Company lists · Data refreshed September 2026

Top 25 Transport consultants based in the United States

Name: Transport consultants 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 1,709 companies tracked

RevenueBase identified 1,709 transport consultants headquartered in the United States as of September 2026 and tracks 179,089 professional contacts across them, including 75,608 with verified work emails. New York is the largest hub.

This list covers transport consultants 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

1,709Companies

179,089Contacts tracked

75,608Verified emails

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The 25 largest transport consultants based in the United States

Ranked by team size

Top 25 of 1,709 transport consultants 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 consultants: 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 21, 2026	10001+	63,914 contacts →
	Indirect evidence “AECOM is the global infrastructure leader, committed to delivering a better world.” Source: RevenueBase Database · checked Sep 21, 2026
2	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
3	URS Corporation, An Aecom Company	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	10001+	7,706 contacts →
	Indirect evidence “URS Corporation operations are now affiliated with AECOM.” Source: RevenueBase Database · checked Sep 21, 2026
4	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
5	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
6	First Transit	Indirect evidence	Lombard, IL, United StatesHQ checked Sep 21, 2026	10001+	2,611 contacts →
	Indirect evidence “First Transit was acquired in 2023 and is now Transdev.” Source: RevenueBase Database · checked Sep 21, 2026
7	Kleinfelder	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 21, 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 21, 2026
8	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
9	KCI	Indirect evidence	Sparks, NC, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,207 contacts →
	Indirect 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 21, 2026
10	Olsson	Indirect evidence	Lincoln, NE, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,108 contacts →
	Indirect evidence “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Source: RevenueBase Database · checked Sep 21, 2026
11	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 21, 2026
12	JMT	Indirect evidence	Serving Clients Across The Us, MD, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,688 contacts →
	Indirect evidence “Johnson, Mirmiran & Thompson is an employee owned, multi-disciplined firm offering a full array of planning, design, and construction phase consulting services for infrastructure…” Source: RevenueBase Database · checked Sep 21, 2026
13	Rk&k	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,641 contacts →
	Indirect evidence “RK & K is a full-service planning, engineering, environmental, and construction management/inspection firm serving a wide range of clients throughout the United States.” Source: RevenueBase Database · checked Sep 21, 2026
14	CHA Consulting, INC	Indirect evidence	Albany, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,639 contacts →
	Indirect evidence “CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…” Source: RevenueBase Database · checked Sep 21, 2026
15	Freese And Nichols	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,496 contacts →
	Indirect evidence “Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Source: RevenueBase Database · checked Sep 21, 2026
16	Davey Resource Group, INC	Indirect evidence	Kent, OH, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,395 contacts →
	Indirect evidence “Davey Resource Group, Inc.(DRG) provides innovative consulting and field services that support utility infrastructure and environmental stewardship.” Source: RevenueBase Database · checked Sep 21, 2026
17	Mead & Hunt	Indirect evidence	Middleton, WI, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,355 contacts →
	Indirect evidence “Mead & Hunt provides clients with expert planning, architecture design, engineering, environmental and construction administration services across a wide variety of market…” Source: RevenueBase Database · checked Sep 21, 2026
18	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
19	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
20	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
21	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
22	David Evans And Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 21, 2026	501-1,000	1,031 contacts →
	Partial evidence “Since its founding in 1976 in Portland, Oregon, DEA has become a recognized leader for progressive and sustainable design and management solutions for complex transportation, land…” Source: RevenueBase Database · checked Sep 21, 2026
23	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
24	SEH	Indirect evidence	St. Paul, MN, United StatesHQ checked Sep 21, 2026	501-1,000	929 contacts →
	Indirect evidence “Let's show the world what we can do together.” Source: RevenueBase Database · checked Sep 21, 2026
25	Parametrix	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 21, 2026	501-1,000	880 contacts →
	Indirect evidence “At Parametrix, we help our clients imagine what's possible.” 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 consultants. 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 consultants.
Partial evidence: Its own public description names part of transport consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transport consultants. 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 1,709 transport consultants based in the United States

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Transport consultants based in the United States at a glance

As of Sep 21, 2026

42.2%Verified-email coverage

104.8Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

832

11-50

467

51-200

256

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 1,709 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 consultants, 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 consultants”. 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 consultants), 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 consultants, 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, 75,608 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.

Transport consultants 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 transport consultants, 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 consultants are there based in the United States?

RevenueBase identified 1,709 transport consultants 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 transport consultants?

New York leads with 48 headquartered companies, followed by Houston (43) and Chicago (31).

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 75,608 verified decision-maker contacts tracked across these 1,709 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.