Company lists · Data refreshed September 2026

Top 25 Rail transit design consultants based in the United States

Name: Rail transit design 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 17, 2026 844 companies tracked

RevenueBase identified 844 rail transit design consultants headquartered in the United States as of September 2026 and tracks 48,520 professional contacts across them, including 25,755 with verified work emails. Houston is the largest hub.

This list covers rail transit design 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 17, 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 17, 2026 86% judged on-target in blind review

844Companies

48,520Contacts tracked

25,755Verified emails

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The 25 largest rail transit design consultants based in the United States

Ranked by team size

Top 25 of 844 rail transit design consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to rail transit design 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	Michael Baker International	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 17, 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 17, 2026
2	LJA	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,932 contacts →
	Indirect evidence “Employee-Owned.” Source: RevenueBase Database · checked Sep 17, 2026
3	Bowman Consulting	Indirect evidence	Reston, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,666 contacts →
	Indirect evidence “Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…” Source: RevenueBase Database · checked Sep 17, 2026
4	CHA Consulting, INC	Partial evidence	Albany, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,639 contacts →
	Partial 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 17, 2026
5	GPI Greenman-Pedersen, INC	Partial evidence	Melville, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,354 contacts →
	Partial 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 17, 2026
6	Volkert, INC	Partial evidence	Mobile, AL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,199 contacts →
	Partial 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 17, 2026
7	WSB	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Forge ahead.” Source: RevenueBase Database · checked Sep 17, 2026
8	GAI Consultants, INC	Strong evidence	Homestead, PA, United StatesHQ checked Sep 17, 2026	501-1,000	964 contacts →
	Strong 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 17, 2026
9	Hatch Mott Macdonald	Indirect evidence	Iselin, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	762 contacts →
	Indirect evidence “This page is now closed.” Source: RevenueBase Database · checked Sep 17, 2026
10	Wade Trim	Indirect evidence	Detroit, MI, United StatesHQ checked Sep 17, 2026	501-1,000	758 contacts →
	Indirect evidence “At Wade Trim, we are committed to maximizing the value of your infrastructure investment.” Source: RevenueBase Database · checked Sep 17, 2026
11	Railworks Corporation	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	721 contacts →
	Strong evidence “RailWorks builds and maintains rail transportation infrastructure that keeps people and goods moving across the United States and Canada.” Source: RevenueBase Database · checked Sep 17, 2026
12	Barge Design Solutions	Partial evidence	Nashville, TN, United StatesHQ checked Sep 17, 2026	501-1,000	612 contacts →
	Partial evidence “Barge Design Solutions is a multidisciplinary, employee-owned engineering and architecture firm driven by a simple purpose: to improve the lives of our people, clients, and…” Source: RevenueBase Database · checked Sep 17, 2026
13	Whitman, Requardt And Associates, LLP	Indirect evidence	Baltimore, MD, United StatesHQ checked Sep 17, 2026	501-1,000	601 contacts →
	Indirect evidence “Established in 1915, WRA is a nationally-recognized engineering, architectural and environmental planning firm with a reputation for delivering exceptional work on time and within…” Source: RevenueBase Database · checked Sep 17, 2026
14	Neel-Schaffer, INC	Indirect evidence	Jackson, MS, United StatesHQ checked Sep 17, 2026	501-1,000	591 contacts →
	Indirect evidence “Neel-Schaffer is a multi-disciplined engineering, planning and construction management firm that was founded in 1983 and today is one of the largest private, employee-owned…” Source: RevenueBase Database · checked Sep 17, 2026
15	Cobb, Fendley & Associates, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 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 17, 2026
16	Cordoba Corporation	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 17, 2026	501-1,000	516 contacts →
	Partial evidence “CORDOBA CORPORATION is a California engineering, construction management, program management, and planning firm specializing in transportation, water, energy, education and…” Source: RevenueBase Database · checked Sep 17, 2026
17	Mark Thomas	Partial evidence	San Jose, CA, United StatesHQ checked Sep 17, 2026	501-1,000	489 contacts →
	Partial evidence “Mark Thomas provides planning, civil and structural engineering, construction management, land surveying, landscape architecture and urban design, and district management for…” Source: RevenueBase Database · checked Sep 17, 2026
18	Railpros	Strong evidence	Irving, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	481 contacts →
	Strong evidence “RailPros was founded in and is exclusively focused on providing rail and transit engineering and construction services.” Source: RevenueBase Database · checked Sep 17, 2026
19	SRF Consulting Group	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 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 17, 2026
20	Lockwood, Andrews & Newnam, Inc. LAN	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 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 17, 2026
21	Ayres Associates	Indirect evidence	Eau Claire, WI, United StatesHQ checked Sep 17, 2026	201-500	458 contacts →
	Indirect evidence “In 1959, Owen Ayres founded Ayres Associates atop a steadfast foundation of honesty, innovation, and good old-fashioned hard work – and a vision for a firm that revolved around…” Source: RevenueBase Database · checked Sep 17, 2026
22	RICK	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	201-500	446 contacts →
	Partial evidence “RICK is an award-winning planning, design, and engineering firm.” Source: RevenueBase Database · checked Sep 17, 2026
23	Ttl, INC	Partial evidence	Tuscaloosa, AL, United StatesHQ checked Sep 17, 2026	201-500	442 contacts →
	Partial evidence “Founded in 1964, TTL is an engineering design firm focused on delivering integrated infrastructure solutions for public and private clients.” Source: RevenueBase Database · checked Sep 17, 2026
24	Mccormick Taylor, INC	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 17, 2026	201-500	434 contacts →
	Partial 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 17, 2026
25	Kittelson & Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	201-500	411 contacts →
	Partial evidence “We solve complex transportation problems to improve people's everyday lives.” Source: RevenueBase Database · checked Sep 17, 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: rail transit design 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 rail transit design consultants.
Partial evidence: Its own public description names part of rail transit design consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name rail transit design 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 844 rail transit design consultants based in the United States

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Rail transit design consultants based in the United States at a glance

As of Sep 17, 2026

53.1%Verified-email coverage

57.5Average contacts per company

11-50Median size (employees)

2.8%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

318

11-50

289

51-200

161

201-500

501-1,000

1,001-5,000

5,001-10,000

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 844 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 rail transit design 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 “rail transit design 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 rail transit design 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 rail transit design 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, 25,755 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 17, 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 rail transit design 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 rail transit design consultants are there based in the United States?

RevenueBase identified 844 rail transit design 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?

Michael Baker International, headquartered in Pittsburgh, tops this list with the largest team on record.

Which city has the most rail transit design consultants?

Houston leads with 24 headquartered companies, followed by New York (24) and Chicago (19).

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 25,755 verified decision-maker contacts tracked across these 844 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 17, 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.