Company lists · Data refreshed September 2026

Top 25 Facility access consulting firms based in the United States

Name: Facility access consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,380 companies tracked

RevenueBase identified 1,380 facility access consulting firms headquartered in the United States as of September 2026 and tracks 21,376 professional contacts across them, including 6,813 with verified work emails. New York is the largest hub.

This list covers facility access consulting firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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.

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

1,380Companies

21,376Contacts tracked

6,813Verified emails

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The 25 largest facility access consulting firms based in the United States

Ranked by team size

Top 25 of 1,380 facility access consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to facility access consulting firms: 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	Automated Systems Design, INC	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 28, 2026	n/a	2,678 contacts →
	Indirect evidence “Since 1987, Automated Systems Design, Inc.(ASD®) a five-time Inc.” Source: RevenueBase Database · checked Sep 28, 2026
2	Titan Security Group	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,138 contacts →
	Indirect evidence “At Titan Security Group, we understand that each client is unique, with specific security needs shaped by the type of property and its location.” Source: RevenueBase Database · checked Sep 28, 2026
3	Security 101	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 28, 2026	501-1,000	849 contacts →
	Indirect evidence “Security 101® is a nationwide leader in designing, installing, and maintaining advanced security systems tailored to the unique needs of organizations of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026
4	Assa Abloy Door Security Solutions - US	Indirect evidence	New Haven, CT, United StatesHQ checked Sep 28, 2026	5,001-10,000	736 contacts →
	Indirect evidence “Combining the expertise of the industry’s most knowledgeable door opening experts with a comprehensive product offering of leading door and hardware brands, the consultative…” Source: RevenueBase Database · checked Sep 28, 2026
5	The Cook & Boardman Group, LLC	Indirect evidence	Winston-Salem, NC, United StatesHQ checked Sep 28, 2026	1,001-5,000	445 contacts →
	Indirect evidence “Established in 1955, The Cook & Boardman Group is the nation’s premier provider of architectural doors and frames, door hardware and related building specialty products in…” Source: RevenueBase Database · checked Sep 28, 2026
6	AFA Protective Systems, INC	Indirect evidence	Syosset, NY, United StatesHQ checked Sep 28, 2026	201-500	302 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
7	Wittenbach	Indirect evidence	Sparks, MD, United StatesHQ checked Sep 28, 2026	201-500	244 contacts →
	Indirect evidence “For over 50 years, Wittenbach has been a trusted leader in advanced security solutions in financial and commercial industries.” Source: RevenueBase Database · checked Sep 28, 2026
8	NAVCO	Indirect evidence	Orange, CA, United StatesHQ checked Sep 28, 2026	51-200	232 contacts →
	Indirect evidence “One of the largest privately held national electronic security system integrator in the USA, NAVCO keeps you one step ahead of ever-changing technology.” Source: RevenueBase Database · checked Sep 28, 2026
9	Shen Milsom & Wilke Sm&w	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	221 contacts →
	Partial evidence “Shen Milsom & Wilke (SM & W) is a global consulting and design firm specializing in acoustics, audiovisual and multimedia systems, information technology, physical security, and…” Source: RevenueBase Database · checked Sep 28, 2026
10	Datawatch Systems	Partial evidence	Bethesda, MD, United StatesHQ checked Sep 28, 2026	201-500	206 contacts →
	Partial evidence “An industry leader in managed access control security solutions and services since 1981, Datawatch Systems is trusted by building owners, property managers, and tenants across the…” Source: RevenueBase Database · checked Sep 28, 2026
11	Convergint Technologies	Partial evidence	Atlanta, United StatesHQ checked Sep 28, 2026	5,001-10,000	202 contacts →
	Partial evidence “Electronic Security Integrator Access Control Closed Circuit Television Intercom” Source: RevenueBase Database · checked Sep 28, 2026
12	The Falcon Group	Indirect evidence	Warren, NJ, United StatesHQ checked Sep 28, 2026	51-200	182 contacts →
	Indirect evidence “At The Falcon Group, our team of experienced professionals comes together to provide a wide range of services to meet all of our clients’ specific needs.” Source: RevenueBase Database · checked Sep 28, 2026
13	Amag Technology	Partial evidence	Hawthorne, CA, United StatesHQ checked Sep 28, 2026	201-500	177 contacts →
	Partial evidence “AMAG Technology is a market leader in Physical Access Control, Identity Management and integrated security solutions.” Source: RevenueBase Database · checked Sep 28, 2026
14	Aegis Protective Services	Indirect evidence	Cincinnati, OH, United StatesHQ checked Sep 28, 2026	201-500	165 contacts →
	Indirect evidence “Security Guard and Technology Services.” Source: RevenueBase Database · checked Sep 28, 2026
15	Boon Edam USA	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 28, 2026	501-1,000	159 contacts →
	Indirect evidence “Boon Edam is a global market leader in Secured Entry solutions and Revolving Doors.” Source: RevenueBase Database · checked Sep 28, 2026
