Company lists · Data refreshed November 2026

Top 16 Defense engineering services based in Fairfax, United States

RevenueBase identified 26 company matches for defense engineering services associated with Fairfax, United States as of November 2026 and tracks 2,612 professional contacts across them, including 635 with verified work emails. Across the United States, Huntsville is the largest hub for this category (124 companies); Fairfax has 26.

This list covers company matches for defense engineering services associated with Fairfax, 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 November 6, 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 Nov 6, 2026 How this list was built
26Companies
2,612Contacts tracked
635Verified emails
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The 16 largest defense engineering services based in Fairfax, United States

Ranked by team size
Top 16 of 26 company matches for defense engineering services based in Fairfax, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 2026201-500295 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 2026201-500140 contacts →

Exact match

“Empower AI has acquired Highlight Technologies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 2026201-500123 contacts →

Exact match

“Founded in 2009 and based out of the Washington, D.C.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchFairfax, United StatesHQ recorded Nov 6, 202651-200108 contacts →

Exact match

“Founded in 2006, Widelity is a leading provider of business and network engineering consulting to global technology driven industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202651-200100 contacts →

Exact match

“MANDEX is a small diversified, high technology, research, and engineering company that focuses principally in the market areas of national defense, national security, information…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202651-20074 contacts →

Exact match

“Since 2013 we have grown from a services-only company to becoming a DoD prime contractor designing, developing and producing missiles.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202651-20071 contacts →

Exact match

“Technology, Automation & Management Inc.(TeAM) has been a leader in delivering innovative IT solutions to the federal government since 1985.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202611-5070 contacts →

Exact match

“FEDSYS is a professional services company focused on providing critical operational services, in challenging environments, to enable our government customers’ mission success.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202611-5066 contacts →

Exact match

“Spectric Labs corporate webpage.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202651-20044 contacts →

Exact match

“Conceras, LLC, an SBA 8(a) Certified Small Business, was founded in 2006 as a customer-focused systems engineering consulting firm.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202611-5031 contacts →

Exact match

“Moriarty and Associates Consulting Corporation (MAC) is a U.S-based technology company supporting dynamic, complex environments within the military, intelligence, and private…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“Miklos Systems, Inc.(MSI) is a 100% Employee-Owned company providing software and systems engineering services to customers, primarily in the Federal Government.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202611-507 contacts →

Exact match

“Prysm Technology, a growing professional IT solutions and services company, was formed in December 2005 to deliver best-in-class program management consulting, system engineering…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 202611-505 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Advanced Security & Infrastructure (ASI) is a leading provider of technical, engineering, and support services for federal agencies.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchFairfax, VA, United StatesHQ recorded Nov 6, 20261-101 contacts →

Exact match

“Cost Management Solutions, LLC (CMS) is a government contracting firm specializing in financial management, data analysis, and IT services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 16 of 26 defense engineering services based in Fairfax, United States

See the full list, filter by size, metro and specialty, and access 635 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Defense engineering services based in Fairfax, United States at a glance

As of Nov 6, 2026
24.3%Verified-email coverage
100.5Average contacts per company
11-50Median size (employees)
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
6
11-50
8
51-200
6
201-500
5
501-1,000
1

Email recency for this list is measured across the whole United States list rather than for Fairfax, so it is reported there. Company counts and contact totals on this page are exact for Fairfax, over 26 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 Fairfax, United States whose business descriptions match “defense engineering services” 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 635 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 November 6, 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 “defense engineering services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many defense engineering services are there based in Fairfax, United States?

RevenueBase identified 26 company matches for defense engineering services associated with Fairfax, United States as of November 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?

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

Which city in the United States has the most defense engineering services?

Huntsville leads the United States with 124 company records, followed by Arlington (59) and Washington (59). Fairfax has 26.

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 635 professional contacts with verified work emails tracked across these 26 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 November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 26 defense engineering services based in Fairfax, United States. Start with a free account, no credit card.

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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.