Company lists · Data refreshed September 2026

Top 25 Sustainability and climate change consulting firms based in Los Angeles, United States

Name: Sustainability and climate change consulting firms based in Los Angeles, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 67 companies tracked

RevenueBase identified 67 sustainability and climate change consulting firms headquartered in Los Angeles, United States as of September 2026 and tracks 1,086 professional contacts across them, including 571 with verified work emails. New York is the largest hub.

This list covers sustainability and climate change consulting firms headquartered in Los Angeles, 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 21, 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 21, 2026 86% judged on-target in blind review

67Companies

1,086Contacts tracked

571Verified emails

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The 25 largest sustainability and climate change consulting firms based in Los Angeles, United States

Ranked by team size

Top 25 of 67 sustainability and climate change consulting firms based in Los Angeles, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability and climate change 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	Psomas	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	501-1,000	748 contacts →
	Indirect evidence “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Source: RevenueBase Database · checked Sep 21, 2026
2	Partner Energy	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	51-200	57 contacts →
	Indirect evidence “Partner Energy, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
3	Verdical Group	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	29 contacts →
	Strong evidence “Established in 2012, Verdical Group has developed a nationally known brand and industry leading reputation as a sustainability consulting firm focused on decarbonizing the built…” Source: RevenueBase Database · checked Sep 21, 2026
4	Viridan Group	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “Viridan Group is an executive search firm at the forefront of two of the most dynamic industries shaping the modern world: Energy and Data Centers.” Source: RevenueBase Database · checked Sep 21, 2026
5	Impact Sciences	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	18 contacts →
	Indirect evidence “Informing communities and creating a clear path to understanding are at the core of what we do at Impact Sciences.” Source: RevenueBase Database · checked Sep 21, 2026
6	Leading Edge	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	17 contacts →
	Partial evidence “Leading Edge is a California based sustainability consultancy.” Source: RevenueBase Database · checked Sep 21, 2026
7	Ecomotion	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	10 contacts →
	Strong evidence “EcoMotion provides sustainability advising and consulting cities, counties, utilities, corporations, and campuses to help them achieve their energy and environmental goals.” Source: RevenueBase Database · checked Sep 21, 2026
8	ALL About Waste	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “Over 21 Years of Expertise in Sustainability Solutions At All About Waste, we are an award-winning global leader in zero-waste and circular economy solutions.” Source: RevenueBase Database · checked Sep 21, 2026
9	Argento Graham	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	7 contacts →
	Partial evidence “Argento/Graham offers strategic and technical green building consulting services to all stakeholders involved in the development and operation of new and existing buildings.” Source: RevenueBase Database · checked Sep 21, 2026
10	Bespoke ESG	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Bespoke ESG gets companies through the sustainability work that has a deadline.” Source: RevenueBase Database · checked Sep 21, 2026
11	Ethowork Consulting, LLC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Indirect evidence “Thank you for visiting our page.” Source: RevenueBase Database · checked Sep 21, 2026
12	NEW Theme	Partial evidence	Los Angeles, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “Expanding upon the premise of sustainability, NEW THEME architecture seeks to foster a dialogue between green ideas and their articulation in radical new forms.” Source: RevenueBase Database · checked Sep 21, 2026
13	Labeling Sustainability INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	5 contacts →
	Partial evidence “At Labeling Sustainability, we are dedicated to guiding manufacturers, their suppliers and their distributors through the intricate journey of environmental accountability.” Source: RevenueBase Database · checked Sep 21, 2026
14	Okapi Architecture INC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “Okapi is passionate about bringing the design teams to the world of sustainability and energy efficiency by collaborating with public utility's fundings, such as Savings By Design.” Source: RevenueBase Database · checked Sep 21, 2026
15	Earthara	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “We work across sectors, partnering with clients ranging from startups and small businesses to Fortune companies.” Source: RevenueBase Database · checked Sep 21, 2026
16	ZC Sustainability	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	3 contacts →
	Strong evidence “We are a collaborative of trusted advisors who are committed to addressing climate change by helping create a sustainable, high performing, resilient, and equitable built…” Source: RevenueBase Database · checked Sep 21, 2026
17	Insight Energy Consulting	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	3 contacts →
	Strong evidence “At Insight Energy Consulting, our mission is to innovate and lead in energy efficiency and sustainability.” Source: RevenueBase Database · checked Sep 21, 2026
18	Livingworks	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	2 contacts →
	Indirect evidence “LivingWorks is a forward thinking firm focused on creative, practical, and cost-effective sustainable solutions for commercial and institutional buildings, both public and private.” Source: RevenueBase Database · checked Sep 21, 2026
19	319climate	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	2 contacts →
	Strong evidence “319Climate is a boutique consulting and innovation dedicated to accelerating the transition to a low carbon, climate resilient and equitable future.” Source: RevenueBase Database · checked Sep 21, 2026
20	Mimeos Sustainability Consultants	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	2 contacts →
	Partial evidence “Mimeos is the premier sustainability consultancy dedicated to designing & building solar energy systems with an "Efficiency-First" Approach.” Source: RevenueBase Database · checked Sep 21, 2026
21	Bison Tiger	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	2 contacts →
	Partial evidence “We are a CREATIVE agency, PRODUCTION house, and SUSTAINABILITY consultancy with a unique perspective and skill set.” Source: RevenueBase Database · checked Sep 21, 2026
22	Industrymc	Strong evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	11-50	1 contacts →
	Strong evidence “IndustryMC is a boutique Los Angeles-based management consulting firm that unlocks cost savings, efficiency gains and climate solutions for industrial facilities.” Source: RevenueBase Database · checked Sep 21, 2026
23	Accelerating Purpose	Partial evidence	Los Angeles, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Partial evidence “Accelerating Purpose is an impact consulting firm whose mission is to collaborate with purpose-driven business leaders to activate their most pressing and compelling social and…” Source: RevenueBase Database · checked Sep 21, 2026
24	Sustainable Design Collective INC SDC	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Indirect evidence “Sustainable Design Collective (SDC) is a design-led consultancy operating across advisory, project delivery, and communications, focused on creating healthier and more sustainable…” Source: RevenueBase Database · checked Sep 21, 2026
25	ONE Small Step Sustainability Consulting	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 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: sustainability and climate change 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 sustainability and climate change consulting firms.
Partial evidence: Its own public description names part of sustainability and climate change consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability and climate change 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 67 sustainability and climate change consulting firms based in Los Angeles, United States

