Company lists · Data refreshed September 2026

Top 25 Government contract security companies based in the United States

Name: Government contract security companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 1,078 companies tracked

RevenueBase identified 1,078 government contract security companies headquartered in the United States as of September 2026 and tracks 83,245 professional contacts across them, including 5,004 with verified work emails and 23,199 with mobile numbers. New York is the largest hub.

This list covers government contract security companies 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 3, 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 3, 2026 86% judged on-target in blind review

1,078Companies

83,245Contacts tracked

5,004Verified emails

23,199Mobile numbers

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The 25 largest government contract security companies based in the United States

Ranked by team size

Top 25 of 1,078 government contract security companies based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to government contract security companies: 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	Securitas Security Services Usa, INC	Partial evidence	Parsippany, ID, United StatesHQ checked Sep 3, 2026	10001+	38,650 contacts →
	Partial evidence “Securitas knows Security.” Source: RevenueBase Database · checked Sep 3, 2026
2	Paragon Systems INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 3, 2026	10001+	1,946 contacts →
	Partial evidence “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: RevenueBase Database · checked Sep 3, 2026
3	DSI Security Services	Partial evidence	Dothan, AL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,186 contacts →
	Partial evidence “DSI Security Services offers armed and unarmed uniformed security guard services.” Source: RevenueBase Database · checked Sep 3, 2026
4	SOS Security LLC	Partial evidence	Parsippany, CA, United StatesHQ checked Sep 3, 2026	10001+	1,148 contacts →
	Partial evidence “SOS Security is a known innovator and leader in the security and protective services industry.” Source: RevenueBase Database · checked Sep 3, 2026
5	Titan Security Group	Partial evidence	Chicago, IL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,133 contacts →
	Partial 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 3, 2026
6	Securitas Critical Infrastructure Services, INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 3, 2026	10001+	1,113 contacts →
	Partial evidence “Securitas Critical Infrastructure Services, Inc.(SCIS) is a provider of specialized security and fire services to the highly regulated Nuclear, Aerospace, Defense, Energy, and…” Source: RevenueBase Database · checked Sep 3, 2026
7	Northeast Security INC	Partial evidence	Westwood, MA, United StatesHQ checked Sep 3, 2026	1,001-5,000	744 contacts →
	Partial evidence “Improving Security.” Source: RevenueBase Database · checked Sep 3, 2026
8	Akal Security	Indirect evidence	Espanola, NM, United StatesHQ checked Sep 3, 2026	10001+	741 contacts →
	Indirect evidence “Known for our responsiveness, innovation, and customer-focused service, Akal provides officers and specialized training to a broad range of clients.” Source: RevenueBase Database · checked Sep 3, 2026
9	Champion National Security	Indirect evidence	Richardson, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	515 contacts →
	Indirect evidence “COMMITTED PEOPLE.” Source: RevenueBase Database · checked Sep 3, 2026
10	Ranger American	Partial evidence	San Juan, United StatesHQ checked Sep 3, 2026	1,001-5,000	511 contacts →
	Partial evidence “Founded in 1982, Ranger American is a professional security organization with an extensive background in the security and investigation fields.” Source: RevenueBase Database · checked Sep 3, 2026
11	Imperial Security	Strong evidence	Memphis, TN, United StatesHQ checked Sep 3, 2026	1,001-5,000	452 contacts →
	Strong evidence “Founded in Memphis, Tennessee, in 1968, Imperial Security is one of the largest and fastest growing contract security providers in the United States.” Source: RevenueBase Database · checked Sep 3, 2026
12	American Security & Investigations	Partial evidence	St. Paul, NE, United StatesHQ checked Sep 3, 2026	1,001-5,000	404 contacts →
	Partial evidence “American Security & Investigations has provided security and investigative services throughout the upper midwest since 1959.” Source: RevenueBase Database · checked Sep 3, 2026
13	Iidon Security Associates	Partial evidence	Dallas, TX, United StatesHQ checked Sep 3, 2026	501-1,000	340 contacts →
	Partial evidence “iidon Security Associates provides premier security services catered to your company's needs.” Source: RevenueBase Database · checked Sep 3, 2026
14	United American Security, LLC UAS	Partial evidence	Raleigh, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	322 contacts →
	Partial evidence “United American Security was formed in 2010 to bring excellent regional security companies together.” Source: RevenueBase Database · checked Sep 3, 2026
15	Doyle Security Services, Inc. DSS	Partial evidence	Rockville Centre, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	273 contacts →
	Partial evidence “Welcome to Doyle Security Services (DSS) where a team of responsive security professionals stands ready to meet your needs in this ever-changing business environment.” Source: RevenueBase Database · checked Sep 3, 2026
16	ADC LTD NM	Strong evidence	Albuquerque, NM, United StatesHQ checked Sep 3, 2026	501-1,000	253 contacts →
