Company lists · Data refreshed September 2026

Top 25 Transportation engineering companies based in the United States

Name: Transportation engineering companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 4,545 companies tracked

RevenueBase identified 4,545 transportation engineering companies headquartered in the United States as of September 2026 and tracks 486,821 professional contacts across them, including 198,424 with verified work emails. Houston is the largest hub.

This list covers transportation engineering companies 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 16, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

4,545Companies

486,821Contacts tracked

198,424Verified emails

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The 25 largest transportation engineering companies based in the United States

Ranked by team size

Top 25 of 4,545 transportation engineering companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to transportation engineering 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	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 16, 2026	10001+	63,914 contacts →
	Indirect evidence “AECOM is the global infrastructure leader, committed to delivering a better world.” Source: RevenueBase Database · checked Sep 16, 2026
2	Bechtel Corporation	Partial evidence	Reston, VA, United StatesHQ checked Sep 16, 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 16, 2026
3	Kiewit	Indirect evidence	Omaha, NE, United StatesHQ checked Sep 16, 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 16, 2026
4	Tetra Tech	Partial evidence	Pasadena, CA, United StatesHQ checked Sep 16, 2026	10001+	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 16, 2026
5	Burns & Mcdonnell	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 16, 2026	10001+	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 16, 2026
6	Black & Veatch	Indirect evidence	Overland Park, KS, United StatesHQ checked Sep 16, 2026	10001+	10,851 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
7	WSP In The U.S	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 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 16, 2026
8	Ch2m	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 16, 2026	10001+	8,088 contacts →
	Indirect evidence “CH2M is now Jacobs.” Source: RevenueBase Database · checked Sep 16, 2026
9	URS Corporation, An Aecom Company	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 16, 2026	10001+	7,706 contacts →
	Indirect evidence “URS Corporation operations are now affiliated with AECOM.” Source: RevenueBase Database · checked Sep 16, 2026
10	CDM Smith	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	5,001-10,000	7,527 contacts →
	Partial 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 16, 2026
11	HNTB	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 16, 2026	5,001-10,000	7,469 contacts →
	Indirect 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 16, 2026
12	Terracon	Partial evidence	Olathe, KS, United StatesHQ checked Sep 16, 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 16, 2026
13	Granite Construction	Indirect evidence	Watsonville, CA, United StatesHQ checked Sep 16, 2026	5,001-10,000	4,567 contacts →
	Indirect evidence “From infrastructure that facilitates the movement of goods and people to projects that improve the way we live, work, and play, high-value partnerships power our projects and fuel…” Source: RevenueBase Database · checked Sep 16, 2026
14	Michael Baker International	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 16, 2026	5,001-10,000	4,362 contacts →
	Partial 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 16, 2026
15	Clark Construction Group	Indirect evidence	United StatesHQ checked Sep 16, 2026	1,001-5,000	4,223 contacts →
	Indirect evidence “Clark Construction Group is one of the largest building and infrastructure companies in the United States.” Source: RevenueBase Database · checked Sep 16, 2026
16	Balfour Beatty US	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 16, 2026	1,001-5,000	3,578 contacts →
	Indirect evidence “Balfour Beatty US is an industry-leading provider of general contracting, at-risk construction management and design-build services for public and private sector clients across…” Source: RevenueBase Database · checked Sep 16, 2026
17	STV	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 2026	1,001-5,000	3,556 contacts →
	Indirect evidence “STV offers professional services for the infrastructure that powers our lives.” Source: RevenueBase Database · checked Sep 16, 2026
18	Mastec	Indirect evidence	Coral Gables, FL, United StatesHQ checked Sep 16, 2026	10001+	3,163 contacts →
	Indirect evidence “MasTec companies have been involved in some of the largest and most complex infrastructure construction projects across the country.” Source: RevenueBase Database · checked Sep 16, 2026
19	TYLIN	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	3,067 contacts →
	Partial evidence “As a global engineering firm, we design infrastructure solutions that connect and elevate communities.” Source: RevenueBase Database · checked Sep 16, 2026
20	Dewberry	Indirect evidence	Fairfax, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,795 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 16, 2026
21	Brown And Caldwell	Indirect evidence	Walnut Creek, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,473 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 16, 2026
22	Geosyntec Consultants	Partial evidence	Boca Raton, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,393 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 16, 2026
23	Kleinfelder	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,344 contacts →
	Indirect evidence “At Kleinfelder, we have been connecting great people to the best work since 1961.” Source: RevenueBase Database · checked Sep 16, 2026
24	VHB	Indirect evidence	Watertown, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,277 contacts →
	Indirect evidence “We are VHB.” Source: RevenueBase Database · checked Sep 16, 2026
25	ECS Group Of Companies	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,210 contacts →
	Partial evidence “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Source: RevenueBase Database · checked Sep 16, 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: transportation engineering 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 transportation engineering companies.
Partial evidence: Its own public description names part of transportation engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transportation engineering 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 4,545 transportation engineering companies based in the United States

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Transportation engineering companies based in the United States at a glance

As of Sep 16, 2026

40.8%Verified-email coverage

107.1Average contacts per company

11-50Median size (employees)

2.7%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

1,588

11-50

1,535

51-200

888

201-500

256

501-1,000

124

1,001-5,000

110

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,545 companies.

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 transportation engineering 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “transportation engineering 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 transportation engineering 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 transportation engineering companies, 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, 198,424 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 16, 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.

Transportation engineering companies 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 transportation engineering 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 transportation engineering companies are there based in the United States?

RevenueBase identified 4,545 transportation engineering companies 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?

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

Which city has the most transportation engineering companies?

Houston leads with 122 headquartered companies, followed by New York (87) and Dallas (71).

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 198,424 verified decision-maker contacts tracked across these 4,545 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 16, 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.