Company lists · Data refreshed September 2026

Top 25 Cybersecurity service providers based in Alexandria, United States

Name: Cybersecurity service providers based in Alexandria, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 52 companies tracked

RevenueBase identified 52 cybersecurity service providers headquartered in Alexandria, United States as of September 2026 and tracks 473 professional contacts across them, including 148 with verified work emails. New York is the largest hub.

This list covers cybersecurity service providers headquartered in Alexandria, 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 14, 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 14, 2026 86% judged on-target in blind review

52Companies

473Contacts tracked

148Verified emails

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The 25 largest cybersecurity service providers based in Alexandria, United States

Ranked by team size

Top 25 of 52 cybersecurity service providers based in Alexandria, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity service providers: 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	Onezero Solutions	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	201-500	68 contacts →
	Indirect evidence “OneZero Solutions is an 8(a), Service-Disabled Veteran-Owned Small Business (SDVOSB) that is problem-solving and solutions-oriented.” Source: RevenueBase Database · checked Sep 14, 2026
2	Advantage Sci, LLC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	201-500	56 contacts →
	Indirect evidence “Advantage SCI is a professional security and counterintelligence firm, headquartered in Alexandria, Virginia.” Source: RevenueBase Database · checked Sep 14, 2026
3	Arrowpoint Corporation	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	51-200	47 contacts →
	Indirect evidence “Arrowpoint, a MorphWorks company, has delivered premiere information technology and consulting services.” Source: RevenueBase Database · checked Sep 14, 2026
4	Securicon, LLC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	27 contacts →
	Indirect evidence “Securicon provides expert consulting for application, system and network security.” Source: RevenueBase Database · checked Sep 14, 2026
5	Focus Data Solutions	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	26 contacts →
	Indirect evidence “Focus Data Solutions is Your Partner for Tomorrow’s IT.” Source: RevenueBase Database · checked Sep 14, 2026
6	Whitehawk INC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	26 contacts →
	Strong evidence “At WhiteHawk, we streamline cybersecurity decision-making through a three-step approach: 1.” Source: RevenueBase Database · checked Sep 14, 2026
7	Safedns	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	23 contacts →
	Indirect evidence “At SafeDNS, we are committed to creating a safer and more secure online environment for SMBs, enterprises, ISPs, MSPs, OEMs, and Education.” Source: RevenueBase Database · checked Sep 14, 2026
8	TEAL	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	51-200	22 contacts →
	Indirect evidence “Teal provides exceptional managed IT solutions for small- to medium-sized organizations that value real partnerships and elevated security - strategically accelerating their…” Source: RevenueBase Database · checked Sep 14, 2026
9	Envision Consulting LLC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	11 contacts →
	Strong evidence “Envision Consulting is an award-winning provider of proactive and full-service managed IT support, IT consulting, cloud solutions and cybersecurity, serving small and mid-sized…” Source: RevenueBase Database · checked Sep 14, 2026
10	Aligned Technology Solutions	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	10 contacts →
	Indirect evidence “Since 2010 Aligned Technology Solutions has been helping organizations leverage and manage technology to grow and secure their businesses.” Source: RevenueBase Database · checked Sep 14, 2026
11	Gray Tier Technologies, LLC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	9 contacts →
	Strong evidence “Gray Tier Technolgies is a privately held company providing full cyclic cybersecurity services and products.” Source: RevenueBase Database · checked Sep 14, 2026
12	Pendulum	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	9 contacts →
	Indirect evidence “Pendulum is transforming cyber defense and information security.” Source: RevenueBase Database · checked Sep 14, 2026
13	Patchadvisor, INC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “PatchAdvisor is a complete IT security firm focused on providing world class IT security services to our clients.” Source: RevenueBase Database · checked Sep 14, 2026
14	Matrix Msp, LLC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	7 contacts →
	Indirect evidence “Providing IT Managed Security Services, Support & Consulting to businesses, associations and home office users too.” Source: RevenueBase Database · checked Sep 14, 2026
15	Tech Leader Solutions, LLC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	7 contacts →
	Strong evidence “HUBZone Certified, Tech Leader Solutions, LLC provides Cybersecurity and IT Consulting services to CIOs and CTOs, supporting a wide range of IT programs through strategy…” Source: RevenueBase Database · checked Sep 14, 2026
