Company lists · Data refreshed September 2026

Top 25 Infrastructure hardening contractors based in the United States

Name: Infrastructure hardening contractors based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,434 companies tracked

RevenueBase identified 1,434 company matches for infrastructure hardening contractors associated with the United States as of September 2026 and tracks 22,645 professional contacts across them, including 5,618 with verified work emails. Washington is the largest hub.

This list covers company matches for infrastructure hardening contractors associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 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 RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

1,434Companies

22,645Contacts tracked

5,618Verified emails

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The 25 largest infrastructure hardening contractors based in the United States

Ranked by team size

Top 25 of 1,434 company matches for infrastructure hardening contractors based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 17, 2026	10001+	1,949 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	IEM	Exact match	Morrisville, NC, United StatesHQ recorded Sep 17, 2026	501-1,000	1,175 contacts →
	Exact match “IEM is a professional services firm dedicated to building a safe, secure, and resilient world.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Brosnan Risk Consultants	Exact match	Pearl River, NY, United StatesHQ recorded Sep 17, 2026	5,001-10,000	1,050 contacts →
	Exact match “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	PPC	Exact match	Trevose, PA, United StatesHQ recorded Sep 17, 2026	201-500	979 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Structural	Exact match	Columbia, MD, United StatesHQ recorded Sep 17, 2026	1,001-5,000	611 contacts →
	Exact match “STRUCTURAL integrates technology-driven solutions into its industry-leading specialty contracting services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	MSA Security	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	10001+	571 contacts →
	Exact match “Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Security Alliance	Exact match	Miami, FL, United StatesHQ recorded Sep 17, 2026	1,001-5,000	553 contacts →
	Exact match “Security Alliance is a highly experienced provider of security solutions for private and business environments.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Xcelerate Solutions	Exact match	Mclean, VA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	447 contacts →
	Exact match “At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	United Security, Inc. USI	Exact match	Red Bank, NJ, United StatesHQ recorded Sep 17, 2026	1,001-5,000	416 contacts →
	Exact match “United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Feditc	Exact match	Rockville, MD, United StatesHQ recorded Sep 17, 2026	201-500	296 contacts →
	Exact match “Founded in 2003, FEDITC, LLC is an ISO and CMMI level 3 certified cyber security, IT, and engineering services firm.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Baxter Clewis Cybersecurity	Exact match	Cedar Hill, TX, United StatesHQ recorded Sep 17, 2026	201-500	255 contacts →
	Exact match “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	VMD Corp	Exact match	Mclean, VA, United StatesHQ recorded Sep 17, 2026	501-1,000	254 contacts →
	Exact match “About VMD VMD, now a part of Xcelerate Solutions, is a leading defense and national security company, delivering integrated solutions in enterprise security, strategic consulting…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Orion Security Solutions	Exact match	Edmond, OK, United StatesHQ recorded Sep 17, 2026	51-200	250 contacts →
	Exact match “Orion Security Systems (OSS) provides elite technical, physical, and cyber security solutions for customers with simple to complex needs.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	Tricorps	Exact match	Oklahoma City, OK, United StatesHQ recorded Sep 17, 2026	501-1,000	235 contacts →
	Exact match “TriCorps is an integrated security and technology firm that specializes in providing cost effective, world-class services tailored to meeting the needs of our clients.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Sawdey Solution Services	Exact match	Beavercreek, OH, United StatesHQ recorded Sep 17, 2026	201-500	234 contacts →
	Exact match “For over 20 years, Sawdey Solutions Services has provided both Government and commercial clients with innovative cross-disciplined professional services that aim not only to…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Mindpoint Group, A Quantum SKY Company	Exact match	Reston, VA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	204 contacts →
	Exact match “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Valiant Solutions	Exact match	Mclean, VA, United StatesHQ recorded Sep 17, 2026	201-500	152 contacts →
	Exact match “Valiant Solutions, LLC stands out as a premier provider of Cybersecurity and IT services aiding the Federal Government in staying ahead of complex information security challenges.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Coastal International Security, INC	Exact match	Espanola, NM, United StatesHQ recorded Sep 17, 2026	201-500	151 contacts →
	Exact match “Coastal International Security provides strategic planning and security services to high-impact government agencies such as the Department of State, Homeland Security and Defense…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	OPS Consulting, LLC	Exact match	Hanover, MD, United StatesHQ recorded Sep 17, 2026	51-200	144 contacts →
	Exact match “OPS comes from the Latin meaning ‘the power to help’; we are thought leaders and innovators with 'the power to help' our mission customers.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	At-Risk International, INC	Exact match	Reston, VA, United StatesHQ recorded Sep 17, 2026	51-200	139 contacts →
	Exact match “Our goal is to create and maintain safe environments by providing threat analysis, protection, investigations, consulting, intelligence and security training services everywhere…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Silotech Group, INC	Exact match	San Antonio, TX, United StatesHQ recorded Sep 17, 2026	51-200	134 contacts →
	Exact match “Silotech Group emerged in 2008, as a valued leader in the consulting space, with over 50 years of accumulative expertise in Advanced Cyber Technologies, Systems Engineering…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	I2g Systems	Exact match	Ann Arbor, MI, United StatesHQ recorded Sep 17, 2026	201-500	134 contacts →
	Exact match “i2G Systems is an industry leading safety and security technology and professional services firm, specializing in design, engineering, program management, installation…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	ITC Defense Corp	Exact match	North Charleston, SC, United StatesHQ recorded Sep 17, 2026	51-200	122 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Sealing Technologies, A Parsons Company	Exact match	Columbia, MD, United StatesHQ recorded Sep 17, 2026	51-200	119 contacts →
	Exact match “SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Directdefense	Exact match	Denver, CO, United StatesHQ recorded Sep 17, 2026	51-200	111 contacts →
	Exact match “DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “infrastructure hardening contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 1,434 infrastructure hardening contractors based in the United States

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Infrastructure hardening contractors based in the United States at a glance

As of Sep 17, 2026

24.8%Verified-email coverage

15.8Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · Washington

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

799

11-50

435

51-200

148

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 1,434 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “infrastructure hardening contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 5,618 professional contacts with verified work emails across the full matched dataset. 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 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “infrastructure hardening contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many infrastructure hardening contractors are there based in the United States?

RevenueBase identified 1,434 company matches for infrastructure hardening contractors associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Paragon Systems INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most infrastructure hardening contractors?

Washington leads with 38 company records, followed by New York (26) and Houston (25).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 5,618 professional contacts with verified work emails tracked across these 1,434 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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.