use Opal, the AI-native access security platform, for real-time visibility, expressive policy-as-code, and direct control over every…”

Source: company website · checked Sep 6, 2026
14
Dune SecurityStrong evidence
New York, NY, United StatesHQ checked Sep 6, 202651-20053

“Dune Security prevents social engineering and insider threats across every channel.”

Source: company website · checked Sep 6, 2026
15
Ebryx LLCPartial evidence
Salem, NH, United StatesHQ checked Sep 6, 2026201-50048

“Ebryx LLC is a 360° cybersecurity and secure engineering company trusted by enterprises, startups, and governments to safeguard critical digital ecosystems.”

Source: company website · checked Sep 6, 2026
16
State Security & FirePartial evidence
Westerville, OH, United StatesHQ checked Sep 6, 202611-5047

“State Security & Fire is a Columbus-based commercial security and fire life safety integration company serving Central Ohio businesses, institutions, and properties since 2009.”

Source: company website · checked Sep 6, 2026
17
Secure Ideas, LLCIndirect evidence
Jacksonville, FL, United StatesHQ checked Sep 6, 202611-5044

“Founded in 2010, Secure Ideas is a small-business consulting firm.”

Source: company website · checked Sep 6, 2026
18
EOA Technologies, LLCPartial evidence
Medina, TX, United StatesHQ checked Sep 6, 202651-20041

“As an IT engineering, cyber engineering, cabling and consulting firm, EOA Technologies, LLC, provides an extensive range of services.”

Source: company website · checked Sep 6, 2026
19
PlugoutPartial evidence
Englewood, NJ, United StatesHQ checked Sep 6, 2026201-50041

“Since 2003, Plugout has specialized in advanced security applications and professional services.”

Source: company website · checked Sep 6, 2026
20
ZellicPartial evidence
United StatesHQ checked Sep 6, 202651-20040

“Zellic specializes in securing emerging technologies.”

Source: company website · checked Sep 6, 2026
21
Kyrus TechPartial evidence
Sterling, VA, United StatesHQ checked Sep 6, 202611-5040

“Kyrus is a security innovation company solving the world's hardest computer security problems.”

Source: company website · checked Sep 6, 2026
22
Anvil SecurePartial evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-5039

“Anvil is an information security consulting firm focused on top tier consulting.”

Source: company website · checked Sep 6, 2026
23
SAF Technologies, LLCIndirect evidence
Indian Trail, NC, United StatesHQ checked Sep 6, 202611-5036

“SAF Technologies, Inc.”

Source: company website · checked Sep 6, 2026
24
Cyberpoint InternationalIndirect evidence
Columbia, MD, United StatesHQ checked Sep 6, 202651-20034

“CyberPoint is dedicated to advancing the discipline of cybersecurity through imagination, technical excellence, and an unparalleled passion for our work.”

Source: company website · checked Sep 6, 2026
25Baltimore, MD, United StatesHQ checked Sep 6, 202611-5033

“Companies come to ISE when they need to find and fix their security vulnerabilities and prove their tech is secure.”

Source: company website · checked Sep 6, 2026

Showing 25 of 409 security engineers based in the United States

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Security engineers based in the United States at a glance

As of Sep 6, 2026
1-10Median size (employees)
San FranciscoLargest hub · 19 HQs
4,103Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
214
11-50
149
51-200
36
201-500
7
501-1,000
1
10001+
2

Verified emails by last verification

0–30
5,019
31–60
392
61–90
1
90–180
2
180+
62

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 engineers, 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 engineers”. 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 engineers, 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, 5,476 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.

Frequently asked

How many security engineers are there based in the United States?

RevenueBase identified 409 security engineers 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?

Convergint, headquartered in Hoffman Estates, tops this list with the largest team on record.

Which city has the most security engineers?

San Francisco leads with 19 headquartered companies, followed by Seattle (12) and Austin (11).

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 5,476 verified decision-maker contacts tracked across these 409 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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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.