Company lists · Data refreshed September 2026
Top 14 Security consultancies based in Baltimore, United States
RevenueBase identified 40 security consultancies headquartered in Baltimore, United States as of September 2026 and tracks 573 professional contacts across them, including 135 with verified work emails. New York is the largest hub.
This list covers security consultancies headquartered in Baltimore, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.
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 14 largest security consultancies based in Baltimore, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 56 contacts → | ||||
Partial evidence “As an industry leader in safety and security systems design, implementation, and maintenance, we bring the best in the business together for you.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 53 contacts → | ||||
Partial evidence “ICS is a locally-owned, private security company providing trustworthy, proactive, hands-on protection services to people and businesses in Maryland, Virginia, and Washington, DC.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 33 contacts → | ||||
Partial evidence “Companies come to ISE when they need to find and fix their security vulnerabilities and prove their tech is secure.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 24 contacts → | ||||
Partial evidence “Cyber security consulting firm providing consulting services to government and industry partners.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 22 contacts → | ||||
Indirect evidence “At VisioneerIT, we transform how organizations harness AI, automate operations, and protect their future.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 16 contacts → | ||||
Indirect evidence “A Cybersecurity Firm Focused on Mitigating Risk, Increasing Resilience, & Locking Down Organizational Data, while ensuring Regulatory Compliance.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 16 contacts → | ||||
Indirect evidence “AMS Technologies is a Minority Owned, SBA HUBZone approved, SDB cybersecurity firm with a powerful focus on network/software modeling, design & engineering.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 13 contacts → | ||||
Partial evidence “Agile Care Enterprises Technologies LLC is a premiere veteran's owned IT services and cybersecurity consultancy serving organizations committed to preserving our past, securing…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 13 contacts → | ||||
Partial evidence “Blueberry Security is a cybersecurity operations consulting business targeted at making cost-effective, or even free solutions for medium-enterprise size businesses.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 7 contacts → | ||||
Partial evidence “Theseus Professional Services, a veteran owned small business (VOSB), was formed in January and has been a leading provider of security consulting and engineering services as well…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 6 contacts → | ||||
Indirect evidence “At S3 Integration, L.L.C, we are proud to offer the power and experience of a large company with the agility, responsiveness, and personal attention of a small company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 6 contacts → | ||||
Indirect evidence “We provide comprehensive cybersecurity services designed to protect your business from the complex and evolving digital threat landscape.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 contacts → | ||||
Partial evidence “TCecure is a Maryland-based MBE/DBE/SBE cybersecurity and intelligence company, providing security architecture, engineering, assessment, training, and consulting services to…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Partial evidence “American Blackbird is a group of highly experienced senior electronic security professionals.” Source: RevenueBase Database · checked Sep 21, 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: security consultancies. 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 security consultancies.
- Partial evidence
- Its own public description names part of security consultancies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name security consultancies. 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 14 of 40 security consultancies based in Baltimore, United States
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Security consultancies based in Baltimore, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for Baltimore, so it is reported there. Company counts and contact totals on this page are exact for Baltimore, over 40 companies.
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 consultancies, 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.
- What qualifies
- Companies headquartered in Baltimore, United States whose own description of what they do matches “security consultancies”. 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 security consultancies), 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 security consultancies, and records with no verified work email. Companies headquartered outside Baltimore 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 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, 135 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 21, 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 consultancies by metro in the United States
- Security consultancies in New York255
- Security consultancies in Washington175
- Security consultancies in Houston155
- Security consultancies in Los Angeles130
- Security consultancies in Atlanta127
- Security consultancies in Miami123
- Security consultancies in Dallas122
- Security consultancies in Austin113
- Security consultancies in Chicago110
- Security consultancies in San Francisco86
- Security consultancies in Tampa77
- Security consultancies in Arlington71
- Security consultancies in Denver68
- Security consultancies in San Diego66
- Security consultancies in Boston62
- Security consultancies in Charlotte62
- Security consultancies in Seattle61
- Security consultancies in Orlando60
- Security consultancies in Las Vegas59
- Security consultancies in Phoenix54
- Security consultancies in San Antonio53
- Security consultancies in Alexandria48
- Security consultancies in Raleigh44
- Security consultancies in Baltimore40
- Security consultancies in Columbia40
- Security consultancies in Minneapolis38
- Security consultancies in Portland36
- Security consultancies in Mclean35
- Security consultancies in Philadelphia35
- Security consultancies in Colorado Springs33
- Security consultancies in Columbus32
- Security consultancies in Jacksonville32
- Security consultancies in Pittsburgh32
- Security consultancies in Scottsdale32
- Security consultancies in Ashburn31
- Security consultancies in Fort Lauderdale31
- Security consultancies in Nashville31
- Security consultancies in Reston31
- Security consultancies in Richmond30
- Security consultancies in San Jose30
- Security consultancies in Plano29
- Security consultancies in Wilmington29
- Security consultancies in Sheridan28
- Security consultancies in Huntsville27
- Security consultancies in Herndon25
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 security consultancies, 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 security consultancies are there based in Baltimore, United States?
RevenueBase identified 40 security consultancies headquartered in Baltimore, 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?
Sciens LS Systems Division, headquartered in Baltimore, tops this list with the largest team on record.
Which city has the most security consultancies?
New York leads with 255 headquartered companies, followed by Washington (175) and Houston (155).
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 135 verified decision-maker contacts tracked across these 40 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 21, 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.
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