16	Aptnexus	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	5 contacts →
	Strong evidence “Founded in 2012, APTNEXUS is a premier provider of IT Services with a specialization in cybersecurity governance, risk, and compliance solutions for both information and…” Source: RevenueBase Database · checked Sep 14, 2026
17	Cerium Technology, INC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	3 contacts →
	Indirect evidence “Cerium Technology Services was established in 2009 to provide professional and affordable IT services.” Source: RevenueBase Database · checked Sep 14, 2026
18	Marshal Group	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “Marshal Group Solutions.” Source: RevenueBase Database · checked Sep 14, 2026
19	Fusion Technology Strategies, INC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “Fusion Technology Strategies (Fusion) is an SBA-certified Woman-Owned Small Business (WOSB) that specializes in delivering exceptional Cyber Security, CIO and CISO Advisory…” Source: RevenueBase Database · checked Sep 14, 2026
20	Data Defense Solutions	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “Security Staff Augmentation DDS can help to augment your security staff as you build and grow your internal security team.” Source: RevenueBase Database · checked Sep 14, 2026
21	Lc&j Security Solutions LLC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Strong evidence “LC & J Security Solutions is a proudly certified women-owned cybersecurity firm specializing in securing identities, critical data, and digital assets.” Source: RevenueBase Database · checked Sep 14, 2026
22	Intelligent Data INC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	11-50	2 contacts →
	Strong evidence “We are a cybersecurity professional services company that implements security solutions for Federal, State, Local, Commercial, Education, and SMB entities.” Source: RevenueBase Database · checked Sep 14, 2026
23	OTX Partners LLC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “The IT Managed Services business has never been more risky.” Source: RevenueBase Database · checked Sep 14, 2026
24	Secure Consulting Solutions LLC	Strong evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Strong evidence “Secure Solutions DC is a forward-thinking cybersecurity firm specializing in network and application penetration testing, securing networks in compliance with DFARS/NIST 800-53…” Source: RevenueBase Database · checked Sep 14, 2026
25	Securible, LLC	Indirect evidence	Alexandria, VA, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “Securible, LLC is an information security service provider offering training, implementation and support to organizations of all sizes.” Source: RevenueBase Database · checked Sep 14, 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: cybersecurity service providers. 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 cybersecurity service providers.
Partial evidence: Its own public description names part of cybersecurity service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity service providers. 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 52 cybersecurity service providers based in Alexandria, United States

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Cybersecurity service providers based in Alexandria, United States at a glance

As of Sep 14, 2026

31.3%Verified-email coverage

9.1Average contacts per company

1-10Median size (employees)

521.2%Largest-city concentration · New York

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Alexandria, so it is reported there. Company counts and contact totals on this page are exact for Alexandria, over 52 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 cybersecurity service providers, 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 Alexandria, United States whose own description of what they do matches “cybersecurity service providers”. 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 cybersecurity service providers), 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 cybersecurity service providers, and records with no verified work email. Companies headquartered outside Alexandria 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, 148 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 14, 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.

Cybersecurity service providers by metro in the United States

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 cybersecurity service providers, 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 cybersecurity service providers are there based in Alexandria, United States?

RevenueBase identified 52 cybersecurity service providers headquartered in Alexandria, 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?

Onezero Solutions, headquartered in Alexandria, tops this list with the largest team on record.

Which city has the most cybersecurity service providers?

New York leads with 271 headquartered companies, followed by Houston (160) and Atlanta (148).

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 148 verified decision-maker contacts tracked across these 52 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 14, 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.