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 company matches for geoscience consulting firms associated with 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 company matches for geoscience consulting firms associated with Portland, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

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 company matches for geoscience consulting firms based in Portland, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	David Evans And Associates, INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	501-1,000	1,031 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Harper Houf Peterson Righellis INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	51-200	101 contacts →
	Exact match “Founded in Portland, Oregon in 1990, Harper Houf Peterson Righellis Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Whpacific, An Nv5 Company	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1,001-5,000	78 contacts →
	Exact match “WHPacific was acquired by NV5 in July of 2019.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Mason, Bruce & Girard, Inc. Mb&g	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	51-200	77 contacts →
	Exact match “Since 1921 Mason, Bruce & Girard, Inc.(MB & G) has provided forestry, environmental, and geospatial services to public and private clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	GSI Water Solutions, INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	51-200	66 contacts →
	Exact match “GSI Water Solutions, Inc, is a specialized groundwater, environmental, and water resources consulting firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Norwest Engineering INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	51-200	41 contacts →
	Exact match “Norwest Engineering is a multi-disciplined, consulting engineering firm focused on developing long-standing relationships with our clients.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	FB Environmental Associates	Exact match	Portland, ME, United StatesHQ recorded Sep 28, 2026	11-50	28 contacts →
	Exact match “Where Science Meets Civics" Our Mission: FB Environmental is dedicated to practical stewardship of our natural world.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Samara Group PDX	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	19 contacts →
	Exact match “Samara Group LLC was founded to enhance environmental projects centered around rigorous science, inclusive partnerships, and effective communications.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	FLO Analytics	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	11-50	17 contacts →
	Exact match “We are an employee-owned consulting company with offices in Portland, OR and Seattle, WA.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Capital Search Network, INC	Exact match	Portland, TX, United StatesHQ recorded Sep 28, 2026	11-50	16 contacts →
	Exact match “Executive Search Firm specializing in Petroleum Engineering, Geology, Land, Finance and Accounting professionals.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Soil Solutions Environmental Services	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	11-50	16 contacts →
	Exact match “Soil Solutions Environmental Services Inc.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Summit Water Resources	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	12 contacts →
	Exact match “Summit Water Resources has more than 100 years of combined experience in the development of municipal, agricultural, and industrial groundwater supply, aquifer storage and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Evren Northwest, INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	11-50	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Talbott Associates INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	11-50	9 contacts →
	Exact match “Talbott Associates, Inc,(TAI) is a multi-disciplined consulting engineering firm, providing unbiased, independent professional opinions based upon sound engineering principles for…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Allstructure Engineering, LLC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	11-50	8 contacts →
	Exact match “Allstructure Engineering, LLC is a full service consulting Structural Engineering firm established in 2005.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Northwest Watersheds	Exact match	Portland, United StatesHQ recorded Sep 28, 2026	1-10	7 contacts →
	Exact match “Northwest Watersheds LLC provides water resources engineering services to protect communities, restore habitat, and provide climate resiliency.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Environmental Management Systems, INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	5 contacts →
	Exact match “Environmental Management Systems, Inc.(EMS) Is a premier environmental consulting, engineering, and design firm headquartered in the Portland Metropolitan Area of Oregon.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Ehns Partners	Exact match	Portland, ME, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “EHNS Partners is a small dedicated team specializing in environmental, health, and safety consulting and engineering.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Greenfield Geotechnical LLC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “Greenfield Geotechnical is an Emerging Small Business (No.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	EES Environmental Consulting INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “EES is a unique team of professional consultants specializing in environmental assessment, investigation, and cleanup services.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	NBT Solutions	Exact match	Portland, ME, United StatesHQ recorded Sep 28, 2026	1-10	4 contacts →
	Exact match “NBT Solutions is a custom mapping systems consulting, design, and development group.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	QW Consulting, LLC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “At QW Consulting we provide innovative and economical solutions in response to clients’ information management, translation, systems support, and communication needs.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Aquarius Environmental, LLC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	3 contacts →
	Exact match “Aquarius Environmental is an environmental engineering and consulting firm specializing in water related design, treatment, and compliance.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Lichen Land And Water INC	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Gneiss Editing	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1-10	2 contacts →
	Exact match “Gneiss Editing is a full-service editing, writing and science communications firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “geoscience consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 51 geoscience consulting firms based in Portland, United States

See the full list, filter by size, metro and specialty, and access 882 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Portland, United States whose business descriptions match “geoscience consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 882 professional contacts with verified work emails across the full matched dataset. 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.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Geoscience consulting firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “geoscience consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 51 company matches for geoscience consulting firms associated with Portland, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

David Evans And Associates, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

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

Houston leads the United States with 371 company records, 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 limited free results with 500 credits to start. Upgrading provides access to the 882 professional contacts with verified work emails tracked across these 51 companies; direct dials are available where recorded.

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 SmartSearch, 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.