Company lists · Data refreshed September 2026

Top 25 Infrastructure advisory consultants worldwide

RevenueBase identified 44,034 infrastructure advisory consultants worldwide as of September 2026 and tracks 1,939,523 professional contacts across them, including 664,442 with verified work emails. The United States is the largest market and London the largest hub.

This list covers infrastructure advisory consultants 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 21, 2026. Country and city lists for infrastructure advisory consultants 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 21, 2026 86% judged on-target in blind review
44,034Companies
1,939,523Contacts tracked
664,442Verified emails
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The 25 largest infrastructure advisory consultants worldwide

Ranked by team size
Top 25 of 44,034 infrastructure advisory consultants worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure advisory consultants: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceDallas, TX, United StatesHQ checked Sep 21, 202610001+63,914 contacts →

Partial evidence

“AECOM is the global infrastructure leader, committed to delivering a better world.”

Source: RevenueBase Database · checked Sep 21, 2026
2Indirect evidenceDallas, TX, United StatesHQ checked Sep 21, 202610001+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 21, 2026
3Indirect evidenceAmsterdam, NetherlandsHQ checked Sep 21, 202610001+33,846 contacts →

Indirect evidence

“Arcadis is a leading global partner, delivering transformative projects with businesses, cities and industries.”

Source: RevenueBase Database · checked Sep 21, 2026
4Indirect evidenceEdmonton, AB, CanadaHQ checked Sep 21, 202610001+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 21, 2026
5Indirect evidenceAberdeen, United KingdomHQ checked Sep 21, 202610001+26,949 contacts →

Indirect evidence

“Wood is a global leader in consulting and engineering, delivering critical solutions across energy and materials markets.”

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceReston, VA, United StatesHQ checked Sep 21, 202610001+25,068 contacts →

Indirect evidence

“Bechtel is a trusted engineering, construction and project management partner to industry and government.”

Source: RevenueBase Database · checked Sep 21, 2026
7Indirect evidenceMontreal, QC, CanadaHQ checked Sep 21, 202610001+22,733 contacts →

Indirect evidence

“We are a world-class engineering services and nuclear organization.”

Source: RevenueBase Database · checked Sep 21, 2026
8Indirect evidenceLondon, United KingdomHQ checked Sep 21, 202610001+21,018 contacts →

Indirect evidence

“We guide, plan and design the future of the built environment.”

Source: RevenueBase Database · checked Sep 21, 2026
9Partial evidenceMontreal, QC, CanadaHQ checked Sep 21, 202610001+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 21, 2026
10Indirect evidenceOmaha, NE, United StatesHQ checked Sep 21, 202610001+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 21, 2026
11Partial evidenceLondon, United KingdomHQ checked Sep 21, 202610001+19,072 contacts →

Partial 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 21, 2026
12Indirect evidenceStockholm, SwedenHQ checked Sep 21, 202610001+18,445 contacts →

Indirect 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 21, 2026
13Partial evidenceCopenhagen, DenmarkHQ checked Sep 21, 202610001+15,715 contacts →

Partial evidence

“Ramboll is a global architecture, engineering and consultancy company founded in Denmark in 1945.”

Source: RevenueBase Database · checked Sep 21, 2026
14Indirect evidenceSydney, AustraliaHQ checked Sep 21, 202610001+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 21, 2026
15Partial evidencePasadena, CA, United StatesHQ checked Sep 21, 202610001+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 21, 2026
16Partial evidenceStockholm, SwedenHQ checked Sep 21, 202610001+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 21, 2026
17Indirect evidenceKansas City, MO, United StatesHQ checked Sep 21, 202610001+12,497 contacts →

Indirect 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 21, 2026
18Indirect evidenceSaint-quentin-en-yvelines, FranceHQ checked Sep 21, 202610001+11,641 contacts →

Indirect evidence

“Egis is a leading global architectural, consulting, construction engineering, operations and mobility services firm.”

Source: RevenueBase Database · checked Sep 21, 2026
19Indirect evidenceOverland Park, KS, United StatesHQ checked Sep 21, 202610001+10,851 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 21, 2026
20Partial evidenceBeirut, LebanonHQ checked Sep 21, 202610001+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 21, 2026
21Indirect evidenceNorth Ryde, AustraliaHQ checked Sep 21, 202610001+10,666 contacts →

Indirect evidence

“Enabling communities to thrive.”

Source: RevenueBase Database · checked Sep 21, 2026
22Indirect evidenceRaleigh, NC, United StatesHQ checked Sep 21, 20265,001-10,00010,117 contacts →

Indirect evidence

“Kimley-Horn is one of the nation’s premier planning and design consulting firms.”

Source: RevenueBase Database · checked Sep 21, 2026
23Indirect evidenceMontreal, QC, CanadaHQ checked Sep 21, 202610001+9,992 contacts →

Indirect evidence

“SNC Lavalin is now AtkinsRéalis.”

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceEpsom, United KingdomHQ checked Sep 21, 202610001+9,297 contacts →

Indirect evidence

“Atkins is now AtkinsRéalis.”

Source: RevenueBase Database · checked Sep 21, 2026
25Indirect evidenceLondon, United KingdomHQ checked Sep 21, 20265,001-10,0008,458 contacts →

Indirect evidence

“Mace Consult launched as a new and independent business on 5 March 2026, through a carve-out from Mace Group.”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 44,034 infrastructure advisory consultants worldwide

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Infrastructure advisory consultants worldwide at a glance

As of Sep 21, 2026
34.3%Verified-email coverage
44.0Average contacts per company
11-50Median size (employees)
1.3%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
21,595
11-50
14,066
51-200
5,252
201-500
1,583
501-1,000
576
1,001-5,000
542
5,001-10,000
97
10001+
141

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 advisory consultants, 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 advisory consultants are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “infrastructure advisory consultants”. 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 advisory consultants), 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 advisory consultants, 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, 664,442 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 21, 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 advisory consultants by location

198 lists · largest first

Every Infrastructure advisory consultants 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 advisory consultants, 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 advisory consultants are there worldwide?

RevenueBase identified 44,034 infrastructure advisory consultants 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 advisory consultants?

The United States leads with 7,099 companies, followed by Brazil (2,643) and India (2,267). Every infrastructure advisory consultants list by country and city is linked on this page.

Which city has the most infrastructure advisory consultants?

London leads with 554 headquartered companies, followed by Sao Paulo (473) and Paris (328).

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 664,442 verified decision-maker contacts tracked across these 44,034 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 21, 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.