Company lists · Data refreshed September 2026

Top 25 Infrastructure design companies based in Portland, United States

Name: Infrastructure design companies based in Portland, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 47 companies tracked

RevenueBase identified 47 infrastructure design companies headquartered in Portland, United States as of September 2026 and tracks 3,805 professional contacts across them, including 2,172 with verified work emails. Houston is the largest hub.

This list covers infrastructure design companies 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 20, 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 20, 2026 86% judged on-target in blind review

47Companies

3,805Contacts tracked

2,172Verified emails

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The 25 largest infrastructure design companies based in Portland, United States

Ranked by team size

Top 25 of 47 infrastructure design companies based in Portland, United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure design companies: 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	Woodard & Curran	Partial evidence	Portland, ME, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,060 contacts →
	Partial evidence “Woodard & Curran is more than just a consulting firm – we are an employee-owned integrated science, engineering, design-build, and operations company specializing in water and…” Source: RevenueBase Database · checked Sep 20, 2026
2	David Evans And Associates, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
3	Kittelson & Associates, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	201-500	411 contacts →
	Indirect evidence “We solve complex transportation problems to improve people's everyday lives.” Source: RevenueBase Database · checked Sep 20, 2026
4	OTAK	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
5	DKS Associates	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
6	Allied Engineering	Indirect evidence	Portland, ME, United StatesHQ checked Sep 20, 2026	11-50	135 contacts →
	Indirect evidence “Allied Engineering (AEI) is now Salas O'Brien.” Source: RevenueBase Database · checked Sep 20, 2026
7	Harper Houf Peterson Righellis INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	51-200	101 contacts →
	Indirect evidence “Founded in Portland, Oregon in 1990, Harper Houf Peterson Righellis Inc.” Source: RevenueBase Database · checked Sep 20, 2026
8	Whpacific, An Nv5 Company	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	1,001-5,000	78 contacts →
	Indirect evidence “WHPacific was acquired by NV5 in July of 2019.” Source: RevenueBase Database · checked Sep 20, 2026
9	Vlmk Engineering Design	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
10	Norwest Engineering INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	51-200	41 contacts →
	Indirect evidence “Norwest Engineering is a multi-disciplined, consulting engineering firm focused on developing long-standing relationships with our clients.” Source: RevenueBase Database · checked Sep 20, 2026
11	Murraysmith	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
12	Acorn Engineering, INC	Indirect evidence	Portland, ME, United StatesHQ checked Sep 20, 2026	11-50	34 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
13	Snyder Civil Engineering, LLC	Indirect evidence	Portland, CT, United StatesHQ checked Sep 20, 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 20, 2026
14	Froelich Engineers	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect 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 20, 2026
15	Peterson Structural Engineers, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	29 contacts →
	Indirect evidence “In 2026, PSE was acquired by Consor, a leading North American engineering and advisory firm.” Source: RevenueBase Database · checked Sep 20, 2026
16	Cascadia Partners	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	20 contacts →
	Partial evidence “Cascadia Partners are a multi-disciplinary team with decades of experience in planning, design, development finance, sustainability, project management, and community engagement.” Source: RevenueBase Database · checked Sep 20, 2026
17	Acms Northwest	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “ACMS Northwest is a Women-Owned construction management and civil engineering firm based in Portland, Oregon.” Source: RevenueBase Database · checked Sep 20, 2026
18	Jarrett Walker Associates	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
19	Waterleaf Architecture	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “Waterleaf has been active in the Northwest since 1952, focusing on four areas - commercial, transportation/industrial, medical/dental, and community.” Source: RevenueBase Database · checked Sep 20, 2026
20	Humber Design Group, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 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 20, 2026
21	Pioneer Design Group, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	11 contacts →
	Partial evidence “Pioneer Design Group, Inc, located in Portland, Oregon, provides civil engineering, land use planning, land surveying, landscape architecture and development services.” Source: RevenueBase Database · checked Sep 20, 2026
22	Stonewood Structural Engineers	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	1-10	10 contacts →
	Indirect evidence “At Stonewood Structural Engineers, we serve as either prime consultant or sub consultant on projects large and small, including commercial, retail, institutional, government and…” Source: RevenueBase Database · checked Sep 20, 2026
23	System Design Consultants, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “System Design Consultants, Inc.(SDC), is celebrating 35 years in the Portland design community, providing mechanical and electrical engineering services for commercial and…” Source: RevenueBase Database · checked Sep 20, 2026
24	T&m Design, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
25	Vega Civil Engineering, LLC	Indirect evidence	Portland, United StatesHQ checked Sep 20, 2026	1-10	8 contacts →
	Indirect evidence “Vega Civil Engineering, LLC, is a woman-owned company founded by Martha Williamson and Alex Wesolovski, in Portland, OR, during the Spring of 2019.” Source: RevenueBase Database · checked Sep 20, 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: infrastructure design companies. 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 infrastructure design companies.
Partial evidence: Its own public description names part of infrastructure design companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure design companies. 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 47 infrastructure design companies based in Portland, United States

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Infrastructure design companies based in Portland, United States at a glance

As of Sep 20, 2026

57.1%Verified-email coverage

81.0Average contacts per company

11-50Median size (employees)

395.7%Largest-city concentration · Houston

Sep 20, 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 47 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 infrastructure design companies, 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 “infrastructure design companies”. 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 infrastructure design companies), 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 infrastructure design companies, 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, 2,172 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 20, 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.

Infrastructure design companies 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 infrastructure design companies, 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 infrastructure design companies are there based in Portland, United States?

RevenueBase identified 47 infrastructure design companies 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?

Woodard & Curran, headquartered in Portland, tops this list with the largest team on record.

Which city has the most infrastructure design companies?

Houston leads with 186 headquartered companies, followed by New York (131) and Chicago (104).

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 2,172 verified decision-maker contacts tracked across these 47 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 20, 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.