Company lists · Data refreshed September 2026

Top 25 Geotechnical consulting firms based in Portland, United States

Name: Geotechnical consulting 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 14, 2026 42 companies tracked

RevenueBase identified 42 geotechnical consulting firms headquartered in Portland, United States as of September 2026 and tracks 570 professional contacts across them, including 301 with verified work emails. Houston is the largest hub.

This list covers geotechnical consulting 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 14, 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 14, 2026 86% judged on-target in blind review

42Companies

570Contacts tracked

301Verified emails

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The 25 largest geotechnical consulting firms based in Portland, United States

Ranked by team size

Top 25 of 42 geotechnical consulting firms based in Portland, United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to geotechnical consulting 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	Harper Houf Peterson Righellis INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	51-200	101 contacts →
	Indirect evidence “Founded in Portland, Oregon in 1990, Harper Houf Peterson Righellis Inc.” Source: RevenueBase Database · checked Sep 14, 2026
2	Whpacific, An Nv5 Company	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1,001-5,000	78 contacts →
	Indirect evidence “WHPacific was acquired by NV5 in July of 2019.” Source: RevenueBase Database · checked Sep 14, 2026
3	GSI Water Solutions, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	51-200	66 contacts →
	Partial evidence “GSI Water Solutions, Inc, is a specialized groundwater, environmental, and water resources consulting firm.” Source: RevenueBase Database · checked Sep 14, 2026
4	Vlmk Engineering Design	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	11-50	47 contacts →
	Indirect 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 14, 2026
5	Norwest Engineering INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	51-200	41 contacts →
	Partial evidence “Norwest Engineering is a multi-disciplined, consulting engineering firm focused on developing long-standing relationships with our clients.” Source: RevenueBase Database · checked Sep 14, 2026
6	Froelich Engineers	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 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 14, 2026
7	Peterson Structural Engineers, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 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 14, 2026
8	SFA Design Group, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 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 14, 2026
9	Vista Structural Engineering, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	14 contacts →
	Indirect evidence “Vista Structural Engineering can help you complete any of the following projects: New Construction (Residential, Light Commercial) Addition to Existing Construction (Residential…” Source: RevenueBase Database · checked Sep 14, 2026
10	WDY Structural & Civil Engineers	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	11-50	11 contacts →
	Indirect evidence “Structural and Civil Engineering Solutions” Source: RevenueBase Database · checked Sep 14, 2026
11	Talbott Associates INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	11-50	9 contacts →
	Partial evidence “Talbott Associates, Inc,(TAI) is a multi-disciplined consulting engineering firm, providing unbiased, independent professional opinions based upon sound engineering principles for…” Source: RevenueBase Database · checked Sep 14, 2026
12	Allstructure Engineering, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 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 14, 2026
13	Northwest Watersheds	Indirect evidence	Portland, United StatesHQ checked Sep 14, 2026	1-10	7 contacts →
	Indirect evidence “Northwest Watersheds LLC provides water resources engineering services to protect communities, restore habitat, and provide climate resiliency.” Source: RevenueBase Database · checked Sep 14, 2026
14	Base Design Group, INC	Partial evidence	Portland, ME, United StatesHQ checked Sep 14, 2026	11-50	7 contacts →
	Partial evidence “BASE DESIGN GROUP is a full-service structural engineering consulting firm providing design, analysis and evaluation of buildings and special structures throughout the northeast…” Source: RevenueBase Database · checked Sep 14, 2026
15	Strata Design LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	7 contacts →
	Partial evidence “Our experienced geotechnical engineering team at Strata Design is proud celebrate 10 years of continuous growth in providing innovate and timely solutions for site development.” Source: RevenueBase Database · checked Sep 14, 2026
16	Arris Consulting	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	6 contacts →
	Partial evidence “Arris Consulting was formed in 2019 by Brian Butler and Andrew Craig in Portland, OR and in 2021 brought Shane Fitzpatrick on as plumbing principal.” Source: RevenueBase Database · checked Sep 14, 2026
17	Thornton Tomasetti Becker Structural Engineers, INC	Indirect evidence	Portland, ME, United StatesHQ checked Sep 14, 2026	11-50	4 contacts →
	Indirect evidence “Becker Structural Engineers was founded in 1994.” Source: RevenueBase Database · checked Sep 14, 2026
18	Abht Structural Engineers	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	11-50	4 contacts →
	Partial evidence “ABHT Structural Engineers is a full service structural consulting firm located in Portland, Oregon.” Source: RevenueBase Database · checked Sep 14, 2026
19	Greenfield Geotechnical LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	4 contacts →
	Partial evidence “Greenfield Geotechnical is an Emerging Small Business (No.” Source: RevenueBase Database · checked Sep 14, 2026
20	Madden & Baughman Engineering, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Partial evidence “Madden & Baughman Engineering is a structural engineering and consulting firm that focuses on high design in the pursuit of architectural accomplishment and economy since 2005.” Source: RevenueBase Database · checked Sep 14, 2026
21	James G. Pierson INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	3 contacts →
	Indirect evidence “Formed in 1945 as Pierson & Tidball, the firm originally provided Civil/Structural and Mechanical Engineering.” Source: RevenueBase Database · checked Sep 14, 2026
22	DON Cushing Associates	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Indirect evidence “Providing general civil for architects, developers, cities.” Source: RevenueBase Database · checked Sep 14, 2026
23	E-Pur	Partial evidence	Portland, United StatesHQ checked Sep 14, 2026	1-10	2 contacts →
	Partial evidence “E-PUR provides client-focused hydrologic, geologic, engineering, and environmental consulting services on a wide range of water resource and water supply projects.” Source: RevenueBase Database · checked Sep 14, 2026
24	Hyatt Geosciences, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Partial evidence “Hyatt GeoSciences LLC (HGS) is an employee-owned consulting firm with over 20 years of experience providing client-focused geology and hydrogeology services for environmental…” Source: RevenueBase Database · checked Sep 14, 2026
25	Cascade Trenchless Consulting	Indirect evidence	Portland, OR, United StatesHQ checked Sep 14, 2026	1-10	1 contacts →
	Indirect evidence “Delivering custom-fit trenchless solutions from concept through construction.” Source: RevenueBase Database · checked Sep 14, 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: geotechnical consulting 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 geotechnical consulting firms.
Partial evidence: Its own public description names part of geotechnical consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geotechnical consulting 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 25 of 42 geotechnical consulting firms based in Portland, United States

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Geotechnical consulting firms based in Portland, United States at a glance

As of Sep 14, 2026

52.8%Verified-email coverage

13.6Average contacts per company

1-10Median size (employees)

452.4%Largest-city concentration · Houston

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 42 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 geotechnical consulting 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 “geotechnical consulting 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 geotechnical consulting 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 geotechnical consulting 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, 301 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 14, 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.

Geotechnical consulting 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 geotechnical consulting 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 geotechnical consulting firms are there based in Portland, United States?

RevenueBase identified 42 geotechnical consulting 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?

Harper Houf Peterson Righellis INC, headquartered in Portland, tops this list with the largest team on record.

Which city has the most geotechnical consulting firms?

Houston leads with 190 headquartered companies, followed by New York (104) and Austin (77).

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 301 verified decision-maker contacts tracked across these 42 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 14, 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.