Company lists · Data refreshed September 2026

Top 25 Geoscience consulting firms based in Portland, United States

Name: Geoscience 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 28, 2026 51 companies tracked

RevenueBase identified 51 geoscience consulting firms headquartered in Portland, United States as of September 2026 and tracks 1,611 professional contacts across them, including 882 with verified work emails. Across the United States, Houston is the largest hub for this category (371 companies); Portland has 51.

This list covers geoscience 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 28, 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 28, 2026 86% judged on-target in blind review

51Companies

1,611Contacts tracked

882Verified emails

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

Ranked by team size

Top 25 of 51 geoscience consulting firms based in Portland, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to geoscience 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	David Evans And Associates, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	501-1,000	1,031 contacts →
	Indirect 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 28, 2026
2	Harper Houf Peterson Righellis INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	51-200	101 contacts →
	Indirect evidence “Founded in Portland, Oregon in 1990, Harper Houf Peterson Righellis Inc.” Source: RevenueBase Database · checked Sep 28, 2026
3	Whpacific, An Nv5 Company	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1,001-5,000	78 contacts →
	Indirect evidence “WHPacific was acquired by NV5 in July of 2019.” Source: RevenueBase Database · checked Sep 28, 2026
4	Mason, Bruce & Girard, Inc. Mb&g	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	51-200	77 contacts →
	Indirect evidence “Since 1921 Mason, Bruce & Girard, Inc.(MB & G) has provided forestry, environmental, and geospatial services to public and private clients.” Source: RevenueBase Database · checked Sep 28, 2026
5	GSI Water Solutions, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 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 28, 2026
6	Norwest Engineering INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 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 28, 2026
7	FB Environmental Associates	Indirect evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “Where Science Meets Civics" Our Mission: FB Environmental is dedicated to practical stewardship of our natural world.” Source: RevenueBase Database · checked Sep 28, 2026
8	Samara Group PDX	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	19 contacts →
	Indirect evidence “Samara Group LLC was founded to enhance environmental projects centered around rigorous science, inclusive partnerships, and effective communications.” Source: RevenueBase Database · checked Sep 28, 2026
9	FLO Analytics	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “We are an employee-owned consulting company with offices in Portland, OR and Seattle, WA.” Source: RevenueBase Database · checked Sep 28, 2026
10	Capital Search Network, INC	Indirect evidence	Portland, TX, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Executive Search Firm specializing in Petroleum Engineering, Geology, Land, Finance and Accounting professionals.” Source: RevenueBase Database · checked Sep 28, 2026
11	Soil Solutions Environmental Services	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Soil Solutions Environmental Services Inc.” Source: RevenueBase Database · checked Sep 28, 2026
12	Summit Water Resources	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	12 contacts →
	Indirect evidence “Summit Water Resources has more than 100 years of combined experience in the development of municipal, agricultural, and industrial groundwater supply, aquifer storage and…” Source: RevenueBase Database · checked Sep 28, 2026
13	Evren Northwest, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
14	Talbott Associates INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 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 28, 2026
15	Allstructure Engineering, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 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 28, 2026
16	Northwest Watersheds	Indirect evidence	Portland, United StatesHQ checked Sep 28, 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 28, 2026
17	Environmental Management Systems, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Environmental Management Systems, Inc.(EMS) Is a premier environmental consulting, engineering, and design firm headquartered in the Portland Metropolitan Area of Oregon.” Source: RevenueBase Database · checked Sep 28, 2026
18	Ehns Partners	Partial evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “EHNS Partners is a small dedicated team specializing in environmental, health, and safety consulting and engineering.” Source: RevenueBase Database · checked Sep 28, 2026
19	Greenfield Geotechnical LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Greenfield Geotechnical is an Emerging Small Business (No.” Source: RevenueBase Database · checked Sep 28, 2026
20	EES Environmental Consulting INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “EES is a unique team of professional consultants specializing in environmental assessment, investigation, and cleanup services.” Source: RevenueBase Database · checked Sep 28, 2026
21	NBT Solutions	Partial evidence	Portland, ME, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “NBT Solutions is a custom mapping systems consulting, design, and development group.” Source: RevenueBase Database · checked Sep 28, 2026
22	QW Consulting, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “At QW Consulting we provide innovative and economical solutions in response to clients’ information management, translation, systems support, and communication needs.” Source: RevenueBase Database · checked Sep 28, 2026
23	Aquarius Environmental, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Aquarius Environmental is an environmental engineering and consulting firm specializing in water related design, treatment, and compliance.” Source: RevenueBase Database · checked Sep 28, 2026
24	Lichen Land And Water INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
25	Gneiss Editing	Indirect evidence	Portland, OR, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Gneiss Editing is a full-service editing, writing and science communications firm.” Source: RevenueBase Database · checked Sep 28, 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: geoscience 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 geoscience consulting firms.
Partial evidence: Its own public description names part of geoscience consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name geoscience 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 51 geoscience consulting firms based in Portland, United States

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

As of Sep 28, 2026

54.7%Verified-email coverage

31.6Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 51 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 geoscience 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 “geoscience 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 geoscience 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 geoscience 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, 882 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 28, 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.

Geoscience 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 geoscience 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 geoscience consulting firms are there based in Portland, United States?

RevenueBase identified 51 geoscience 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?

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

Which city in the United States has the most geoscience consulting firms?

Houston leads the United States with 371 headquartered companies, followed by Denver (109) and Austin (78). Portland has 51.

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 882 verified decision-maker contacts tracked across these 51 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 28, 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.