Company lists · Data refreshed September 2026

Top 25 Infrastructure consulting firms based in the United States

Name: Infrastructure consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 10,033 companies tracked

RevenueBase identified 10,033 infrastructure consulting firms headquartered in the United States as of September 2026 and tracks 582,445 professional contacts across them, including 258,767 with verified work emails and 228,252 with mobile numbers. New York is the largest hub.

This list covers infrastructure consulting firms headquartered in the United States, 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review

10,033Companies

582,445Contacts tracked

258,767Verified emails

228,252Mobile numbers

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The 25 largest infrastructure consulting firms based in the United States

Ranked by team size

Top 25 of 10,033 infrastructure consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names infrastructure consulting firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	JacobsIndirect evidence	Dallas, TX, United StatesHQ checked Sep 3, 2026	10001+	46,472
	“At Jacobs, we're challenging today to reinvent tomorrow – delivering outcomes and solutions for the world's most complex challenges.” Source: company website · checked Sep 3, 2026
2	Bechtel CorporationIndirect evidence	Reston, VA, United StatesHQ checked Sep 3, 2026	10001+	24,784
	“Bechtel is a trusted engineering, construction and project management partner to industry and government.” Source: company website · checked Sep 3, 2026
3	KiewitIndirect evidence	Omaha, NE, United StatesHQ checked Sep 3, 2026	10001+	19,591
	“At Kiewit, the projects we deliver make a difference, and we offer opportunities for you to make one, too.” Source: company website · checked Sep 3, 2026
4	Tetra TechStrong evidence	Pasadena, CA, United StatesHQ checked Sep 3, 2026	10001+	13,066
	“Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.” Source: company website · checked Sep 3, 2026
5	Black & VeatchPartial evidence	Overland Park, KS, United StatesHQ checked Sep 3, 2026	10001+	10,807
	“Black & Veatch is an employee-owned, global leader in building critical human infrastructure in Energy, Water, Digital Connectivity and Government Services.” Source: company website · checked Sep 3, 2026
6	Kimley-HornPartial evidence	Raleigh, NC, United StatesHQ checked Sep 3, 2026	5,001-10,000	10,076
	“Kimley-Horn is one of the nation’s premier planning and design consulting firms.” Source: company website · checked Sep 3, 2026
7	WSP In The U.SIndirect evidence	New York, NY, United StatesHQ checked Sep 3, 2026	10001+	9,318
	“What if you could shape built and natural environments – and the future of those that use them?” Source: company website · checked Sep 3, 2026
8	URS Corporation, An Aecom CompanyIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 3, 2026	10001+	7,722
	“URS Corporation operations are now affiliated with AECOM.” Source: company website · checked Sep 3, 2026
9	CDM SmithIndirect evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	5,001-10,000	7,508
	“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: company website · checked Sep 3, 2026
10	HNTBPartial evidence	Kansas City, MO, United StatesHQ checked Sep 3, 2026	5,001-10,000	7,486
	“For over a century, HNTB has shaped the built environment with distinctive expertise across a full spectrum of infrastructure solutions.” Source: company website · checked Sep 3, 2026
11	TRC Companies, INCIndirect evidence	Windsor, CT, United StatesHQ checked Sep 3, 2026	5,001-10,000	7,018
	“TRC, a member of WSP, stands for adaptability.” Source: company website · checked Sep 3, 2026
12	TerraconPartial evidence	Olathe, CA, United StatesHQ checked Sep 3, 2026	5,001-10,000	6,024
	“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: company website · checked Sep 3, 2026
13	Bentley SystemsPartial evidence	Exton, AL, United StatesHQ checked Sep 3, 2026	5,001-10,000	5,252
	“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: company website · checked Sep 3, 2026
14	Michael Baker InternationalStrong evidence	Pittsburgh, PA, United StatesHQ checked Sep 3, 2026	5,001-10,000	4,316
	“Michael Baker International is a leading provider of engineering, consulting and technology services spanning four Verticals: Infrastructure, Integrated Design and Advisory (IDA)…” Source: company website · checked Sep 3, 2026
15	STVPartial evidence	New York, NC, United StatesHQ checked Sep 3, 2026	1,001-5,000	3,564
	“STV offers professional services for the infrastructure that powers our lives.” Source: company website · checked Sep 3, 2026
16	GolderIndirect evidence	Houston, TX, United States	5,001-10,000	3,183
	“Golder was acquired by WSP.” Source: company website · checked Sep 3, 2026
17	DewberryIndirect evidence	Fairfax, MS, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,794
	“Dewberry is a leading, market-facing firm with a proven history of providing professional services to a wide variety of public- and private-sector clients.” Source: company website · checked Sep 3, 2026
18	APTIMIndirect evidence	Baton Rouge, KS, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,644
	“APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.” Source: company website · checked Sep 3, 2026
19	Brown And CaldwellIndirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,455
	“Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Source: company website · checked Sep 3, 2026
20	Geosyntec ConsultantsPartial evidence	Boca Raton, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,392
	“Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Source: company website · checked Sep 3, 2026
21	KleinfelderIndirect evidence	San Diego, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,365
	“At Kleinfelder, we have been connecting great people to the best work since 1961.” Source: company website · checked Sep 3, 2026
22	VHBIndirect evidence	Watertown, NY, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,289
	“We are VHB.” Source: company website · checked Sep 3, 2026
23	The Haskell CompanyPartial evidence	Jacksonville, CO, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,255
	“Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Source: company website · checked Sep 3, 2026
24	ProvidencePartial evidence	Baton Rouge, WY, United StatesHQ checked Sep 3, 2026	n/a	2,242
	“Providence is an employee-owned engineering and environmental consulting firm.” Source: company website · checked Sep 3, 2026
25	KCIPartial evidence	Sparks, SC, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,228
	“KCI is a 100-percent employee-owned engineering, consulting and construction firm serving clients throughout the United States and beyond.” Source: company website · checked Sep 3, 2026

Showing 25 of 10,033 infrastructure consulting firms based in the United States

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Infrastructure consulting firms based in the United States at a glance

As of Sep 3, 2026

1-10Median size (employees)

New YorkLargest hub · 306 HQs

228,252Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

5,005

11-50

3,090

51-200

1,279

201-500

315

501-1,000

130

1,001-5,000

139

5,001-10,000

10001+

Verified emails by last verification

0–30

31–60

22,083

61–90

148,506

90–180

85,887

180+

2,291

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 consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “infrastructure consulting firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among infrastructure consulting firms, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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 an evidence 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, 258,767 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 3, 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 consulting firms by metro

Frequently asked

How many infrastructure consulting firms are there based in the United States?

RevenueBase identified 10,033 infrastructure consulting firms headquartered in the United States 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?

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

Which city has the most infrastructure consulting firms?

New York leads with 306 headquartered companies, followed by Houston (293) and Washington (158).

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 258,767 verified decision-maker contacts tracked across these 10,033 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 3, 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 SmartSearch, 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.