	Strong evidence “ADC supports government and corporate clients with two primary services - personnel security, ranging from pre-employment checks to comprehensive background investigations and…” Source: RevenueBase Database · checked Sep 3, 2026
17	Guardtexas, INC	Partial evidence	Richardson, TX, United StatesHQ checked Sep 3, 2026	501-1,000	238 contacts →
	Partial evidence “GuardTexas is a Texas-owned security services provider delivering professional, dependable protection since 1976.” Source: RevenueBase Database · checked Sep 3, 2026
18	Acts-Aviation Security	Indirect evidence	Des Plaines, IL, United StatesHQ checked Sep 3, 2026	1,001-5,000	203 contacts →
	Indirect evidence “As the U.S.” Source: RevenueBase Database · checked Sep 3, 2026
19	Pacwest Security Services	Partial evidence	Costa Mesa, CA, United StatesHQ checked Sep 3, 2026	501-1,000	200 contacts →
	Partial evidence “We are a privately owned California security services provider who is committed to excellence in service in every aspect of our business.” Source: RevenueBase Database · checked Sep 3, 2026
20	TOP Guard INC	Partial evidence	Hampton, VA, United StatesHQ checked Sep 3, 2026	501-1,000	190 contacts →
	Partial evidence “Top Guard Security provides uniformed unarmed and armed private security officer services and believes in a balanced approach to private security services management.” Source: RevenueBase Database · checked Sep 3, 2026
21	Maxsent	Strong evidence	Annapolis, MD, United StatesHQ checked Sep 3, 2026	1,001-5,000	183 contacts →
	Strong evidence “Privately held American owned company that provides professionally trained armed/unarmed security officers to the federal government, municipalities,commercial clients, utility…” Source: RevenueBase Database · checked Sep 3, 2026
22	Titan Protection And Consulting, INC	Partial evidence	Overland Park, MO, United StatesHQ checked Sep 3, 2026	501-1,000	173 contacts →
	Partial evidence “Established in 2008, Titan Protection and Consulting is a leading-edge security firm specializing in crime prevention and detection for hundreds of companies nationwide.” Source: RevenueBase Database · checked Sep 3, 2026
23	American Security Programs	Strong evidence	Reston, VA, United StatesHQ checked Sep 3, 2026	1,001-5,000	173 contacts →
	Strong evidence “ASP is a premium contract security services company based in Northern Virginia and a wholly owned subsidiary of SecurAmerica.” Source: RevenueBase Database · checked Sep 3, 2026
24	Teachout Security Solutions, INC	Partial evidence	Flint, MI, United StatesHQ checked Sep 3, 2026	501-1,000	170 contacts →
	Partial evidence “Since 1981, Teachout Security Solutions has become well-known as industry-leading uniformed security services.” Source: RevenueBase Database · checked Sep 3, 2026
25	Diversified Protection Corporation	Partial evidence	Daniel Island, VA, United StatesHQ checked Sep 3, 2026	501-1,000	160 contacts →
	Partial evidence “In a eld that is highly competitive, Diversified Protection Corporation (DPC) is a spirited company effectively providing superior security services to federal and commercial…” Source: RevenueBase Database · checked Sep 3, 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: government contract security companies. 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 government contract security companies.
Partial evidence: Its own public description names part of government contract security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government contract security companies. 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 1,078 government contract security companies based in the United States

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Government contract security companies based in the United States at a glance

As of Sep 3, 2026

6.0%Verified-email coverage

27.9%Mobile-number coverage

77.2Average contacts per company

11-50Median size (employees)

3.3%Largest-city concentration · New York

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

248

11-50

342

51-200

264

201-500

103

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

40131–60

2,82861–90

1,63590–180

140180+

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 government contract security companies, 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 “government contract security companies”. 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 government contract security companies), 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 government contract security companies, 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, 5,004 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 3, 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

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 government contract security companies, 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 government contract security companies are there based in the United States?

RevenueBase identified 1,078 government contract security companies 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?

Securitas Security Services Usa, INC, headquartered in Boise, tops this list with the largest team on record.

Which city has the most government contract security companies?

New York leads with 36 headquartered companies, followed by Houston (33) and Los Angeles (31).

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 5,004 verified decision-maker contacts tracked across these 1,078 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 3, 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.