Company lists · Data refreshed September 2026
Top 25 Homeland security consultants based in the United States
RevenueBase identified 1,236 homeland security consultants headquartered in the United States as of September 2026 and tracks 19,536 professional contacts across them, including 5,414 with verified work emails. Washington is the largest hub.
This list covers homeland security consultants 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.
The 25 largest homeland security consultants based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,949 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 28, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,655 contacts → | ||||
Indirect evidence “Worldwide, we are most recognized for our leadership in fire protection engineering, a tradition of responsibility we have advanced with pride since 1939.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 3 | 1,175 contacts → | ||||
Indirect evidence “IEM is a professional services firm dedicated to building a safe, secure, and resilient world.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,050 contacts → | ||||
Strong evidence “Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 5 | 571 contacts → | ||||
Indirect evidence “Allied Universal Enhanced Protection Services delivers unrivaled threat mitigation expertise for government and business entities worldwide.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 6 | 553 contacts → | ||||
Partial evidence “Security Alliance is a highly experienced provider of security solutions for private and business environments.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 7 | 467 contacts → | ||||
Indirect evidence “AFIMAC Global: Trusted Crisis Management & Business Continuity Partner.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 8 | 447 contacts → | ||||
Indirect evidence “At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 9 | 271 contacts → | ||||
Indirect evidence “WBB (now a part of Serco) is a leading government and public sector solutions provider, dedicated to the enduring success of our clients.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 10 | 268 contacts → | ||||
Indirect evidence “We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 11 | 250 contacts → | ||||
Partial evidence “Orion Security Systems (OSS) provides elite technical, physical, and cyber security solutions for customers with simple to complex needs.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 12 | 225 contacts → | ||||
Indirect evidence “Mason & Hanger, a Day & Zimmermann Company, is dedicated to providing architectural and engineering (A/E) services, specializing in worldwide design of secure, mission-driven…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 13 | 205 contacts → | ||||
Indirect evidence “SoBran, Inc.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 14 | 202 contacts → | ||||
Indirect evidence “Strategic Analysis Inc.(SA) is an industry-leading government professional services firm that excels in providing innovative solutions to the problems of today and tomorrow.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 15 | 191 contacts → | ||||
Indirect evidence “MELE Associates, Inc.(MELE) has been delivering outstanding service and support to federal, local, and state government agencies and commercial customers for more than three…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 16 | 179 contacts → | ||||
Partial evidence “Signature Science's consultants serve government and commercial clients through a wide array of technical offerings.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 17 | 164 contacts → | ||||
Partial evidence “Checkout our latest articles at AEGIS Security & Investigations specializes in high end security, investigation, training and consulting solutions.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 18 | 151 contacts → | ||||
Strong evidence “Coastal International Security provides strategic planning and security services to high-impact government agencies such as the Department of State, Homeland Security and Defense…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 19 | 149 contacts → | ||||
Partial evidence “Faith Group LLC was established in 2004 as a full-service women-owned consulting and engineering firm specializing in the planning and design of security, IT, audiovisual, safety…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 20 | 148 contacts → | ||||
Indirect evidence “AC Disaster Consulting offers emergency management advisory and consulting services for private entities; non-profit organizations; and federal, state, local, and tribal…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 21 | 144 contacts → | ||||
Indirect evidence “OPS comes from the Latin meaning ‘the power to help’; we are thought leaders and innovators with 'the power to help' our mission customers.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 22 | 134 contacts → | ||||
Partial evidence “i2G Systems is an industry leading safety and security technology and professional services firm, specializing in design, engineering, program management, installation…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 23 | 108 contacts → | ||||
Partial evidence “Covered 6 is a global security and training company that is based in Southern California.” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 24 | 103 contacts → | ||||
Partial evidence “Communications Resource, Inc.(CRI) is a minority and Woman-Owned Small Business with over 30 years of focused security performance supporting over 40 government and commercial…” Source: RevenueBase Database · checked Sep 28, 2026Thanks. The Data Team will review it. | |||||
| 25 | 103 contacts → | ||||
Indirect evidence “Effective October 25, 2024, Dignari has been acquired by EY and will now be known as EY Dignari.” Source: RevenueBase Database · checked Sep 28, 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: homeland security consultants. 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 homeland security consultants.
- Partial evidence
- Its own public description names part of homeland security consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name homeland security consultants. 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 1,236 homeland security consultants based in the United States
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Homeland security consultants based in the United States at a glance
As of Sep 28, 2026Companies by employee count
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 1,236 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 homeland security consultants, 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 “homeland security consultants”. 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 homeland security consultants), 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 homeland security consultants, 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, 5,414 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.
Homeland security consultants by metro
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 homeland security consultants, 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 homeland security consultants are there based in the United States?
RevenueBase identified 1,236 homeland security consultants 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?
Paragon Systems INC, headquartered in Herndon, tops this list with the largest team on record.
Which city has the most homeland security consultants?
Washington leads with 50 headquartered companies, followed by New York (32) and Houston (24).
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 5,414 verified decision-maker contacts tracked across these 1,236 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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Homeland security consultants by geography
- Homeland security consultants based in Paris, France
- Homeland security consultants based in London, United Kingdom
- Homeland security consultants based in New York, United States
- Homeland security consultants based in Washington, United States
- Homeland security consultants based in Australia
- Homeland security consultants based in Brazil
- Homeland security consultants based in Canada
- Homeland security consultants based in France
- Homeland security consultants based in Germany
- Homeland security consultants based in India
- Homeland security consultants based in Israel
- Homeland security consultants based in the Netherlands
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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