Company lists · Data refreshed September 2026

Top 23 Transportation engineering firms based in Portland, United States

Name: Transportation engineering firms based in Portland, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 31 companies tracked

RevenueBase identified 31 transportation engineering firms headquartered in Portland, United States as of September 2026 and tracks 2,548 professional contacts across them, including 1,458 with verified work emails. Houston is the largest hub.

This list covers transportation engineering firms headquartered in Portland, 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 19, 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 19, 2026 86% judged on-target in blind review

31Companies

2,548Contacts tracked

1,458Verified emails

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The 23 largest transportation engineering firms based in Portland, United States

Ranked by team size

Top 23 of 31 transportation engineering firms based in Portland, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to transportation engineering 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	David Evans And Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 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 19, 2026
2	Kittelson & Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	201-500	411 contacts →
	Partial evidence “We solve complex transportation problems to improve people's everyday lives.” Source: RevenueBase Database · checked Sep 19, 2026
3	OTAK	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	201-500	341 contacts →
	Indirect evidence “Otak values people, both those in our workplace and those that are impacted by the projects we undertake.” Source: RevenueBase Database · checked Sep 19, 2026
4	DKS Associates	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	51-200	192 contacts →
	Indirect evidence “Our work helps clients explore options, make sound decisions, and build a transformative future.” Source: RevenueBase Database · checked Sep 19, 2026
5	Quality Counts, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	51-200	118 contacts →
	Partial evidence “Quality Counts provides a variety of transportation data services to help guide infrastructure growth, improve network efficiency and make our communities better places to live…” Source: RevenueBase Database · checked Sep 19, 2026
6	Harper Houf Peterson Righellis INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	51-200	101 contacts →
	Indirect evidence “Founded in Portland, Oregon in 1990, Harper Houf Peterson Righellis Inc.” Source: RevenueBase Database · checked Sep 19, 2026
7	Whpacific, An Nv5 Company	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1,001-5,000	78 contacts →
	Indirect evidence “WHPacific was acquired by NV5 in July of 2019.” Source: RevenueBase Database · checked Sep 19, 2026
8	Vlmk Engineering Design	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	47 contacts →
	Partial evidence “Founded in 1971 in beautiful Portland, OR, VLMK Engineering + Design provides structural and civil engineering services for a variety of clients in the A/E/C and development…” Source: RevenueBase Database · checked Sep 19, 2026
9	Murraysmith	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	201-500	40 contacts →
	Partial evidence “In 2021, Murraysmith became Consor Engineers, integrating our decades of experience delivering high-quality water and transportation infrastructure projects for public agency…” Source: RevenueBase Database · checked Sep 19, 2026
10	Snyder Civil Engineering, LLC	Indirect evidence	Portland, CT, United StatesHQ checked Sep 19, 2026	11-50	33 contacts →
	Indirect evidence “Snyder Civil is a cohesive team of water system professionals based in central Connecticut.” Source: RevenueBase Database · checked Sep 19, 2026
11	Froelich Engineers	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	30 contacts →
	Partial evidence “Since 1983, Froelich Engineers has been delivering on-time, on-budget engineering services to leading owners, contractors, engineers, and developers across the country.” Source: RevenueBase Database · checked Sep 19, 2026
12	SFA Design Group, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “SFA Design Group, LLC is a structural engineering consulting company based out of Portland, Oregon, United States.” Source: RevenueBase Database · checked Sep 19, 2026
13	Safety Management Systems, LLC	Partial evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	1-10	16 contacts →
	Partial evidence “Transportation industry consulting services in the areas of process optimization, improvement, operational assessment, regulatory compliance programs and special projects.” Source: RevenueBase Database · checked Sep 19, 2026
14	Jarrett Walker Associates	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “Jarrett Walker + Associates was founded in 2011 by Jarrett Walker, the author of Human Transit, who has been a consulting expert in public transit planning and policy since 1993.” Source: RevenueBase Database · checked Sep 19, 2026
15	Humber Design Group, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	12 contacts →
	Partial evidence “Humber Design Group provides civil engineering design services for projects throughout the Pacific Northwest - large, small, complex, straightforward, urban, suburban, private…” Source: RevenueBase Database · checked Sep 19, 2026
16	Allstructure Engineering, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	11-50	8 contacts →
	Partial evidence “Allstructure Engineering, LLC is a full service consulting Structural Engineering firm established in 2005.” Source: RevenueBase Database · checked Sep 19, 2026
17	Curran-Mcleod, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Patrick D.” Source: RevenueBase Database · checked Sep 19, 2026
18	Lancaster Mobley	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “We foster strong relationships and employ the breadth of our trusted experience to forge safe, diverse, efficient, and smart transportation solutions.” Source: RevenueBase Database · checked Sep 19, 2026
19	urban.systems	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	3 contacts →
	Indirect evidence “As cities explore new transit systems, roads and utilities or modernize their aging infrastructure URBAN.SYSTEMS and it’s partners provide a range of civic engagement, financial…” Source: RevenueBase Database · checked Sep 19, 2026
20	Garnet Consulting, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Specialized transit technology, operations, and software consulting for rural, small urban, and intercity agencies and the organizations that serve them” Source: RevenueBase Database · checked Sep 19, 2026
21	DON Cushing Associates	Indirect evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “Providing general civil for architects, developers, cities.” Source: RevenueBase Database · checked Sep 19, 2026
22	RBT Consultants	Partial evidence	Portland, OR, United StatesHQ checked Sep 19, 2026	1-10	2 contacts →
	Partial evidence “Transportation Solutions Whether you need a traffic impact analysis for your development project or a comprehensive transportation demand management plan, RBT brings the resources…” Source: RevenueBase Database · checked Sep 19, 2026
23	Fair Dermody Consulting Engineers	Strong evidence	Portland, ME, United StatesHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “We specialize in heavy transportation infrastructure design and repair with concentrations in railroad, bridge, and marine engineering.” Source: RevenueBase Database · checked Sep 19, 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 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 transportation engineering firms.
Partial evidence: Its own public description names part of transportation engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transportation engineering 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 23 of 31 transportation engineering firms based in Portland, United States

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Transportation engineering firms based in Portland, United States at a glance

As of Sep 19, 2026

57.2%Verified-email coverage

82.2Average contacts per company

11-50Median size (employees)

390.3%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Portland, so it is reported there. Company counts and contact totals on this page are exact for Portland, over 31 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 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 Portland, United States whose own description of what they do matches “transportation engineering 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 transportation engineering 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 transportation engineering firms, and records with no verified work email. Companies headquartered outside Portland 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, 1,458 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 19, 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 firms by metro in the United States

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 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 transportation engineering firms are there based in Portland, United States?

RevenueBase identified 31 transportation engineering firms headquartered in Portland, 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?

David Evans And Associates, INC, headquartered in Portland, tops this list with the largest team on record.

Which city has the most transportation engineering firms?

Houston leads with 121 headquartered companies, followed by New York (86) and Austin (59).

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 1,458 verified decision-maker contacts tracked across these 31 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 19, 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.