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Sustainability and climate change consulting firms based in Los Angeles, United States at a glance

As of Sep 21, 2026

52.6%Verified-email coverage

16.2Average contacts per company

1-10Median size (employees)

258.2%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole United States list rather than for Los Angeles, so it is reported there. Company counts and contact totals on this page are exact for Los Angeles, over 67 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 sustainability and climate change 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 Los Angeles, United States whose own description of what they do matches “sustainability and climate change 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 sustainability and climate change 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 sustainability and climate change consulting firms, and records with no verified work email. Companies headquartered outside Los Angeles 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, 571 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 21, 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.

Sustainability and climate change consulting firms by metro in the United States

Sustainability and climate change consulting firms in New York173
Sustainability and climate change consulting firms in Houston79
Sustainability and climate change consulting firms in Washington77
Sustainability and climate change consulting firms in Chicago72
Sustainability and climate change consulting firms in Los Angeles67
Sustainability and climate change consulting firms in San Francisco63
Sustainability and climate change consulting firms in Seattle61
Sustainability and climate change consulting firms in Atlanta44
Sustainability and climate change consulting firms in Portland43
Sustainability and climate change consulting firms in Denver42
Sustainability and climate change consulting firms in Miami38
Sustainability and climate change consulting firms in San Diego32
Sustainability and climate change consulting firms in Austin31
Sustainability and climate change consulting firms in Boston31
Sustainability and climate change consulting firms in Philadelphia28
Sustainability and climate change consulting firms in New York City25

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 sustainability and climate change 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 sustainability and climate change consulting firms are there based in Los Angeles, United States?

RevenueBase identified 67 sustainability and climate change consulting firms headquartered in Los Angeles, 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?

Psomas, headquartered in Los Angeles, tops this list with the largest team on record.

Which city has the most sustainability and climate change consulting firms?

New York leads with 173 headquartered companies, followed by Houston (79) and Washington (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 571 verified decision-maker contacts tracked across these 67 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 21, 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.