16	OLD Account	Indirect evidence	Hammond, LA, United StatesHQ checked Sep 28, 2026	n/a	156 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
17	Grumman Butkus Associates	Partial evidence	Evanston, IL, United StatesHQ checked Sep 28, 2026	51-200	153 contacts →
	Partial evidence “Grumman\|Butkus Associates (GBA) is a nationally recognized consulting engineering firm that specializes in mechanical, electrical and plumbing design services and energy and…” Source: RevenueBase Database · checked Sep 28, 2026
18	VTI Security	Indirect evidence	Burnsville, MN, United StatesHQ checked Sep 28, 2026	1,001-5,000	143 contacts →
	Indirect evidence “For almost 40 years, VTI has been called upon and recognized by our industry for a full range of advanced physical security technologies.” Source: RevenueBase Database · checked Sep 28, 2026
19	Priebe Security Services, INC	Indirect evidence	Austin, United StatesHQ checked Sep 28, 2026	201-500	138 contacts →
	Indirect evidence “Priebe Security Services, known and respected for nearly two decades, has been providing personalized, client centric professional security services for most of Austin’s most…” Source: RevenueBase Database · checked Sep 28, 2026
20	MCE	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	51-200	130 contacts →
	Partial evidence “Michaud Cooley Erickson was founded in 1946 and is one of the largest mechanical and electrical consulting engineering firms in the United States with licensed professionals in…” Source: RevenueBase Database · checked Sep 28, 2026
21	Vanguard Fire & Security Systems, INC	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 28, 2026	51-200	121 contacts →
	Indirect evidence “Vanguard Fire & Security Systems, is a full service fire protection, life safety and security systems contractor with over fifty years experience in protecting people, property…” Source: RevenueBase Database · checked Sep 28, 2026
22	The Flying Locksmiths	Indirect evidence	Quincy, MA, United StatesHQ checked Sep 28, 2026	51-200	119 contacts →
	Indirect evidence “The Flying Locksmiths Inc, is an all-inclusive security provider, who are quickly becoming the largest National Commercial Locksmith.” Source: RevenueBase Database · checked Sep 28, 2026
23	ATIS	Partial evidence	St Louis, MO, United StatesHQ checked Sep 28, 2026	201-500	111 contacts →
	Partial evidence “ATIS is the leading elevator and escalator inspection, managed services, and consulting firm in the U.S, providing nationwide support to building owners, property managers, and…” Source: RevenueBase Database · checked Sep 28, 2026
24	Guardian Access Solutions	Partial evidence	Nashville-davidson, TN, United StatesHQ checked Sep 28, 2026	201-500	108 contacts →
	Partial evidence “Guardian Access Solutions was founded in 1987 with a focus on automated gates and parking and parking revenue control systems.” Source: RevenueBase Database · checked Sep 28, 2026
25	Kendell	Indirect evidence	Mendota Heights, MN, United StatesHQ checked Sep 28, 2026	201-500	106 contacts →
	Indirect evidence “With a century of expertise and an unwavering commitment to quality, KENDELL is a trusted leader in building opening solutions – including commercial doors & hardware, security…” 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: facility access consulting firms. 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 facility access consulting firms.
Partial evidence: Its own public description names part of facility access consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name facility access consulting firms. 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 1,380 facility access consulting firms based in the United States

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Facility access consulting firms based in the United States at a glance

As of Sep 28, 2026

31.9%Verified-email coverage

15.5Average contacts per company

1-10Median size (employees)

2.8%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

699

11-50

513

51-200

127

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,380 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 facility access consulting firms, 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 the United States whose own description of what they do matches “facility access consulting firms”. 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 facility access consulting firms), 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 facility access consulting firms, 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 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, 6,813 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.

Facility access consulting firms by metro

Facility access consulting firms in New York38

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 facility access consulting firms, 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 facility access consulting firms are there based in the United States?

RevenueBase identified 1,380 facility access consulting firms 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?

Automated Systems Design, INC, headquartered in Alpharetta, tops this list with the largest team on record.

Which city has the most facility access consulting firms?

New York leads with 38 headquartered companies, followed by Houston (24) and Dallas (20).

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 6,813 verified decision-maker contacts tracked across these 1,380 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.