Company lists · Data refreshed September 2026

Top 25 Railway infrastructure consulting firms worldwide

RevenueBase identified 24,737 railway infrastructure consulting firms worldwide as of September 2026 and tracks 893,611 professional contacts across them, including 247,285 with verified work emails. The United States is the largest market and London the largest hub.

This list covers railway infrastructure consulting 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 29, 2026. Country and city lists for railway infrastructure consulting 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 29, 2026 86% judged on-target in blind review
24,737Companies
893,611Contacts tracked
247,285Verified emails
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The 25 largest railway infrastructure consulting firms worldwide

Ranked by team size
Top 25 of 24,737 railway infrastructure consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to railway infrastructure consulting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceDallas, TX, United StatesHQ checked Sep 29, 202610001+63,914 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceMontreal, QC, CanadaHQ checked Sep 29, 202610001+22,733 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
3Partial evidenceSaint-quentin-en-yvelines, FranceHQ checked Sep 29, 202610001+11,641 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceEpsom, United KingdomHQ checked Sep 29, 202610001+9,297 contacts →

Indirect evidence

“Atkins is now AtkinsRéalis.”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceLondon, United KingdomHQ checked Sep 29, 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 29, 2026
6Partial evidenceMumbai, IndiaHQ checked Sep 29, 20265,001-10,0008,440 contacts →

Partial evidence

“Tata Consulting Engineers Limited (TCE) is the largest Indian private sector engineering and project consultancy and an emerging global leader in integrated engineering solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceEnglewood, CO, United StatesHQ checked Sep 29, 202610001+8,088 contacts →

Indirect evidence

“CH2M is now Jacobs.”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceKansas City, MO, United StatesHQ checked Sep 29, 20265,001-10,0007,469 contacts →

Partial evidence

“For over a century, HNTB has shaped the built environment with distinctive expertise across a full spectrum of infrastructure solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
9Partial evidenceVeera Desai Road, IndiaHQ checked Sep 29, 20261,001-5,0006,807 contacts →

Partial evidence

“Afcons is flagship infrastructure engineering & construction company of the Shapoorji Pallonji Group.”

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceOlathe, KS, United StatesHQ checked Sep 29, 20265,001-10,0006,113 contacts →

Partial evidence

“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.”

Source: RevenueBase Database · checked Sep 29, 2026
11Indirect evidenceDowntown, PolandHQ checked Sep 29, 20265,001-10,0005,792 contacts →

Indirect evidence

“Khatib & Alami (K&A) is a multidisciplinary design consultancy which operates primarily across the Middle East & Africa, Levant, Central and South-East Asia, and Europe.”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceNorth Sydney, AustraliaHQ checked Sep 29, 20265,001-10,0005,231 contacts →

Indirect evidence

“SMEC is a global engineering, management and development consultancy with a 70-year history of delivering advanced solutions on a global scale across urban development…”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceParis, FranceHQ checked Sep 29, 202610001+5,069 contacts →

Indirect evidence

“SYSTRA is one of the world's leading engineering and consultancy groups specialising in public transport and mobility solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
14Indirect evidenceKowloon Bay, Hong KongHQ checked Sep 29, 202610001+4,764 contacts →

Indirect evidence

“To Keep Cities Moving, MTR makes encounters happen and rendezvous for a more connected tomorrow.”

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceSaint-ouen, FranceHQ checked Sep 29, 20265,001-10,0004,612 contacts →

Indirect evidence

“Artelia is an international multidisciplinary consultancy, engineering and project management group specialising in mobility, water, energy, building and industry.”

Source: RevenueBase Database · checked Sep 29, 2026
16Strong evidencePittsburgh, PA, United StatesHQ checked Sep 29, 20265,001-10,0004,362 contacts →

Strong evidence

“Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceHailey, ID, United StatesHQ checked Sep 29, 20261,001-5,0004,013 contacts →

Indirect evidence

“POWER Engineers is now part of WSP.”

Source: RevenueBase Database · checked Sep 29, 2026
18Partial evidenceWan Chai, Hong KongHQ checked Sep 29, 202610001+3,843 contacts →

Partial evidence

“Established in 1974 and headquartered in Hong Kong, Leighton Asia delivers a portfolio of high-profile infrastructure projects throughout Asia.”

Source: RevenueBase Database · checked Sep 29, 2026
19Strong evidenceBeijing, ChinaHQ checked Sep 29, 20265,001-10,0003,835 contacts →

Strong evidence

“CHEC is focused on basic infrastructure construction, such as Marine Engineering, Dredging and Reclamation, Road and Bridge, Railways, Airports, Complete Plant, and other works.”

Source: RevenueBase Database · checked Sep 29, 2026
20Indirect evidenceMexicoHQ checked Sep 29, 202610001+3,752 contacts →

Indirect evidence

“Somos una empresa mexicana con 68 años de experiencia en brindar soluciones integrales a retos complejos de infraestructura.”

Source: RevenueBase Database · checked Sep 29, 2026
21Partial evidenceNew York, NY, United StatesHQ checked Sep 29, 20261,001-5,0003,556 contacts →

Partial evidence

“STV offers professional services for the infrastructure that powers our lives.”

Source: RevenueBase Database · checked Sep 29, 2026
22Indirect evidenceSandvika, NorwayHQ checked Sep 29, 20265,001-10,0003,555 contacts →

Indirect evidence

“Norconsult is a multidisciplinary engineering and design consultancy, providing services to clients in the public and private sectors worldwide.”

Source: RevenueBase Database · checked Sep 29, 2026
23Indirect evidenceLahore, PakistanHQ checked Sep 29, 20265,001-10,0003,266 contacts →

Indirect evidence

“NESPAK is Pakistan’s premier consultancy organization (established in 1973).”

Source: RevenueBase Database · checked Sep 29, 2026
24Indirect evidenceLaval, QC, CanadaHQ checked Sep 29, 20261,001-5,0003,252 contacts →

Indirect evidence

“CIMA+ fournit une gamme complète de services de génie-conseil partout au Canada.”

Source: RevenueBase Database · checked Sep 29, 2026
25Indirect evidenceCairo, EgyptHQ checked Sep 29, 20261,001-5,0003,138 contacts →

Indirect evidence

“With more than 57 years of engineering excellence, ECG is one of the leading multidisciplinary engineering consultancies in the Middle East and Africa.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 24,737 railway infrastructure consulting firms worldwide

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Railway infrastructure consulting firms worldwide at a glance

As of Sep 29, 2026
27.7%Verified-email coverage
36.1Average contacts per company
11-50Median size (employees)
1.2%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
10,783
11-50
8,076
51-200
3,648
201-500
1,150
501-1,000
437
1,001-5,000
395
5,001-10,000
68
10001+
72

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 railway infrastructure consulting 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 railway infrastructure consulting firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “railway infrastructure consulting 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 railway infrastructure consulting 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 railway infrastructure consulting 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, 247,285 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 29, 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.

Railway infrastructure consulting firms by location

120 lists · largest first

Every Railway infrastructure 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 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 railway infrastructure consulting 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 railway infrastructure consulting firms are there worldwide?

RevenueBase identified 24,737 railway infrastructure consulting 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?

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

Which country has the most railway infrastructure consulting firms?

The United States leads with 1,930 companies, followed by India (1,814) and the United Kingdom (1,654). Every railway infrastructure consulting firms list by country and city is linked on this page.

Which city has the most railway infrastructure consulting firms?

London leads with 303 headquartered companies, followed by Sao Paulo (264) and Tehran (189).

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 247,285 verified decision-maker contacts tracked across these 24,737 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 29, 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.