Company lists · Data refreshed September 2026

Top 25 Infrastructure engineering staffing companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 48,898 companies tracked

RevenueBase identified 48,898 infrastructure engineering staffing companies worldwide as of September 2026 and tracks 1,597,702 professional contacts across them, including 420,826 with verified work emails. The United States is the largest market and London the largest hub.

This list covers infrastructure engineering staffing 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 28, 2026. Country and city lists for infrastructure engineering staffing 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 28, 2026 86% judged on-target in blind review

48,898Companies

1,597,702Contacts tracked

420,826Verified emails

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The 25 largest infrastructure engineering staffing companies worldwide

Ranked by team size

Top 25 of 48,898 infrastructure engineering staffing companies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure engineering staffing 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 28, 2026	10001+	63,914 contacts →
	Partial evidence “AECOM is the global infrastructure leader, committed to delivering a better world.” Source: RevenueBase Database · checked Sep 28, 2026
2	Saipem	Strong evidence	Milan, ItalyHQ checked Sep 28, 2026	10001+	34,095 contacts →
	Strong 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 28, 2026
3	Stantec	Indirect evidence	Edmonton, AB, CanadaHQ checked Sep 28, 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 28, 2026
4	Bechtel Corporation	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	10001+	25,068 contacts →
	Partial evidence “Bechtel is a trusted engineering, construction and project management partner to industry and government.” Source: RevenueBase Database · checked Sep 28, 2026
5	Atkinsréalis	Partial evidence	Montreal, QC, CanadaHQ checked Sep 28, 2026	10001+	22,733 contacts →
	Partial evidence “We are a world-class engineering services and nuclear organization.” Source: RevenueBase Database · checked Sep 28, 2026
6	Kiewit	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 28, 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 28, 2026
7	Tata Projects	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	14,384 contacts →
	Partial evidence “Tata Projects is one of the most admired Technology led Engineering, Procurement and Construction (EPC) companies in India.” Source: RevenueBase Database · checked Sep 28, 2026
8	Tetra Tech	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 28, 2026	10001+	12,999 contacts →
	Strong 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 28, 2026
9	KEC International LTD	Strong evidence	Mumbai, IndiaHQ checked Sep 28, 2026	5,001-10,000	10,868 contacts →
	Strong 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 28, 2026
10	Black & Veatch	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 28, 2026	10001+	10,851 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
11	Snc-Lavalin	Indirect evidence	Montreal, QC, CanadaHQ checked Sep 28, 2026	10001+	9,992 contacts →
	Indirect evidence “SNC Lavalin is now AtkinsRéalis.” Source: RevenueBase Database · checked Sep 28, 2026
12	Techint Engineering & Construction	Partial evidence	Ciudad De Buenos Aires, ArgentinaHQ checked Sep 28, 2026	10001+	9,509 contacts →
	Partial evidence “Techint Engineering & Construction provides project management, engineering, procurement and construction services on a global basis for large-scale projects in the Oil & Gas…” Source: RevenueBase Database · checked Sep 28, 2026
13	Atkins	Indirect evidence	Epsom, United KingdomHQ checked Sep 28, 2026	10001+	9,297 contacts →
	Indirect evidence “Atkins is now AtkinsRéalis.” Source: RevenueBase Database · checked Sep 28, 2026
14	Tata Consulting Engineers	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	5,001-10,000	8,440 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 28, 2026
15	Laing O'rourke	Strong evidence	North Sydney, United KingdomHQ checked Sep 28, 2026	10001+	8,215 contacts →
	Strong evidence “Laing O’Rourke is a global engineering and manufacturing-led construction leader, delivering state-of-the-art infrastructure and buildings projects in the UK, Australia and the…” Source: RevenueBase Database · checked Sep 28, 2026
16	URS Corporation, An Aecom Company	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	10001+	7,706 contacts →
	Indirect evidence “URS Corporation operations are now affiliated with AECOM.” Source: RevenueBase Database · checked Sep 28, 2026
17	CDM Smith	Indirect evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	5,001-10,000	7,527 contacts →
	Indirect evidence “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
18	HNTB	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 28, 2026	5,001-10,000	7,469 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 28, 2026
19	Afcons Infrastructure Limited	Strong evidence	Veera Desai Road, IndiaHQ checked Sep 28, 2026	1,001-5,000	6,807 contacts →
	Strong evidence “Afcons is flagship infrastructure engineering & construction company of the Shapoorji Pallonji Group.” Source: RevenueBase Database · checked Sep 28, 2026
20	Terracon	Partial evidence	Olathe, KS, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,113 contacts →
	Partial evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 28, 2026
21	Webuild	Partial evidence	Rozzano (mi), ItalyHQ checked Sep 28, 2026	10001+	5,966 contacts →
	Partial evidence “Webuild is a global leader in the construction of large, complex infrastructure, with a focus on sustainable mobility, hydropower, water treatment and supply, and green buildings.” Source: RevenueBase Database · checked Sep 28, 2026
22	Bentley Systems	Partial evidence	Exton, PA, United StatesHQ checked Sep 28, 2026	5,001-10,000	5,230 contacts →
	Partial evidence “Around the world, infrastructure professionals rely on software from Bentley Systems to help them design, build, and operate better and more resilient infrastructure for…” Source: RevenueBase Database · checked Sep 28, 2026
23	Concremat Engenharia E Tecnologia	Indirect evidence	São Paulo, BrazilHQ checked Sep 28, 2026	1,001-5,000	5,154 contacts →
	Indirect evidence “Desde 2017 a Concremat atua como plataforma integradora de negócios para a China Communication Construction conectando a América Latina a uma rede global de especialistas.” Source: RevenueBase Database · checked Sep 28, 2026
24	Tradesmen International	Indirect evidence	Macedonia, OH, United StatesHQ checked Sep 28, 2026	10001+	4,999 contacts →
	Indirect evidence “Founded in 1992, Tradesmen International is North America’s premier resource for proven skilled craftsmen and labor consulting services.” Source: RevenueBase Database · checked Sep 28, 2026
25	Michael Baker International	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 28, 2026	5,001-10,000	4,362 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 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: infrastructure engineering staffing 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 engineering staffing companies.
Partial evidence: Its own public description names part of infrastructure engineering staffing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure engineering staffing 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 48,898 infrastructure engineering staffing companies worldwide

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Infrastructure engineering staffing companies worldwide at a glance

As of Sep 28, 2026

26.3%Verified-email coverage

32.7Average contacts per company

11-50Median size (employees)

1.6%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

20,807

11-50

15,918

51-200

7,585

201-500

2,466

501-1,000

910

1,001-5,000

761

5,001-10,000

113

10001+

128

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 engineering staffing 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 engineering staffing companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “infrastructure engineering staffing 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 engineering staffing 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 engineering staffing 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, 420,826 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.

Infrastructure engineering staffing companies by location

221 lists · largest first

Every Infrastructure engineering staffing 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 engineering staffing 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 engineering staffing companies are there worldwide?

RevenueBase identified 48,898 infrastructure engineering staffing 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 engineering staffing companies?

The United States leads with 9,325 companies, followed by India (3,633) and the United Kingdom (3,625). Every infrastructure engineering staffing companies list by country and city is linked on this page.

Which city has the most infrastructure engineering staffing companies?

London leads with 767 headquartered companies, followed by Sao Paulo (525) and Houston (320).

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 420,826 verified decision-maker contacts tracked across these 48,898 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.

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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.