Company lists · Data refreshed September 2026

Top 25 Government systems integration firms worldwide

Name: Government systems integration firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 19,668 companies tracked

RevenueBase identified 19,668 government systems integration firms worldwide as of September 2026 and tracks 657,540 professional contacts across them, including 168,424 with verified work emails. The United States is the largest market and Dubai the largest hub.

This list covers government systems integration firms worldwide, 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 28, 2026. Country and city lists for government systems integration firms follow the table.

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 28, 2026 86% judged on-target in blind review

19,668Companies

657,540Contacts tracked

168,424Verified emails

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

The 25 largest government systems integration firms worldwide

Ranked by team size

Top 25 of 19,668 government systems integration firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to government systems integration firms: 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	Leidos	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	10001+	27,416 contacts →
	Partial evidence “Leidos is an industry and technology leader serving government & commercial customers with smarter, more efficient digital and mission innovations.” Source: RevenueBase Database · checked Sep 28, 2026
2	General Dynamics Information Technology	Indirect evidence	Falls Church, VA, United StatesHQ checked Sep 28, 2026	10001+	23,974 contacts →
	Indirect evidence “GDIT is a global technology and professional services company that delivers solutions, technology and mission services to every major agency across the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
3	Parsons Corporation	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	10001+	19,456 contacts →
	Indirect evidence “Founded in 1944, Parsons Corporation, a digitally enabled solutions provider, is focused on creating the future of the defense, intelligence, and critical infrastructure markets.” Source: RevenueBase Database · checked Sep 28, 2026
4	Peraton	Indirect evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	10001+	10,793 contacts →
	Indirect evidence “At Peraton, we're at the forefront of delivering the next big thing every day.” Source: RevenueBase Database · checked Sep 28, 2026
5	Mantech	Indirect evidence	Herndon, VA, United StatesHQ checked Sep 28, 2026	5,001-10,000	9,697 contacts →
	Indirect evidence “MANTECH is more than a technology company.” Source: RevenueBase Database · checked Sep 28, 2026
6	Tyler Technologies	Indirect evidence	Plano, TX, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,842 contacts →
	Indirect evidence “Tyler Technologies (NYSE: TYL) provides integrated software and technology services to the public sector.” Source: RevenueBase Database · checked Sep 28, 2026
7	Datacom	Indirect evidence	Auckland, New ZealandHQ checked Sep 28, 2026	5,001-10,000	5,958 contacts →
	Indirect evidence “Customer focused values.” Source: RevenueBase Database · checked Sep 28, 2026
8	Convergint	Partial evidence	Hoffman Estates, IL, United StatesHQ checked Sep 28, 2026	10001+	5,707 contacts →
	Partial evidence “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: RevenueBase Database · checked Sep 28, 2026
9	Cegeka	Indirect evidence	Hasselt, BelgiumHQ checked Sep 28, 2026	5,001-10,000	4,551 contacts →
	Indirect evidence “The digital world moves fast.” Source: RevenueBase Database · checked Sep 28, 2026
10	Asrc Federal	Indirect evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	5,001-10,000	4,542 contacts →
	Indirect evidence “ASRC Federal’s employees provide solutions for more than 30 U.S.” Source: RevenueBase Database · checked Sep 28, 2026
11	Carahsoft	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,945 contacts →
	Partial evidence “Carahsoft is The Trusted IT Solutions Provider®, supporting Federal, State, Local Government, Education, Healthcare and Private Sector industries.” Source: RevenueBase Database · checked Sep 28, 2026
12	Quest Software	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,206 contacts →
	Indirect evidence “At Quest Software, we help organizations build modern, trusted foundations for AI.” Source: RevenueBase Database · checked Sep 28, 2026
13	EJADA	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 28, 2026	1,001-5,000	3,050 contacts →
	Indirect evidence “ejada is a leading technology solutions provider in the Middle East and North Africa (MENA) region, headquartered in Saudi Arabia since 2005.” Source: RevenueBase Database · checked Sep 28, 2026
14	ATS Corporation	Indirect evidence	Cambridge, ON, CanadaHQ checked Sep 28, 2026	5,001-10,000	2,754 contacts →
	Indirect evidence “HELPING ADVANCE THE FUTURE ATS Corporation is an industry-leading automation solutions provider to many of the world's most successful companies.” Source: RevenueBase Database · checked Sep 28, 2026
15	Velocis Systems Private Limited	Partial evidence	Noida, IndiaHQ checked Sep 28, 2026	1,001-5,000	2,637 contacts →
	Partial evidence “As one of India’s leading system integrators, Velocis partners with organizations to turn technology into a catalyst for measurable business value.” Source: RevenueBase Database · checked Sep 28, 2026
16	LMI	Indirect evidence	Tysons, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,580 contacts →
	Indirect evidence “LMI is a new breed of digital solutions provider, disrupting the traditional govcon model with commercial-grade technology that is ready day-one.” Source: RevenueBase Database · checked Sep 28, 2026
17	Allied Digital	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	2,475 contacts →
	Partial evidence “Allied Digital Services is a globally recognized leader in Digital Transformation and a Master Systems Integrator, with over four decades of proven experience.” Source: RevenueBase Database · checked Sep 28, 2026
18	SVA System Vertrieb Alexander Gmbh	Partial evidence	Wiesbaden, GermanyHQ checked Sep 28, 2026	1,001-5,000	2,452 contacts →
	Partial evidence “Imprint: SVA is one of the leading system integrators in Germany.” Source: RevenueBase Database · checked Sep 28, 2026
19	CS Group	Indirect evidence	Le Plessis Robinson, FranceHQ checked Sep 28, 2026	5,001-10,000	2,092 contacts →
	Indirect evidence “Expert des systèmes critiques Conception, réalisation, déploiement & maintenance de systèmes critiques, basés sur des solutions et des produits innovants, garantissant…” Source: RevenueBase Database · checked Sep 28, 2026
20	Diyar United Company	Indirect evidence	Kuwait City, KuwaitHQ checked Sep 28, 2026	1,001-5,000	1,980 contacts →
	Indirect evidence “Since its inception in 1980, Diyar United has been in the business of providing innovative Information Technology solutions, products and services in state of Kuwait.” Source: RevenueBase Database · checked Sep 28, 2026
21	Giza Systems	Partial evidence	Cairo, EgyptHQ checked Sep 28, 2026	1,001-5,000	1,975 contacts →
	Partial evidence “pulse by solutions (formerly known as Giza Systems Group) is the trusted global force behind critical industries, deploying the Intelligence That Transforms to accelerate digital…” Source: RevenueBase Database · checked Sep 28, 2026
22	DCS Corp	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,898 contacts →
	Partial evidence “DCS delivers advanced technology and management solutions to Government agencies in the national security sector.” Source: RevenueBase Database · checked Sep 28, 2026
23	SOSI	Strong evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,859 contacts →
	Strong evidence “Founded in 1989 and headquartered in Reston, Virginia, SOSi is a private, founder-led defense and government solutions firm specializing in advanced technology systems and mission…” Source: RevenueBase Database · checked Sep 28, 2026
24	IES Communications	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,800 contacts →
	Indirect evidence “IES Communications a division of IES (NASDAQ: IESC) provides each client with a team of highly qualified dedicated professionals that deliver superior quality and cost effective…” Source: RevenueBase Database · checked Sep 28, 2026
25	Perspecta	Indirect evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	10001+	1,753 contacts →
	Indirect evidence “At Perspecta we question, we seek and we solve.” Source: RevenueBase Database · checked Sep 28, 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: government systems integration firms. 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 government systems integration firms.
Partial evidence: Its own public description names part of government systems integration firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name government systems integration firms. 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 19,668 government systems integration firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 168,424 reachable decision-makers.

