Company lists · Data refreshed September 2026

Top 25 Defense IT consulting firms worldwide

Name: Defense IT consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 29,954 companies tracked

RevenueBase identified 29,954 company matches for defense IT consulting firms worldwide as of September 2026 and tracks 846,412 professional contacts across them, including 181,935 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for defense IT consulting firms worldwide, 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 September 28, 2026. Country and city lists for defense IT consulting firms follow the table.

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 Sep 28, 2026 How this list was built

29,954Companies

846,412Contacts tracked

181,935Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest defense IT consulting firms worldwide

Ranked by team size

Top 25 of 29,954 company matches for defense IT consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Northrop Grumman	Exact match	Falls Church, VA, United StatesHQ recorded Sep 28, 2026	10001+	74,984 contacts →
	Exact match “We are a close-knit community of big thinkers collaborating to keep the world safe.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Leidos	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	10001+	27,416 contacts →
	Exact match “Leidos is an industry and technology leader serving government & commercial customers with smarter, more efficient digital and mission innovations.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	General Dynamics Information Technology	Exact match	Falls Church, VA, United StatesHQ recorded Sep 28, 2026	10001+	23,974 contacts →
	Exact match “GDIT is a global technology and professional services company that delivers solutions, technology and mission services to every major agency across the U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Parsons Corporation	Exact match	Chantilly, VA, United StatesHQ recorded Sep 28, 2026	10001+	19,456 contacts →
	Exact match “Founded in 1944, Parsons Corporation, a digitally enabled solutions provider, is focused on creating the future of the defense, intelligence, and critical infrastructure markets.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Caci International INC	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	10001+	19,221 contacts →
	Exact match “At CACI International Inc (NYSE: CACI), our talented and dynamic employees are ever vigilant in delivering distinctive expertise and technology to meet our customers’ greatest…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	CDW	Exact match	Vernon Hills, IL, United StatesHQ recorded Sep 28, 2026	10001+	13,155 contacts →
	Exact match “At CDW, we know how to make technology work so people can do great things.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Guidehouse	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	10001+	12,815 contacts →
	Exact match “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Peraton	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	10001+	10,793 contacts →
	Exact match “At Peraton, we're at the forefront of delivering the next big thing every day.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Dyncorp International	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	10001+	9,964 contacts →
	Exact match “DynCorp International is now part of Amentum.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Mantech	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	9,697 contacts →
	Exact match “MANTECH is more than a technology company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	ELM Company	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 28, 2026	1,001-5,000	6,982 contacts →
	Exact match “Elm is the leading provider of innovative secure services & solutions to both public and private sectors in Saudi Arabia.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Datacom	Exact match	Auckland, New ZealandHQ recorded Sep 28, 2026	5,001-10,000	5,958 contacts →
	Exact match “Customer focused values.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Groupe SII	Exact match	Paris, FranceHQ recorded Sep 28, 2026	10001+	4,928 contacts →
	Exact match “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Cegeka	Exact match	Hasselt, BelgiumHQ recorded Sep 28, 2026	5,001-10,000	4,551 contacts →
	Exact match “The digital world moves fast.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Asrc Federal	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	4,542 contacts →
	Exact match “ASRC Federal’s employees provide solutions for more than 30 U.S.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Aricent	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 28, 2026	10001+	4,302 contacts →
	Exact match “Aricent is now Altran, delivering industry innovations at future speed.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	GMV	Exact match	Tres Cantos, SpainHQ recorded Sep 28, 2026	1,001-5,000	3,351 contacts →
	Exact match “At GMV, we design the future through technology.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	SENER	Exact match	Getxo, SpainHQ recorded Sep 28, 2026	1,001-5,000	3,221 contacts →
	Exact match “At Sener we want to transform the world by challenging the boundaries of technology.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Quest Software	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	3,206 contacts →
	Exact match “At Quest Software, we help organizations build modern, trusted foundations for AI.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	EJADA	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 28, 2026	1,001-5,000	3,050 contacts →
	Exact match “ejada is a leading technology solutions provider in the Middle East and North Africa (MENA) region, headquartered in Saudi Arabia since 2005.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	BAE Systems Digital Intelligence	Exact match	Canberra, United KingdomHQ recorded Sep 28, 2026	1,001-5,000	2,947 contacts →
	Exact match “Digital Intelligence is home to over 4,500 digital, cyber and intelligence experts across 13 countries.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Computer Futures	Exact match	London, United KingdomHQ recorded Sep 28, 2026	501-1,000	2,673 contacts →
	Exact match “Building tomorrow’s tech landscape together Computer Futures is a Technology specialist, part of SThree, the global STEM workforce consultancy.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	NIL LTD	Exact match	Ljubljana, SloveniaHQ recorded Sep 28, 2026	n/a	2,523 contacts →
	Exact match “NIL is a globally recognized provider of advanced data center, network, cloud, cyber security solutions as well as services for business and industry environments, state…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,222 contacts →
	Exact match “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	CS Group	Exact match	Le Plessis Robinson, FranceHQ recorded Sep 28, 2026	5,001-10,000	2,092 contacts →
	Exact match “Expert des systèmes critiques Conception, réalisation, déploiement & maintenance de systèmes critiques, basés sur des solutions et des produits innovants, garantissant…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “defense IT consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 29,954 defense IT consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 181,935 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Defense IT consulting firms worldwide at a glance

As of Sep 28, 2026

21.5%Verified-email coverage

28.3Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

14,903

11-50

10,100

51-200

3,462

201-500

899

501-1,000

261

1,001-5,000

200

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for defense IT consulting firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “defense IT consulting firms” 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. 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 181,935 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 September 28, 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.

Defense IT consulting firms by location

195 lists · largest first

Every Defense IT consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 IT consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many defense IT consulting firms are there worldwide?

RevenueBase identified 29,954 company matches for defense IT consulting firms worldwide as of September 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?

Northrop Grumman tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most defense IT consulting firms?

The United States leads with 9,223 companies, followed by India (2,053) and the United Kingdom (1,204). Every defense IT consulting firms list by country and city is linked on this page.

Which city has the most defense IT consulting firms?

London leads with 417 company records, followed by Washington (282) and Sao Paulo (267).

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 181,935 professional contacts with verified work emails tracked across these 29,954 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 September 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 29,954 defense IT consulting firms worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.