Company lists · Data refreshed September 2026
Top 25 Physical security consulting firms based in New York, United States
RevenueBase identified 88 physical security consulting firms headquartered in New York, United States as of September 2026 and tracks 3,331 professional contacts across them, including 385 with verified work emails. New York is the largest hub.
This list covers physical security consulting firms headquartered in New York, 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 5, 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.
The 25 largest physical security consulting firms based in New York, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,375 | ||||
“Guardsmark, LLC provides security services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 216 | ||||
“T&M USA provides seamlessly integrated executive protection, investigative and consulting services.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 206 | ||||
“Since 1969, thousands of businesses across the country have entrusted their protection to DGA Security.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | SilversealPartial evidence | 159 | |||
“Silverseal is a comprehensive security solutions firm with worldwide affiliations that can provide global security services in a highly professional manner.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 120 | ||||
“Excel Security Corp.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 82 | ||||
“AJ Squared Security, Inc.(AJ2), is a privately owned security organization founded in May 2003 and incorporated in November 2003.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 82 | ||||
“For over 30 years GMSC has been securing high profile buildings and offices across New York and Chicago.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 72 | ||||
“ADR Security is the leading provider of electronic and physical security services to some of New York's largest residential real estate portfolios.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 70 | ||||
“At GLOBAL OPS, we specialize in creating and implementing tailored security solutions that cater to the unique needs of our diverse clientele.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 68 | ||||
“At CITY SAFE PARTNERS SECURITY, we create solutions and put systems in place to ensure that people and businesses are secure.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 63 | ||||
“Effective risk management requires a holistic process.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 60 | ||||
“A&H Security Services, is a certified NYC MBE security services provider who makes a difference in our community.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 36 | ||||
“SECURITY.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 23 | ||||
“Target Security Systems, LLC is New York City’s leading provider of cutting edge, high security solutions customized for today’s business and private sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | SI Global PartnersStrong evidence | 22 | |||
“SI Global Partners is an independent global investigation and security consulting firm founded in 2021.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 21 | ||||
“Gotham Digital Science (GDS) was acquired in 2016 by Stroz Friedberg, an Aon company.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 18 | ||||
“We help busy organizations provide maximum security with simple but sophisticated solutions which enable them to have everything under control.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | Narrowgate Security AgencyStrong evidence | 18 | |||
“We provide analysis and design of Physical Security Systems (PSS) of high risk facilities and critical infrastructure.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | SpherenyPartial evidence | 14 | |||
“SphereNY is made up of seasoned professionals who have a passion for the Construction Industry and Security Awareness programs for all sectors.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | Robert Derector Mission CriticalPartial evidence | 13 | |||
“The RDA Mission Critical Group (RDMC) is a team of professional design and consulting experts in the fields of Electrical, Mechanical, Fire Protection, Telecommunications and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | Roundtable Solutions SecurityIndirect evidence | 10 | |||
“Founded in New York City in 1991, Roundtable Solutions has developed a reputation for providing clients with exceptional service, commensurate with risk, and therefore the perfect…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | Stone Security EngineeringPartial evidence | 9 | |||
“Stone Security Engineering specializes in reducing risk through the application of knowledge and expertise in blast resistance and anti-terrorism design.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 6 | ||||
“Professional Security Contractors in Commercial and Residential Smart Home Automation, IP Cameras, Access Control, Network, Voice & Data” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 5 | ||||
“At Armored Doors, our team is committed to providing high-caliber security doors, windows, and safe rooms that align seamlessly with original designs and architectural plans.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | Rigid SecurityPartial evidence | 5 | |||
“Rigid Security is a New York-based security systems company specializing in professional-grade solutions for businesses, nonprofits, and government organizations.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 88 physical security consulting firms based in New York, United States
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Physical security consulting firms based in New York, United States at a glance
As of Sep 5, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for New York, over 88 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 physical security consulting firms, 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 New York, United States whose own description of what they do matches “physical security consulting firms”. 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 physical security consulting firms, and records with no verified work email. Companies headquartered outside New York 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, 385 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 5, 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.
Physical security consulting firms by metro in the United States
- Physical security consulting firms in New York88
- Physical security consulting firms in Houston66
- Physical security consulting firms in Miami52
- Physical security consulting firms in Los Angeles51
- Physical security consulting firms in Atlanta48
- Physical security consulting firms in Austin43
- Physical security consulting firms in Chicago43
- Physical security consulting firms in Dallas39
- Physical security consulting firms in Charlotte29
- Physical security consulting firms in Washington29
- Physical security consulting firms in San Francisco26
- Physical security consulting firms in Tampa25
Frequently asked
How many physical security consulting firms are there based in New York, United States?
RevenueBase identified 88 physical security consulting firms headquartered in New York, 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?
Guardsmark, headquartered in New York, tops this list with the largest team on record.
Which city has the most physical security consulting firms?
New York leads with 88 headquartered companies, followed by Houston (66) and Miami (52).
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 385 verified decision-maker contacts tracked across these 88 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 5, 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.
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