Company lists · Data refreshed September 2026

Top 25 Climate and environmental consulting firms based in New York, United States

Name: Climate and environmental consulting firms based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 114 companies tracked

RevenueBase identified 114 climate and environmental consulting firms headquartered in New York, United States as of September 2026 and tracks 13,334 professional contacts across them, including 7,559 with verified work emails. New York is the largest hub.

This list covers climate and environmental consulting firms headquartered in New York, 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

114Companies

13,334Contacts tracked

7,559Verified emails

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The 25 largest climate and environmental consulting firms based in New York, United States

Ranked by team size

Top 25 of 114 climate and environmental consulting firms based in New York, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to climate and environmental 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	WSP In The U.S	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	10001+	9,318 contacts →
	Partial evidence “What if you could shape built and natural environments – and the future of those that use them?” Source: RevenueBase Database · checked Sep 21, 2026
2	Hazen And Sawyer	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,100 contacts →
	Indirect evidence “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Source: RevenueBase Database · checked Sep 21, 2026
3	Agritecture	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	627 contacts →
	Strong evidence “Agritecture is a global advisory firm specializing in climate-smart agriculture and controlled environment agriculture (CEA).” Source: RevenueBase Database · checked Sep 21, 2026
4	AKRF	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	394 contacts →
	Indirect evidence “Founded in 1981, AKRF employs 400 planners, engineers, scientists, economists, landscape designers, geologists, historians, archaeologists, acousticians, and many related…” Source: RevenueBase Database · checked Sep 21, 2026
5	Onepointfive Opf.Degree	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	133 contacts →
	Indirect evidence “At OnePointFive we solve your sustainability focused business challenges by empowering your organization with expert-led solutions, embedded training, and cutting edge tools to…” Source: RevenueBase Database · checked Sep 21, 2026
6	Environ Energy	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	98 contacts →
	Indirect evidence “Environ Energy is a leader in accelerating global sustainable energy transformation for more than 30 years.” Source: RevenueBase Database · checked Sep 21, 2026
7	GRO Intelligence	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	51-200	67 contacts →
	Indirect evidence “Gro Intelligence illuminates the interrelationships between our earth’s ecology and human economy to help you see the big picture and act on the small details.” Source: RevenueBase Database · checked Sep 21, 2026
8	Growlity, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	47 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
9	True Environmental	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	37 contacts →
	Strong evidence “True Environmental (“True”) is building a diversified environmental services organization focused on consulting and engineering, water/wastewater management, testing/analytical…” Source: RevenueBase Database · checked Sep 21, 2026
10	Boomi Environmental LLC	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	21 contacts →
	Strong evidence “Boomi Environmental LLC (Boomi) is a premier environmental consulting firm specializing in providing practical, sustainable, and cost-effective solutions to water, wastewater, and…” Source: RevenueBase Database · checked Sep 21, 2026
11	Edesign Dynamics	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	20 contacts →
	Partial evidence “eDESIGN DYNAMICS is an environmental engineering and planning firm committed to solving water and ecological resources challenges in the developed and developing worlds.” Source: RevenueBase Database · checked Sep 21, 2026
12	Altanova	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	19 contacts →
	Partial evidence “Altanova is a sustainability firm with consulting and engineering capabilities.” Source: RevenueBase Database · checked Sep 21, 2026
13	Climate Nexus	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	12 contacts →
	Partial evidence “Climate Nexus was a strategic communications group dedicated to highlighting the wide-ranging impacts of climate change and clean energy solutions in the United States.” Source: RevenueBase Database · checked Sep 21, 2026
14	Ganey Science	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	11 contacts →
	Indirect evidence “Ganey Science is a small business enterprise based in New York.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ambient Group, INC	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	51-200	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
16	Parameter Climate	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial evidence “Parameter Climate is a unique advisory firm whose mission is to help the global economy manage the increasingly impactful risks of climate change by creating a scalable, efficient…” Source: RevenueBase Database · checked Sep 21, 2026
17	Maypole Environmental Inspections, LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “Maypole is a licensed inspection company with over 20 years of industry experience in navigating building codes and environmental hazards.” Source: RevenueBase Database · checked Sep 21, 2026
18	Hydro Tech Environmental Engineering And Geology, DPC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	10 contacts →
	Partial evidence “HydroTech Environmental Engineering and Geology, DPC, is a specialized engineering and consultancy firm that offers comprehensive, integrated services across the Water…” Source: RevenueBase Database · checked Sep 21, 2026
19	The Bassiouni Group	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	10 contacts →
	Partial evidence “The Bassiouni Group (TBG) is a global consulting firm.” Source: RevenueBase Database · checked Sep 21, 2026
20	Lawrence Env, LLC	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	9 contacts →
	Strong evidence “Lawrence Env LLC provides environmental due diligence and risk management consulting services to a broad spectrum of real estate clients.” Source: RevenueBase Database · checked Sep 21, 2026
21	Vektor Consultants	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	9 contacts →
	Strong evidence “An environmental consulting and construction management company providing an all-encompassing package to carry your projects to the next level.” Source: RevenueBase Database · checked Sep 21, 2026
22	Weatherbell Analytics, LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	8 contacts →
	Partial evidence “WeatherBELL Analytics LLC is a meteorological consulting firm that assists weather sensitive businesses to better manage their weather risk.” Source: RevenueBase Database · checked Sep 21, 2026
23	The Casa Group, INC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	7 contacts →
	Indirect evidence “Headquartered in New York City, The CASA Group, Inc.” Source: RevenueBase Database · checked Sep 21, 2026
24	Tenen Environmental	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	6 contacts →
	Partial evidence “Tenen Environmental provides effective and real world solutions for its clients in the areas of environmental engineering, geology and hydrogeology and regulatory compliance.” Source: RevenueBase Database · checked Sep 21, 2026
25	Enzo Advisors LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “We are a boutique global sustainability and climate advisory practice with two main focuses: Driving companies to build best-in-class business models within an ESG construct…” 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: climate and environmental 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 climate and environmental consulting firms.
Partial evidence: Its own public description names part of climate and environmental consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate and environmental 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 114 climate and environmental consulting firms based in New York, United States

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Climate and environmental consulting firms based in New York, United States at a glance

As of Sep 21, 2026

56.7%Verified-email coverage

117.0Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 114 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 climate and environmental 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 New York, United States whose own description of what they do matches “climate and environmental 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 climate and environmental 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 climate and environmental consulting firms, and records with no verified work email. Companies headquartered outside New York 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, 7,559 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.

Climate and environmental 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 climate and environmental 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 climate and environmental consulting firms are there based in New York, United States?

RevenueBase identified 114 climate and environmental consulting firms headquartered in New York, 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?

WSP In The U.S, headquartered in New York, tops this list with the largest team on record.

Which city has the most climate and environmental consulting firms?

New York leads with 114 headquartered companies, followed by Houston (102) 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 7,559 verified decision-maker contacts tracked across these 114 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.