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, its RevenueBase Smart Search rating, 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 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 RevenueBase Smart Search rating 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. RevenueBase Smart Search rates how each company's information relates to 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Jacobs	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 3, 2026	10001+	46,472 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 3, 2026
2	Bechtel Corporation	Indirect evidence	Reston, VA, United StatesHQ checked Sep 3, 2026	10001+	24,784 contacts →
	Indirect evidence “Bechtel is a trusted engineering, construction and project management partner to industry and government.” Source: RevenueBase Database · checked Sep 3, 2026
3	Kiewit	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 3, 2026	10001+	19,591 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 3, 2026
4	Tetra Tech	Strong evidence	Pasadena, CA, United StatesHQ checked Sep 3, 2026	10001+	13,066 contacts →
	Strong evidence “Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 3, 2026
5	Black & Veatch	Partial evidence	Overland Park, KS, United StatesHQ checked Sep 3, 2026	10001+	10,807 contacts →
	Partial evidence “Black & Veatch is an employee-owned, global leader in building critical human infrastructure in Energy, Water, Digital Connectivity and Government Services.” Source: RevenueBase Database · checked Sep 3, 2026
6	Kimley-Horn	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 3, 2026	5,001-10,000	10,076 contacts →
	Partial evidence “Kimley-Horn is one of the nation’s premier planning and design consulting firms.” Source: RevenueBase Database · checked Sep 3, 2026
7	WSP In The U.S	Indirect evidence	New York, NY, United StatesHQ checked Sep 3, 2026	10001+	9,318 contacts →
	Indirect evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 3, 2026
8	URS Corporation, An Aecom Company	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 3, 2026	10001+	7,722 contacts →
	Indirect evidence “URS Corporation operations are now affiliated with AECOM.” Source: RevenueBase Database · checked Sep 3, 2026
9	CDM Smith	Indirect evidence	Boston, MA, United StatesHQ checked Sep 3, 2026	5,001-10,000	7,508 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 3, 2026
10	HNTB	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 3, 2026	5,001-10,000	7,486 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 3, 2026
11	TRC Companies, INC	Indirect evidence	Windsor, CT, United StatesHQ checked Sep 3, 2026	5,001-10,000	7,018 contacts →
	Indirect evidence “TRC, a member of WSP, stands for adaptability.” Source: RevenueBase Database · checked Sep 3, 2026
12	Terracon	Partial evidence	Olathe, CA, United StatesHQ checked Sep 3, 2026	5,001-10,000	6,024 contacts →
	Partial evidence “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Source: RevenueBase Database · checked Sep 3, 2026
13	Bentley Systems	Partial evidence	Exton, AL, United StatesHQ checked Sep 3, 2026	5,001-10,000	5,252 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 3, 2026
14	Michael Baker International	Strong evidence	Pittsburgh, PA, United StatesHQ checked Sep 3, 2026	5,001-10,000	4,316 contacts →
	Strong evidence “Michael Baker International is a leading provider of engineering, consulting and technology services spanning four Verticals: Infrastructure, Integrated Design and Advisory (IDA)…” Source: RevenueBase Database · checked Sep 3, 2026
15	STV	Partial evidence	New York, NC, United StatesHQ checked Sep 3, 2026	1,001-5,000	3,564 contacts →
	Partial evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 3, 2026
16	Golder	Indirect evidence	Houston, TX, United States	5,001-10,000	3,183 contacts →
	Indirect evidence “Golder was acquired by WSP.” Source: RevenueBase Database · checked Sep 3, 2026
17	Dewberry	Indirect evidence	Fairfax, MS, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,794 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 3, 2026
18	APTIM	Indirect evidence	Baton Rouge, KS, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,644 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 3, 2026
19	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,455 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 3, 2026
20	Geosyntec Consultants	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,392 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 3, 2026
21	Kleinfelder	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,365 contacts →
	Indirect evidence “At Kleinfelder, we have been connecting great people to the best work since 1961.” Source: RevenueBase Database · checked Sep 3, 2026
22	VHB	Indirect evidence	Watertown, NY, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,289 contacts →
	Indirect evidence “We are VHB.” Source: RevenueBase Database · checked Sep 3, 2026
23	The Haskell Company	Partial evidence	Jacksonville, CO, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,255 contacts →
	Partial evidence “Haskell delivers over $3 billion annually in Architecture, Engineering, Construction (AEC) and Consulting solutions to assure certainty of outcome for complex capital projects…” Source: RevenueBase Database · checked Sep 3, 2026
24	Providence	Partial evidence	Baton Rouge, WY, United StatesHQ checked Sep 3, 2026	n/a	2,242 contacts →
	Partial evidence “Providence is an employee-owned engineering and environmental consulting firm.” Source: RevenueBase Database · checked Sep 3, 2026
25	KCI	Partial evidence	Sparks, SC, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,228 contacts →
	Partial evidence “KCI is a 100-percent employee-owned engineering, consulting and construction firm serving clients throughout the United States and beyond.” Source: RevenueBase Database · checked Sep 3, 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 consulting firms. 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 consulting firms.
Partial evidence: Its own public description names part of infrastructure consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure consulting firms. 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 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

44.4%Verified-email coverage

39.2%Mobile-number coverage

58.1Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · New York

Sep 3, 2026Page data 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+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

22,08331–60

148,50661–90

85,88790–180

2,291180+

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 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.
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.
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 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 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 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, 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

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 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 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 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.