Company lists · Data refreshed September 2026
Top 25 Environmental sustainability consultants based in Houston, United States
RevenueBase identified 76 environmental sustainability consultants headquartered in Houston, United States as of September 2026 and tracks 808 professional contacts across them, including 296 with verified work emails. New York is the largest hub.
This list covers environmental sustainability consultants 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 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.
The 25 largest environmental sustainability consultants based in Houston, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 96 contacts → | ||||
Partial evidence “ClimeCo is an award-winning leader in decarbonization, empowering global organizations with customized sustainability pathways.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 63 contacts → | ||||
Partial evidence “Sage ATC Environmental Consulting is now Atlas.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 54 contacts → | ||||
Indirect evidence “In July of 2024, Spirit was acquired by Onterris.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 18 contacts → | ||||
Partial evidence “ERC is a Professional Services Firm in Environmental Consulting and Construction.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 13 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 9 contacts → | ||||
Indirect evidence “We help companies and their investors succeed in the Energy Transition We offer integrated support in Consulting and Project Development in Sustainable Energy” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 9 contacts → | ||||
Indirect evidence “Cimbria Consulting is a technical, scientific, and management consulting firm offering pragmatic tools to capture economic value for small-to-medium enterprises in agribusiness…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 6 contacts → | ||||
Partial evidence “Sustainable Environmental Solutions Company, SESCO, is based in Houston, Texas and is considered an innovator in the environmental solutions industry.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 6 contacts → | ||||
Partial evidence “ESG Lynk was founded to bring the discipline, rigor, and accountability of financial reporting into the rapidly evolving world of sustainability and ESG.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 5 contacts → | ||||
Indirect evidence “Sustainable Transition: Advisory, Development, Investment Management SWD is an advisory firm powered by an extensive team of experts.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 4 contacts → | ||||
Partial evidence “Emissions Experts Inc is a leading brokerage and consulting firm specializing in environmental credit markets.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 4 contacts → | ||||
Indirect evidence “ReImagine Biz empowers pioneering entrepreneurs to elevate their businesses into legacy enterprises that drive economic impact.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 3 contacts → | ||||
Partial evidence “Environeer is a veteran-owned environmental and geoscientific engineering consulting firm specializing in environmental permitting and compliance programs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 3 contacts → | ||||
Indirect evidence “We dedicate all of our business and its commitment to sustainable development, to our clients and to making their businesses stronger on all aspects, from strategy and development…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 3 contacts → | ||||
Partial evidence “National Environmental Services was established in 1995 and is a full service environmental consulting firm with locations in Houston Texas and Redlands California providing…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Partial evidence “IVY Energy is an independent energy management, procurement and sustainability firm helping companies implement strategies to control and reduce energy costs, increase…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Partial evidence “Strategic Insights, Profitable Outcomes for Energy (O&G) and Sustainability (CCS) Businesses We guide energy and carbon storage companies to increase profitability by providing…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2 contacts → | ||||
Partial evidence “At Latitudes Environmental, we understand that the environmental challenges your organization faces can vary greatly.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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 sustainability consultants. 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 sustainability consultants.
- Partial evidence
- Its own public description names part of environmental sustainability consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name environmental sustainability consultants. 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 76 environmental sustainability consultants based in Houston, United States
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Environmental sustainability consultants based in Houston, United States at a glance
As of Sep 21, 2026Companies by employee count
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 76 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 environmental sustainability consultants, 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 “environmental sustainability consultants”. 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 sustainability consultants), 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 sustainability consultants, 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, 296 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.
Environmental sustainability consultants by metro in the United States
- Environmental sustainability consultants in New York166
- Environmental sustainability consultants in Chicago80
- Environmental sustainability consultants in Washington77
- Environmental sustainability consultants in Houston76
- Environmental sustainability consultants in Los Angeles68
- Environmental sustainability consultants in San Francisco67
- Environmental sustainability consultants in Seattle64
- Environmental sustainability consultants in Atlanta58
- Environmental sustainability consultants in Miami54
- Environmental sustainability consultants in Denver49
- Environmental sustainability consultants in Portland42
- Environmental sustainability consultants in Austin37
- Environmental sustainability consultants in Philadelphia32
- Environmental sustainability consultants in San Diego29
- Environmental sustainability consultants in Boston27
- Environmental sustainability consultants in Dallas27
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 sustainability consultants, 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 sustainability consultants are there based in Houston, United States?
RevenueBase identified 76 environmental sustainability consultants 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 has the most environmental sustainability consultants?
New York leads with 166 headquartered companies, followed by Chicago (80) 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 296 verified decision-maker contacts tracked across these 76 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.
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