Skip to main content

Company lists · Data verified August 2026

Top 25 Cybersecurity consulting for defense based in the United States

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 5,960 companies tracked

There are 5,960 cybersecurity consulting for defense headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 174,554 professional contacts across them, including 30,724 with verified work emails and 74,727 with mobile numbers. New York is the largest hub.

This list covers cybersecurity consulting for defense headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

5,960Companies
174,554Contacts tracked
30,724Verified emails
74,727Mobile numbers
Unlock all 5,960 companies Free account · no credit card · 2 minutes

The 25 largest cybersecurity consulting for defense based in the United States

Ranked by team size
Top 25 of 5,960 cybersecurity consulting for defense based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#CompanyHQEmployeesContactsVerified emails
1Northrop GrummanSan Diego, CA10001+75,0001,247
2SymantecSan Jose, CA10001+11,179876
3Sierra Nevada CorporationSparks, NV1,001-5,0004,44281
4OPTIVChantilly, VA1,001-5,0002,2061,422
5Thales Cybersecurity ProductsAustin, TX1,001-5,0001,252645
6Guidepoint SecurityTampa, FL1,001-5,0001,234809
7VT Group VTGCalifornia, MD1,001-5,0001,180481
8Agile DefenseHuntsville, AL1,001-5,0001,080402
9CoalfireChicago, IL1,001-5,000960613
10Tyto Athene, LLCAmherst, VA1,001-5,00085816
11ArcfieldChantilly, VA1,001-5,00079112
12Telos CorporationLas Vegas, NV501-1,000636230
13Planned Systems InternationalValparaiso, FL1,001-5,000608316
14Applied Research SolutionsBoston, MA501-1,00059518
15Ultraviolet CyberPhoenix, AZ501-1,000517258
16SecurityhqNew York, NY501-1,000492279
17Gryphon Technologies, INCWashington, DC1,001-5,00045489
18United Security, Inc. USIBoston, MA1,001-5,00040972
19Edgewater Federal Solutions, INCPocatello, ID501-1,000407222
20Macaulay-Brown, Inc. Macb , An Alion CompanyDayton, OH1,001-5,00038211
21System High CorporationChantilly, VA501-1,000369177
22Dark WolfBellevue, NE501-1,000348224
23MarkonFalls Church, VA501-1,000271137
24VMD CorpSacramento, CA501-1,0002516
25Threat Tec, LLCHampton, VA501-1,000249159

Showing 25 of 5,960 cybersecurity consulting for defense based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 30,724 reachable decision-makers.

Free account · no credit card

See all 5,960 companies

Cybersecurity consulting for defense based in the United States at a glance

As of Aug 28, 2026
1-10Median size (employees)
New YorkLargest hub · 161 HQs
74,727Contacts with mobile numbers
59Emails re-verified in last 30 days

Companies by employee count

1-10
3,480
11-50
1,725
51-200
545
201-500
118
501-1,000
27
1,001-5,000
33
10001+
7

Cybersecurity consulting for defense by metro

MetroCompanies
Cybersecurity consulting for defense in New York161
Cybersecurity consulting for defense in Washington155
Cybersecurity consulting for defense in Atlanta114
Cybersecurity consulting for defense in Houston105
Cybersecurity consulting for defense in Austin95
Cybersecurity consulting for defense in Dallas93
Cybersecurity consulting for defense in Miami91

How this list was built

Source
The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion
Companies whose own business descriptions match “cybersecurity consulting for defense”, with match quality audited by blind human judging, and headquartered in the United States.
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
Contact records re-verify on a rolling cadence; 59 contacts on this list were re-verified in the last 30 days.
Refresh
Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cybersecurity consulting for defense are there based in the United States?

There are 5,960 cybersecurity consulting for defense headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Northrop Grumman, headquartered in San Diego, tops this list with the largest team on record.

Which city has the most cybersecurity consulting for defense?

New York leads with 161 headquartered companies, followed by Washington (155) and Atlanta (114).

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 30,724 verified decision-maker contacts tracked across these 5,960 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 5,960 cybersecurity consulting for defense based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Browse: Companies home · All United States lists · All Cybersecurity consulting for defense lists · New lists

About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.

More company lists