Company lists · Data refreshed September 2026

Top 25 Esg strategy consulting firms based in Houston, United States

Name: Esg strategy consulting firms based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 185 companies tracked

RevenueBase identified 185 esg strategy consulting firms headquartered in Houston, United States as of September 2026 and tracks 3,296 professional contacts across them, including 573 with verified work emails. Across the United States, New York is the largest hub for this category (602 companies); Houston has 185.

This list covers esg strategy consulting firms headquartered in Houston, 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 30, 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 30, 2026 86% judged on-target in blind review

185Companies

3,296Contacts tracked

573Verified emails

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The 25 largest esg strategy consulting firms based in Houston, United States

Ranked by team size

Top 25 of 185 esg strategy consulting firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to esg strategy 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	GSI Environmental INC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	201-500	259 contacts →
	Partial evidence “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Source: RevenueBase Database · checked Sep 30, 2026
2	Tph&co	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	201-500	171 contacts →
	Partial evidence “TPH & Co, the energy business of Perella Weinberg, provides strategic and financial advice to investors, management teams, boards of directors, government bodies, and other…” Source: RevenueBase Database · checked Sep 30, 2026
3	Edge Engineering And Science, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	116 contacts →
	Indirect evidence “Edge Engineering & Science, LLC (EDGE) is a privately owned professional services firm headquartered in Houston, Texas.” Source: RevenueBase Database · checked Sep 30, 2026
4	Climeco	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	96 contacts →
	Indirect evidence “ClimeCo is an award-winning leader in decarbonization, empowering global organizations with customized sustainability pathways.” Source: RevenueBase Database · checked Sep 30, 2026
5	Mpact Strategic Consulting LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	77 contacts →
	Partial evidence “We are a business advisory and consulting company focused on delivering iMPACTful solutions and innovation to public and private sector clients that empower them to achieve…” Source: RevenueBase Database · checked Sep 30, 2026
6	Aarc Environmental	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	63 contacts →
	Indirect evidence “As a leader in the environmental compliance services industry, AARC does more than just meeting the needs of clients today.” Source: RevenueBase Database · checked Sep 30, 2026
7	Spirit Environmental Montrose Environmental Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	54 contacts →
	Indirect evidence “In July of 2024, Spirit was acquired by Onterris.” Source: RevenueBase Database · checked Sep 30, 2026
8	Pilko & Associates	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	50 contacts →
	Indirect evidence “We are the trusted Advisor to corporate officers and boards on mitigating Operational/EHS Risks and unlocking value for global energy, chemical and industrial companies.” Source: RevenueBase Database · checked Sep 30, 2026
9	Resolute Consulting Group	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	51-200	35 contacts →
	Partial evidence “Knowledge, Experience, Partnership Resolute Consulting Group is uniquely positioned to help your business achieve its goals.” Source: RevenueBase Database · checked Sep 30, 2026
10	UES Professional Solutions 64, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	31 contacts →
	Partial evidence “Environmental Consulting and Engineering InControl Technologies was established in 1997 to provide high-end quality environmental consulting services to owners of commercial and…” Source: RevenueBase Database · checked Sep 30, 2026
11	HSE International LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	23 contacts →
	Partial evidence “HSE International provides environmental, social, safety and strategic advisory services to the energy, infrastructure, extractive, financial and government sectors.” Source: RevenueBase Database · checked Sep 30, 2026
12	Acorn International, LLC	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	22 contacts →
	Partial evidence “Acorn International, LLC delivers environmental and social risk management consulting services to international industry and investors.” Source: RevenueBase Database · checked Sep 30, 2026
13	TGE Resources, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	21 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
14	Environmental Operational Solutions Eosolutions	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	19 contacts →
	Indirect evidence “At EOSolutions, we know you want your operations to stay in compliance.” Source: RevenueBase Database · checked Sep 30, 2026
15	ERC Environmental & Construction Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	18 contacts →
	Partial evidence “ERC is a Professional Services Firm in Environmental Consulting and Construction.” Source: RevenueBase Database · checked Sep 30, 2026
16	Mcbride Sustainability	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	17 contacts →
	Partial evidence “McBride SustainAbility is the leader consulting company with more than fifteen years of experience in sustainability, social responsibility, public relations as well as internal…” Source: RevenueBase Database · checked Sep 30, 2026
17	Spark Thought	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	16 contacts →
	Partial evidence “At Spark Thought, we help energy and industrial companies thrive by delivering practical, results-driven consulting in three mission-critical areas: Regulatory Compliance Services…” Source: RevenueBase Database · checked Sep 30, 2026
18	BFL Associates LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1-10	14 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 30, 2026
19	Trans4mative Advisors	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	13 contacts →
	Partial evidence “Trans4mative Advisors is a firm built to provide valued consulting to our clients and meaningful service to a larger world.” Source: RevenueBase Database · checked Sep 30, 2026
20	SKA Consulting, L.P	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	13 contacts →
	Partial evidence “SKA Consulting is a professional environmental engineering and consulting firm providing timely, innovative solutions to today’s environmental challenges.” Source: RevenueBase Database · checked Sep 30, 2026
21	Bocci Engineering	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1-10	13 contacts →
	Indirect evidence “Bocci is an energy and environmental engineering consultancy based in Houston, Texas providing high quality, innovative and cost-effective solutions that significantly reduce or…” Source: RevenueBase Database · checked Sep 30, 2026
22	Cypress Environmental Consulting	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1-10	8 contacts →
	Partial evidence “Cypress Environmental Consulting LLC (CEC) provides a broad range of environmental services including planning, site assessment, and permitting with a focus on regulatory…” Source: RevenueBase Database · checked Sep 30, 2026
23	Gray Reed Advisory Services	Partial evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1-10	8 contacts →
	Partial evidence “Gray Reed Advisory Services creates strategies that elevate companies from where they are today to where they want to be in the future.” Source: RevenueBase Database · checked Sep 30, 2026
24	Corrigan Consulting INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	11-50	7 contacts →
	Indirect evidence “Since 1986, CCI has been providing specialized services in hazardous waste compliance, permitting, site investigations, and closures; underground storage tank removals and…” Source: RevenueBase Database · checked Sep 30, 2026
25	Laveer Logix	Indirect evidence	Houston, TX, United StatesHQ checked Sep 30, 2026	1-10	6 contacts →
	Indirect evidence “GMC Consultants, LLC is now doing business as Laveer Logix!” Source: RevenueBase Database · checked Sep 30, 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: esg strategy 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 esg strategy consulting firms.
Partial evidence: Its own public description names part of esg strategy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name esg strategy 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 185 esg strategy consulting firms based in Houston, United States

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Esg strategy consulting firms based in Houston, United States at a glance

As of Sep 30, 2026

17.4%Verified-email coverage

17.8Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

135

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 185 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 esg strategy 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 Houston, United States whose own description of what they do matches “esg strategy 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 esg strategy 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 esg strategy consulting firms, and records with no verified work email. Companies headquartered outside Houston 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, 573 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 30, 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.

Esg strategy 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 esg strategy 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 esg strategy consulting firms are there based in Houston, United States?

RevenueBase identified 185 esg strategy consulting firms headquartered in Houston, 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 Environmental INC, headquartered in Houston, tops this list with the largest team on record.

Which city in the United States has the most esg strategy consulting firms?

New York leads the United States with 602 headquartered companies, followed by Chicago (230) and Washington (229). Houston has 185.

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 573 verified decision-maker contacts tracked across these 185 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 30, 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.