Company lists · Data refreshed September 2026

Top 25 Infrastructure design companies worldwide

Name: Infrastructure design companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 42,068 companies tracked

RevenueBase identified 42,068 infrastructure design companies worldwide as of September 2026 and tracks 2,193,393 professional contacts across them, including 687,923 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers infrastructure design companies 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 20, 2026. Country and city lists for infrastructure design companies 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 20, 2026 86% judged on-target in blind review

42,068Companies

2,193,393Contacts tracked

687,923Verified emails

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The 25 largest infrastructure design companies worldwide

Ranked by team size

Top 25 of 42,068 infrastructure design companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure design companies: 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	AECOM	Partial evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	10001+	63,914 contacts →
	Partial evidence “AECOM is the global infrastructure leader, committed to delivering a better world.” Source: RevenueBase Database · checked Sep 20, 2026
2	Jacobs	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	10001+	46,351 contacts →
	Indirect evidence “At Jacobs, we're challenging today to reinvent tomorrow – delivering outcomes and solutions for the world's most complex challenges.” Source: RevenueBase Database · checked Sep 20, 2026
3	Saipem	Partial evidence	Milan, ItalyHQ checked Sep 20, 2026	10001+	34,095 contacts →
	Partial evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 20, 2026
4	Arcadis	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 20, 2026	10001+	33,846 contacts →
	Indirect evidence “Arcadis is a leading global partner, delivering transformative projects with businesses, cities and industries.” Source: RevenueBase Database · checked Sep 20, 2026
5	Stantec	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 20, 2026	10001+	28,416 contacts →
	Indirect evidence “Stantec empowers clients, people, and communities to rise to the world’s greatest challenges at a time when the world faces more unprecedented concerns than ever before.” Source: RevenueBase Database · checked Sep 20, 2026
6	Bechtel Corporation	Indirect evidence	Reston, VA, United StatesHQ checked Sep 20, 2026	10001+	25,068 contacts →
	Indirect evidence “Bechtel is a trusted engineering, construction and project management partner to industry and government.” Source: RevenueBase Database · checked Sep 20, 2026
7	Atkinsréalis	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	10001+	22,733 contacts →
	Indirect evidence “We are a world-class engineering services and nuclear organization.” Source: RevenueBase Database · checked Sep 20, 2026
8	WSP	Partial evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	10001+	20,382 contacts →
	Partial evidence “WSP is one of the world’s leading engineering, science and infrastructure solutions firms, uniting its multidisciplinary expertise to shape communities to advance humanity.” Source: RevenueBase Database · checked Sep 20, 2026
9	Kiewit	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 20, 2026	10001+	19,465 contacts →
	Indirect evidence “At Kiewit, the projects we deliver make a difference, and we offer opportunities for you to make one, too.” Source: RevenueBase Database · checked Sep 20, 2026
10	Mott Macdonald	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	10001+	19,072 contacts →
	Indirect evidence “We are an engineering, management and development consultancy and one of the largest wholly employee-owned firms of our kind.” Source: RevenueBase Database · checked Sep 20, 2026
11	SWECO	Partial evidence	Stockholm, SwedenHQ checked Sep 20, 2026	10001+	18,445 contacts →
	Partial evidence “Sweco is at the heart of the green transition - planning and designing the sustainable communities and cities of the future.” Source: RevenueBase Database · checked Sep 20, 2026
12	Ramboll	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 20, 2026	10001+	15,715 contacts →
	Indirect evidence “Ramboll is a global architecture, engineering and consultancy company founded in Denmark in 1945.” Source: RevenueBase Database · checked Sep 20, 2026
13	HDR	Partial evidence	Omaha, NE, United StatesHQ checked Sep 20, 2026	10001+	15,269 contacts →
	Partial evidence “HDR is an employee-owned design firm specializing in engineering, architecture, environmental and construction services.” Source: RevenueBase Database · checked Sep 20, 2026
14	GHD	Indirect evidence	Sydney, AustraliaHQ checked Sep 20, 2026	10001+	14,572 contacts →
	Indirect evidence “We are committed to addressing the world’s biggest challenges in the areas of water, energy and communities.” Source: RevenueBase Database · checked Sep 20, 2026
15	Tata Projects	Indirect evidence	Mumbai, IndiaHQ checked Sep 20, 2026	1,001-5,000	14,384 contacts →
	Indirect evidence “Tata Projects is one of the most admired Technology led Engineering, Procurement and Construction (EPC) companies in India.” Source: RevenueBase Database · checked Sep 20, 2026
