Company lists · Data refreshed September 2026

Top 25 Transport consultancy firms based in the United States

Name: Transport consultancy 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 21, 2026 1,067 companies tracked

RevenueBase identified 1,067 transport consultancy firms headquartered in the United States as of September 2026 and tracks 53,684 professional contacts across them, including 24,759 with verified work emails. Houston is the largest hub.

This list covers transport consultancy 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 21, 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 21, 2026 86% judged on-target in blind review

1,067Companies

53,684Contacts tracked

24,759Verified emails

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The 25 largest transport consultancy firms based in the United States

Ranked by team size

Top 25 of 1,067 transport consultancy firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to transport consultancy 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	Ch2m	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 21, 2026	10001+	8,088 contacts →
	Indirect evidence “CH2M is now Jacobs.” Source: RevenueBase Database · checked Sep 21, 2026
2	Michael Baker International	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 21, 2026	5,001-10,000	4,362 contacts →
	Indirect 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 21, 2026
3	STV	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
4	VHB	Indirect evidence	Watertown, MA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,277 contacts →
	Indirect evidence “We are VHB.” Source: RevenueBase Database · checked Sep 21, 2026
5	GPI Greenman-Pedersen, INC	Indirect evidence	Melville, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,354 contacts →
	Indirect evidence “With a staff of over 1,800 professionals, Greenman-Pedersen, Inc.(GPI) is a leading engineering consulting firm that specializes in the innovative design and construction of…” Source: RevenueBase Database · checked Sep 21, 2026
6	Volkert, INC	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,199 contacts →
	Indirect evidence “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Source: RevenueBase Database · checked Sep 21, 2026
7	Moffatt & Nichol	Indirect evidence	Long Beach, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,178 contacts →
	Indirect evidence “Moffatt & Nichol is a leading U.S-based global infrastructure advisor specializing in the planning and design of facilities that shape and serve our coastlines, harbors and…” Source: RevenueBase Database · checked Sep 21, 2026
8	WSB	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Forge ahead.” Source: RevenueBase Database · checked Sep 21, 2026
9	GAI Consultants, INC	Partial evidence	Homestead, PA, United StatesHQ checked Sep 21, 2026	501-1,000	964 contacts →
	Partial evidence “Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…” Source: RevenueBase Database · checked Sep 21, 2026
10	Transystems	Partial evidence	Kansas City, MO, United StatesHQ checked Sep 21, 2026	1,001-5,000	850 contacts →
	Partial evidence “TranSystems plans, designs, and oversees construction to enhance the transportation networks and infrastructure that makes communities more livable today and in the future.” Source: RevenueBase Database · checked Sep 21, 2026
11	Hallcon Corporation	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	5,001-10,000	840 contacts →
	Partial evidence “Hallcon is a transportation and infrastructure services company focused on turnkey solutions for clients such as technology companies, manufacturers, railroads, universities…” Source: RevenueBase Database · checked Sep 21, 2026
12	DUDEK	Indirect evidence	Encinitas, CA, United StatesHQ checked Sep 21, 2026	501-1,000	795 contacts →
	Indirect evidence “Dudek is an environmental, planning, and engineering consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
13	Psomas	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	501-1,000	748 contacts →
	Indirect evidence “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Source: RevenueBase Database · checked Sep 21, 2026
14	Iteris, INC	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	201-500	530 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
15	Cobb, Fendley & Associates, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	501-1,000	524 contacts →
	Indirect evidence “Cobb, Fendley & Associates, Inc.(CobbFendley) is a nationally recognized infrastructure solutions firm with a regional focus and a commitment to excellence.” Source: RevenueBase Database · checked Sep 21, 2026
16	SRF Consulting Group	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	201-500	471 contacts →
	Partial evidence “SRF Consulting Group is a full-service consulting firm with a broad base of award-winning services, including- Transportation and Transit Planning - Community and Land Use…” Source: RevenueBase Database · checked Sep 21, 2026
17	Lockwood, Andrews & Newnam, Inc. LAN	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	201-500	461 contacts →
	Indirect evidence “Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.” Source: RevenueBase Database · checked Sep 21, 2026
18	Fehr & Peers	Partial evidence	Walnut Creek, CA, United StatesHQ checked Sep 21, 2026	201-500	448 contacts →
	Partial evidence “We are a transportation planning and engineering firm with 24 offices and over 400 staff nationwide.” Source: RevenueBase Database · checked Sep 21, 2026
19	Mccormick Taylor, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 2026	201-500	434 contacts →
	Indirect evidence “McCormick Taylor is a full-service civil engineering firm providing creative design, planning, and environmental solutions to the challenges of everyday life.” Source: RevenueBase Database · checked Sep 21, 2026
20	Infrastructure Consulting & Engineering	Partial evidence	West Columbia, SC, United StatesHQ checked Sep 21, 2026	501-1,000	425 contacts →
	Partial evidence “Founded in 2005, Infrastructure Consulting & Engineering, LLC (ICE) provides transportation consulting and engineering services across the Southeast.” Source: RevenueBase Database · checked Sep 21, 2026
21	Kittelson & Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 21, 2026	201-500	411 contacts →
	Partial evidence “We solve complex transportation problems to improve people's everyday lives.” Source: RevenueBase Database · checked Sep 21, 2026
22	Burns Engineering, INC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 21, 2026	201-500	401 contacts →
	Partial evidence “Burns is a nationally respected provider of specialized engineering services, bringing highly-technical, sought-after engineering expertise to transportation, critical…” Source: RevenueBase Database · checked Sep 21, 2026
23	Herbert, Rowland & Grubic, Inc. - HRG	Indirect evidence	Harrisburg, PA, United StatesHQ checked Sep 21, 2026	201-500	371 contacts →
	Indirect evidence “HRG assists with the planning, design, and management of community infrastructure.” Source: RevenueBase Database · checked Sep 21, 2026
24	Primera Engineers	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	201-500	362 contacts →
	Partial evidence “Primera Engineers is a mid-size, full-service, woman-owned (WBE) engineering design and consulting firm specializing in four areas of expertise: buildings, transportation…” Source: RevenueBase Database · checked Sep 21, 2026
25	Barton & Loguidice	Indirect evidence	Liverpool, NY, United StatesHQ checked Sep 21, 2026	201-500	355 contacts →
	Indirect evidence “Barton & Loguidice is a multidisciplinary consulting firm providing technical services to public and private clients.” Source: RevenueBase Database · checked Sep 21, 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: transport consultancy 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 transport consultancy firms.
Partial evidence: Its own public description names part of transport consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transport consultancy 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 1,067 transport consultancy firms based in the United States

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Transport consultancy firms based in the United States at a glance

As of Sep 21, 2026

46.1%Verified-email coverage

50.3Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

558

11-50

283

51-200

151

201-500

501-1,000

1,001-5,000

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 1,067 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 transport consultancy 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 “transport consultancy 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 transport consultancy 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 transport consultancy 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, 24,759 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 21, 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.

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 transport consultancy 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 transport consultancy firms are there based in the United States?

RevenueBase identified 1,067 transport consultancy 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?

Ch2m, headquartered in Englewood, tops this list with the largest team on record.

Which city has the most transport consultancy firms?

Houston leads with 24 headquartered companies, followed by New York (23) and Chicago (21).

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 24,759 verified decision-maker contacts tracked across these 1,067 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 21, 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.