Company lists · Data refreshed September 2026

Top 24 Environmental consultancy firms based in Portland, United States

Name: Environmental consultancy 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 12, 2026 44 companies tracked

RevenueBase identified 44 environmental consultancy firms headquartered in Portland, United States as of September 2026 and tracks 311 professional contacts across them, including 160 with verified work emails and 165 with mobile numbers. Houston is the largest hub.

This list covers environmental consultancy 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 12, 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 12, 2026 86% judged on-target in blind review

44Companies

311Contacts tracked

160Verified emails

165Mobile numbers

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The 24 largest environmental consultancy firms based in Portland, United States

Ranked by team size

Top 24 of 44 environmental consultancy firms based in Portland, United States, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to environmental consultancy 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	GSI Water Solutions, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 12, 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 12, 2026
2	Brightworks Sustainability	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	51-200	61 contacts →
	Indirect evidence “Recognized for advanced subject matter expertise, wide-ranging technical resources, creative problem-solving, and excellence in professional practice, Brightworks Sustainability…” Source: RevenueBase Database · checked Sep 12, 2026
3	FB Environmental Associates	Partial evidence	Portland, ME, United StatesHQ checked Sep 12, 2026	11-50	28 contacts →
	Partial evidence “Where Science Meets Civics" Our Mission: FB Environmental is dedicated to practical stewardship of our natural world.” Source: RevenueBase Database · checked Sep 12, 2026
4	Cascadia Partners	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	11-50	20 contacts →
	Indirect 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 12, 2026
5	Samara Group PDX	Partial evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	19 contacts →
	Partial evidence “Samara Group LLC was founded to enhance environmental projects centered around rigorous science, inclusive partnerships, and effective communications.” Source: RevenueBase Database · checked Sep 12, 2026
6	Evren Northwest, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
7	Triplewin Advisory	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	8 contacts →
	Indirect evidence “Everyone is too aware of the dangers of ignoring sustainability, but are you aware of the range of advantages in a proper sustainability strategy?” Source: RevenueBase Database · checked Sep 12, 2026
8	Environmental Management Systems, INC	Partial evidence	Portland, OR, United StatesHQ checked Sep 12, 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 12, 2026
9	Ehns Partners	Partial evidence	Portland, ME, United StatesHQ checked Sep 12, 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 12, 2026
10	Northwest Energy Collaborative	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	4 contacts →
	Indirect evidence “Northwest Energy Collaborative is a Green Building Consulting Firm that applies high performance building improvement methods and extensive construction knowledge to help…” Source: RevenueBase Database · checked Sep 12, 2026
11	EES Environmental Consulting INC	Strong evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	4 contacts →
	Strong evidence “EES is a unique team of professional consultants specializing in environmental assessment, investigation, and cleanup services.” Source: RevenueBase Database · checked Sep 12, 2026
12	Project Pivot	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	4 contacts →
	Indirect evidence “Project Pivot is a women-owned, sustainability consulting firm in Portland, Oregon.” Source: RevenueBase Database · checked Sep 12, 2026
13	QW Consulting, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	3 contacts →
	Indirect 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 12, 2026
14	Aquarius Environmental, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 12, 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 12, 2026
15	Spring Forward LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	2 contacts →
	Indirect evidence “Spring Forward LLC is a woman-owned sustainability consulting firm based out of Portland, Oregon.” Source: RevenueBase Database · checked Sep 12, 2026
16	Naomi Mermin Consulting	Partial evidence	Portland, ME, United StatesHQ checked Sep 12, 2026	1-10	2 contacts →
	Partial evidence “Naomi Mermin Consulting, LLC, is a woman-owned (WOSB certified) healthy housing and environmental strategy firm based in Portland, ME.” Source: RevenueBase Database · checked Sep 12, 2026
17	Noble Creek Biological Consulting, INC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
18	Integrative Economics, LLC	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	2 contacts →
	Indirect evidence “We are building a transdisciplinary team to help tackle pest and disease challenges in agriculture.” Source: RevenueBase Database · checked Sep 12, 2026
19	Five Stakes	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	1 contacts →
	Indirect evidence “Commitment There are roads to making progress on sustainability.and then there are shortcuts.” Source: RevenueBase Database · checked Sep 12, 2026
20	EDE Environmental, LLC	Partial evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	1 contacts →
	Partial evidence “I specialize in helping my clients navigate the ever-evolving landscape of environmental regulation and property remediation, bringing technical expertise, critical thinking, and…” Source: RevenueBase Database · checked Sep 12, 2026
21	Cause Sustainability	Partial evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	1 contacts →
	Partial evidence “Cause is a sustainable design consultancy focused on connecting creative design process with complex building performance information.” Source: RevenueBase Database · checked Sep 12, 2026
22	Climbsmart Strategies	Indirect evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	1 contacts →
	Indirect evidence “ClimbSmart Strategies specializes in guiding organizations through the complexities of change to drive purpose-forward and sustainable transformations.” Source: RevenueBase Database · checked Sep 12, 2026
23	Mcfadden Environmental LLC	Partial evidence	Portland, ME, United StatesHQ checked Sep 12, 2026	1-10	1 contacts →
	Partial evidence “McFadden Environmental is an environmental consulting firm based in Portland Maine.” Source: RevenueBase Database · checked Sep 12, 2026
24	Justin B. Green Consulting	Strong evidence	Portland, OR, United StatesHQ checked Sep 12, 2026	1-10	1 contacts →
	Strong evidence “Solutions-Oriented Consultancy Providing Environment, Energy, and Government Consulting.” Source: RevenueBase Database · checked Sep 12, 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: environmental consultancy 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 environmental consultancy firms.
Partial evidence: Its own public description names part of environmental consultancy firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental consultancy 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 24 of 44 environmental consultancy firms based in Portland, United States

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Environmental consultancy firms based in Portland, United States at a glance

As of Sep 12, 2026

51.4%Verified-email coverage

53.1%Mobile-number coverage

7.1Average contacts per company

1-10Median size (employees)

225.0%Largest-city concentration · Houston

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

1340–30

2531–60

061–90

190–180

0180+

Company record updated

Median 51.0d

00–30

17131–60

10161–90

2490–180

15180+

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 environmental consultancy 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 “environmental consultancy 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 environmental consultancy 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 environmental consultancy 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, 160 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 12, 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.

Environmental consultancy firms by metro in the United States

Environmental consultancy firms in Houston99
Environmental consultancy firms in New York77
Environmental consultancy firms in Seattle54
Environmental consultancy firms in Washington53
Environmental consultancy firms in Denver51
Environmental consultancy firms in Chicago51
Environmental consultancy firms in Portland46

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 environmental consultancy 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 environmental consultancy firms are there based in Portland, United States?

RevenueBase identified 44 environmental consultancy 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?

GSI Water Solutions, INC, headquartered in Portland, tops this list with the largest team on record.

Which city has the most environmental consultancy firms?

Houston leads with 99 headquartered companies, followed by New York (77) and Seattle (54).

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 160 verified decision-maker contacts tracked across these 44 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 12, 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.