Company lists · Data refreshed September 2026
Top 20 Information security consultants based in Fairfax, United States
RevenueBase identified 33 information security consultants headquartered in Fairfax, United States as of September 2026 and tracks 432 professional contacts across them, including 152 with verified work emails. New York is the largest hub.
This list covers information security consultants headquartered in Fairfax, 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 3, 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 20 largest information security consultants based in Fairfax, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | OnpointIndirect evidence | 104 | |||
“OnPoint is a technology and consulting services partner helping government leaders secure their systems, effectively operate, and deliver critical services in today’s increasingly…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 93 | ||||
“JCS Solutions is a premier cybersecurity and technology solutions provider.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | True Zero TechnologiesIndirect evidence | 50 | |||
“True Zero Technologies ("True Zero") is a seasoned, Veteran-Owned Small Business (VOSB) specializing in comprehensive cybersecurity and consulting services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | Usmax CorporationPartial evidence | 40 | |||
“USmax Corporation is an ISO 9001:2015 registered, ISO registered, ISO 27001:2013 registered, and CMMI-SVC Level 3 appraised Enterprise Information Technology (IT) and Professional…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | Polito, INCIndirect evidence | 16 | |||
Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | Senet InternationalPartial evidence | 16 | |||
“SeNet International Corporation is a company of information technology consulting professionals committed to helping public and private sector organizations securely operate their…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 13 | ||||
“CAGE 6VE87 | UEI DL3JL6J1XG98 | SBA 8(a)| 8(a) STARS | HACS SINs | CMMI-SVC | ISO 9001 | ISO 27001 | ISO | Assurit, an 8(a) certified and recognized leader in cybersecurity, is…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 13 | ||||
“Jacob & Sundstrom, Inc.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 9 | ||||
“IT consulting company providing cyber security, analytics and data science services.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 8 | ||||
“Implementing Zero Trust Architecture to Enhance Security, Productivity, and Data Integrity, while Optimizing for Future-Readiness and Mission Success 8(a) Certified Small Business…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 8 | ||||
“A Cybersecurity Firm Focused on Securing Mission-Critical Systems, Protecting Supply Chains, and Safeguarding Digital Assets Within Federal Agencies, While Ensuring Regulatory…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | PurplesecIndirect evidence | 8 | |||
“Committed to Intelligent Risk Defense.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 6 | ||||
“CapSentinel is a Small Business that offers world class Information Technology (IT) Risk, Cybersecurity, and financial management solutions to help commercial and federal…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 4 | ||||
“Headquartered in Fairfax, VA, Cleared Systems specializes in helping federal contractors and highly regulated organizations meet cybersecurity and compliance requirements under…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | Msnet Solutions, LLCPartial evidence | 3 | |||
“MSNET SOLUTIONS is owned and operated by professional IT consultants who know what it takes to design, implement, and support secure networks utilizing the latest technologies…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | Prosoft Systems IntlPartial evidence | 3 | |||
“A professional services firm focused on helping organizations successfully mitigate threats with Microsoft Security, Compliance, and Identity solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | Waveport SecurityPartial evidence | 2 | |||
“LEADING CYBER SOLUTIONS WavePort Security applies proven tools, professional services, and years of cyber-focused experience to create security strategies that provide unrivaled…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 2 | ||||
“GroCyber brings over 4 decades of cyber security experience supporting large enterprise security programs and growing start-up and turn-around companies.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | Xpect Solutions, INCPartial evidence | 1 | |||
“If securing your IT systems, network infrastructure, and facilities is foremost on your mind, Xpect Solutions can help.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | Kobel Systems LLCPartial evidence | 1 | |||
“In today’s fast-paced and competitive market, businesses must boost revenue, cut costs, and streamline operations, all while prioritizing security.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 20 of 33 information security consultants based in Fairfax, United States
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Information security consultants based in Fairfax, United States at a glance
As of Sep 3, 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 Fairfax, over 33 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 information security consultants, 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 Fairfax, United States whose own description of what they do matches “information security consultants”. 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 information security consultants, and records with no verified work email. Companies headquartered outside Fairfax 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, 152 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.
Information security consultants by metro in the United States
- Information security consultants in New York223
- Information security consultants in Washington147
- Information security consultants in Houston139
- Information security consultants in Atlanta128
- Information security consultants in Chicago106
- Information security consultants in Miami106
- Information security consultants in Dallas102
- Information security consultants in Austin99
- Information security consultants in Tampa85
- Information security consultants in San Francisco80
- Information security consultants in Los Angeles79
- Information security consultants in San Diego65
- Information security consultants in Charlotte63
- Information security consultants in Arlington61
- Information security consultants in Boston61
- Information security consultants in Denver58
- Information security consultants in Phoenix52
- Information security consultants in Seattle51
- Information security consultants in San Antonio50
- Information security consultants in Alexandria48
- Information security consultants in Orlando47
- Information security consultants in Reston43
- Information security consultants in Las Vegas41
- Information security consultants in Raleigh39
- Information security consultants in Portland38
- Information security consultants in Columbia37
- Information security consultants in Ashburn34
- Information security consultants in Mclean34
- Information security consultants in Fairfax33
- Information security consultants in Minneapolis33
- Information security consultants in Baltimore32
- Information security consultants in Columbus30
- Information security consultants in Scottsdale30
- Information security consultants in Herndon29
- Information security consultants in Nashville29
- Information security consultants in Richmond29
- Information security consultants in Huntsville28
- Information security consultants in Wilmington28
- Information security consultants in Philadelphia27
- Information security consultants in Plano27
- Information security consultants in Indianapolis26
- Information security consultants in Pittsburgh26
- Information security consultants in Sheridan26
Frequently asked
How many information security consultants are there based in Fairfax, United States?
RevenueBase identified 33 information security consultants headquartered in Fairfax, 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?
Onpoint, headquartered in Fairfax, tops this list with the largest team on record.
Which city has the most information security consultants?
New York leads with 223 headquartered companies, followed by Washington (147) and Houston (139).
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 152 verified decision-maker contacts tracked across these 33 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 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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