Company lists · Data refreshed September 2026

Top 25 Transport consultancies based in the United States

RevenueBase identified 2,250 transport consultancies headquartered in the United States as of September 2026 and tracks 222,525 professional contacts across them, including 98,191 with verified work emails. New York is the largest hub.

This list covers transport consultancies 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
2,250Companies
222,525Contacts tracked
98,191Verified emails
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The 25 largest transport consultancies based in the United States

Ranked by team size
Top 25 of 2,250 transport consultancies 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 consultancies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceDallas, TX, United StatesHQ checked Sep 21, 202610001+63,914 contacts →

Indirect evidence

“AECOM is the global infrastructure leader, committed to delivering a better world.”

Source: RevenueBase Database · checked Sep 21, 2026
2Indirect evidenceDallas, TX, United StatesHQ checked Sep 21, 202610001+46,351 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 21, 2026
3Indirect evidenceNew York, NY, United StatesHQ checked Sep 21, 202610001+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 21, 2026
4Indirect evidencePittsburgh, PA, United StatesHQ checked Sep 21, 20265,001-10,0004,362 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
5Indirect evidenceNew York, NY, United StatesHQ checked Sep 21, 20261,001-5,0003,556 contacts →

Indirect evidence

“STV offers professional services for the infrastructure that powers our lives.”

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceWatertown, MA, United StatesHQ checked Sep 21, 20261,001-5,0002,277 contacts →

Indirect evidence

“We are VHB.”

Source: RevenueBase Database · checked Sep 21, 2026
7Indirect evidenceChantilly, VA, United StatesHQ checked Sep 21, 20261,001-5,0002,210 contacts →

Indirect evidence

“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.”

Source: RevenueBase Database · checked Sep 21, 2026
8Indirect evidenceLincoln, NE, United StatesHQ checked Sep 21, 20261,001-5,0002,108 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
9Indirect evidenceHouston, TX, United StatesHQ checked Sep 21, 20261,001-5,0001,932 contacts →

Indirect evidence

“Employee-Owned.”

Source: RevenueBase Database · checked Sep 21, 2026
10Indirect evidenceServing Clients Across The Us, MD, United StatesHQ checked Sep 21, 20261,001-5,0001,688 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
11Indirect evidenceAlbany, NY, United StatesHQ checked Sep 21, 20261,001-5,0001,639 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
12Indirect evidenceKent, OH, United StatesHQ checked Sep 21, 20261,001-5,0001,395 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
13Indirect evidenceMelville, NY, United StatesHQ checked Sep 21, 20261,001-5,0001,354 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
14Indirect evidenceMobile, AL, United StatesHQ checked Sep 21, 20261,001-5,0001,199 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
15Indirect evidenceMinneapolis, MN, United StatesHQ checked Sep 21, 20261,001-5,0001,053 contacts →

Indirect evidence

“Forge ahead.”

Source: RevenueBase Database · checked Sep 21, 2026
16Partial evidencePortland, OR, United StatesHQ checked Sep 21, 2026501-1,0001,031 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
17Indirect evidenceHomestead, PA, United StatesHQ checked Sep 21, 2026501-1,000964 contacts →

Indirect 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
18Indirect evidenceSeattle, WA, United StatesHQ checked Sep 21, 2026501-1,000880 contacts →

Indirect evidence

“At Parametrix, we help our clients imagine what's possible.”

Source: RevenueBase Database · checked Sep 21, 2026
19Indirect evidenceEncinitas, CA, United StatesHQ checked Sep 21, 2026501-1,000795 contacts →

Indirect evidence

“Dudek is an environmental, planning, and engineering consulting firm.”

Source: RevenueBase Database · checked Sep 21, 2026
20Indirect evidenceDe Pere, WI, United StatesHQ checked Sep 21, 2026501-1,000781 contacts →

Indirect evidence

“By combining science, engineering, and technology with a true collaborative spirit, Foth has delivered innovative solutions to our clients since 1938.”

Source: RevenueBase Database · checked Sep 21, 2026
21Indirect evidenceIselin, NJ, United StatesHQ checked Sep 21, 20261,001-5,000762 contacts →

Indirect evidence

“This page is now closed.”

Source: RevenueBase Database · checked Sep 21, 2026
22Indirect evidenceDetroit, MI, United StatesHQ checked Sep 21, 2026501-1,000758 contacts →

Indirect evidence

“At Wade Trim, we are committed to maximizing the value of your infrastructure investment.”

Source: RevenueBase Database · checked Sep 21, 2026
23Indirect evidenceLos Angeles, CA, United StatesHQ checked Sep 21, 2026501-1,000748 contacts →

Indirect evidence

“Our award-winning projects are produced through innovation, creativity, and technical expertise.”

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceKenmore, WA, United StatesHQ checked Sep 21, 2026501-1,000718 contacts →

Indirect evidence

“MSV International Inc.(ISO 9001 : 2015 Certified Company) is a multidisciplinary consultancy firm and is registered as a corporation in the State of Washington, USA.”

Source: RevenueBase Database · checked Sep 21, 2026
25Indirect evidenceMelville, NY, United StatesHQ checked Sep 21, 2026501-1,000692 contacts →

Indirect evidence

“About H2M H2M architects + engineers is a multi-disciplinary professional consulting and design firm, proud of its long history of client service and consistent ability to meet…”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 2,250 transport consultancies based in the United States

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Transport consultancies based in the United States at a glance

As of Sep 21, 2026
44.1%Verified-email coverage
98.9Average contacts per company
1-10Median size (employees)
2.4%Largest-city concentration · New York
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
1,179
11-50
624
51-200
294
201-500
77
501-1,000
34
1,001-5,000
26
5,001-10,000
6
10001+
8

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 2,250 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 consultancies, 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 consultancies”. 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 consultancies), 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 consultancies, 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, 98,191 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 consultancies, 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 consultancies are there based in the United States?

RevenueBase identified 2,250 transport consultancies 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 consultancies?

New York leads with 55 headquartered companies, followed by Houston (54) and Miami (42).

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 98,191 verified decision-maker contacts tracked across these 2,250 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.