16	Tetra Tech	Partial evidence	Pasadena, CA, United StatesHQ checked Sep 20, 2026	10001+	12,999 contacts →
	Partial evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
17	AFRY	Partial evidence	Stockholm, SwedenHQ checked Sep 20, 2026	10001+	12,850 contacts →
	Partial evidence “AFRY is a European leader in engineering, design, and advisory services, with a global reach.” Source: RevenueBase Database · checked Sep 20, 2026
18	Burns & Mcdonnell	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	10001+	12,497 contacts →
	Partial evidence “At Burns & McDonnell, our engineers, construction professionals, architects, planners, technologists and scientists do more than plan, design and construct.” Source: RevenueBase Database · checked Sep 20, 2026
19	EGIS	Indirect evidence	Saint-quentin-en-yvelines, FranceHQ checked Sep 20, 2026	10001+	11,641 contacts →
	Indirect evidence “Egis is a leading global architectural, consulting, construction engineering, operations and mobility services firm.” Source: RevenueBase Database · checked Sep 20, 2026
20	KEC International LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 20, 2026	5,001-10,000	10,868 contacts →
	Partial evidence “KEC International Limited, the flagship company of RPG Enterprises is a diversified global infrastructure Engineering, Procurement & Construction (EPC) major, with a presence in…” Source: RevenueBase Database · checked Sep 20, 2026
21	Black & Veatch	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 20, 2026	10001+	10,851 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
22	DAR	Partial evidence	Beirut, LebanonHQ checked Sep 20, 2026	10001+	10,822 contacts →
	Partial evidence “Dar is one of the world’s leading consultancies, providing design, planning, engineering, sustainability consulting, digital solutions and services, project management, and…” Source: RevenueBase Database · checked Sep 20, 2026
23	Downer	Indirect evidence	North Ryde, AustraliaHQ checked Sep 20, 2026	10001+	10,666 contacts →
	Indirect evidence “Enabling communities to thrive.” Source: RevenueBase Database · checked Sep 20, 2026
24	Balfour Beatty PLC	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	10001+	10,507 contacts →
	Partial evidence “Balfour Beatty is a leading international infrastructure group.” Source: RevenueBase Database · checked Sep 20, 2026
25	Kimley-Horn	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 20, 2026	5,001-10,000	10,117 contacts →
	Partial evidence “Kimley-Horn is one of the nation’s premier planning and design consulting firms.” Source: RevenueBase Database · checked Sep 20, 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: infrastructure design companies. 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 infrastructure design companies.
Partial evidence: Its own public description names part of infrastructure design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure design companies. 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 42,068 infrastructure design companies worldwide

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Infrastructure design companies worldwide at a glance

As of Sep 20, 2026

31.4%Verified-email coverage

52.1Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Sao Paulo

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

16,884

11-50

14,311

51-200

6,498

201-500

2,195

501-1,000

875

1,001-5,000

789

5,001-10,000

136

10001+

191

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 infrastructure design companies, 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 infrastructure design companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “infrastructure design companies”. 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 infrastructure design companies), 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 infrastructure design companies, 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, 687,923 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 20, 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.

Infrastructure design companies by location

178 lists · largest first

Every Infrastructure design companies 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 infrastructure design companies, 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 infrastructure design companies are there worldwide?

RevenueBase identified 42,068 infrastructure design companies 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?

AECOM, headquartered in Dallas, tops this list with the largest team on record.

Which country has the most infrastructure design companies?

The United States leads with 7,222 companies, followed by Brazil (2,909) and India (2,775). Every infrastructure design companies list by country and city is linked on this page.

Which city has the most infrastructure design companies?

Sao Paulo leads with 449 headquartered companies, followed by Tehran (276) and London (265).

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 687,923 verified decision-maker contacts tracked across these 42,068 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 20, 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.