Free signup · no credit card

View the full list →

Government systems integration firms worldwide at a glance

As of Sep 28, 2026

25.6%Verified-email coverage

33.4Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · Dubai

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

7,190

11-50

7,818

51-200

3,288

201-500

818

501-1,000

276

1,001-5,000

169

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 government systems integration firms, 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.
Coverage: Every country. Country and city lists for government systems integration firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “government systems integration firms”. 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 government systems integration firms), 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 government systems integration firms, and records with no verified work email.
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, 168,424 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 28, 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.

Government systems integration firms by location

141 lists · largest first

Every Government systems integration 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 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 government systems integration firms, 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 government systems integration firms are there worldwide?

RevenueBase identified 19,668 government systems integration firms worldwide 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?

Leidos, headquartered in Reston, tops this list with the largest team on record.

Which country has the most government systems integration firms?

The United States leads with 6,041 companies, followed by India (1,568) and Italy (577). Every government systems integration firms list by country and city is linked on this page.

Which city has the most government systems integration firms?

Dubai leads with 227 headquartered companies, followed by Washington (182) and Riyadh (155).

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 168,424 verified decision-maker contacts tracked across these 19,668 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 28, 2026.

Ready to reach these companies? Verified emails and direct dials for all 19,668 government systems integration 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 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.