Company lists · Data refreshed September 2026

Top 25 Sustainability consulting companies based in the United States

Name: Sustainability consulting companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 3,310 companies tracked

RevenueBase identified 3,310 company matches for sustainability consulting companies associated with the United States as of September 2026 and tracks 70,576 professional contacts across them, including 31,290 with verified work emails. New York is the largest hub.

This list covers company matches for sustainability consulting companies associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 22, 2026 How this list was built

3,310Companies

70,576Contacts tracked

31,290Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest sustainability consulting companies based in the United States

Ranked by team size

Top 25 of 3,310 company matches for sustainability consulting companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	WSP In The U.S	Exact match	New York, NY, United StatesHQ recorded Sep 22, 2026	10001+	9,318 contacts →
	Exact match “What if you could shape built and natural environments – and the future of those that use them?” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	2,639 contacts →
	Exact match “APTIM enhances the quality of the environment, wellbeing of people, resilience of communities, and opportunity for employees to make a difference, not just a living.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3	Frost & Sullivan	Exact match	San Antonio, TX, United StatesHQ recorded Sep 22, 2026	1,001-5,000	2,330 contacts →
	Exact match “For over six decades, Frost & Sullivan has helped the world’s top companies toward transformational growth journeys that result in a stream of innovative growth opportunities.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	2,213 contacts →
	Exact match “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Sep 22, 2026	1,001-5,000	2,121 contacts →
	Exact match “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,629 contacts →
	Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,529 contacts →
	Exact match “Onterris (formerly Montrose Environmental Group) was one of the first to see environmental responsibility as not just an imperative but as a strategic asset.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8	Adec Innovations	Exact match	Irvine, CA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,304 contacts →
	Exact match “ADEC Innovations seamlessly delivers fully integrated, cost-effective industry expertise, business process & data management, and software services.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	OLA	Exact match	Austin, TX, United StatesHQ recorded Sep 22, 2026	n/a	1,145 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10	Verdantas	Exact match	Tampa, FL, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,139 contacts →
	Exact match “At Verdantas, we blend engineering and environmental science together with advanced technology and world-renowned labs to create solutions with the big picture in mind.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	Triumvirate Environmental	Exact match	Somerville, MA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,068 contacts →
	Exact match “Triumvirate Environmental provides sustainable environmental solutions to leading companies in the Life Sciences, Healthcare, Education, and Advanced Manufacturing markets.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12	Trinity Consultants	Exact match	Dallas, TX, United StatesHQ recorded Sep 22, 2026	1,001-5,000	961 contacts →
	Exact match “Trinity Consultants is a global team of experts helping organizations solve complex challenges in environmental compliance, ecological protection, infrastructure performance, and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13	ATC Group Services LLC	Exact match	Lafayette, LA, United StatesHQ recorded Sep 22, 2026	1,001-5,000	865 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	Franklin Energy	Exact match	Port Washington, WI, United StatesHQ recorded Sep 22, 2026	1,001-5,000	838 contacts →
	Exact match “Franklin Energy delivers end-to-end sustainability solutions through a portfolio of intelligent products and services that lower energy costs, reduce carbon and waste, and grow…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Environmental Science Associates	Exact match	San Francisco, CA, United StatesHQ recorded Sep 22, 2026	501-1,000	732 contacts →
	Exact match “ESA is a 100% employee-owned environmental consulting firm.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	Uniqus Consultech INC	Exact match	San Jose, CA, United StatesHQ recorded Sep 22, 2026	501-1,000	675 contacts →
	Exact match “Uniqus Consultech is an AI and global tech-enabled consulting company that specializes in Accounting & Reporting Consulting, Governance, Risk & Compliance, Sustainability &…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	Antea Group USA	Exact match	St. Paul, MN, United StatesHQ recorded Sep 22, 2026	1,001-5,000	658 contacts →
	Exact match “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18	EBI Consulting	Exact match	Burlington, MA, United StatesHQ recorded Sep 22, 2026	501-1,000	535 contacts →
	Exact match “For 35 years we have been helping investors, lenders, owners, developers, contractors, and property managers reduce risk and optimize their built facilities, infrastructure and…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19	Rincon Consultants	Exact match	Ventura, CA, United StatesHQ recorded Sep 22, 2026	501-1,000	479 contacts →
	Exact match “Rincon Consultants is a multi-disciplinary environmental sciences, planning, and engineering consulting firm that provides quality professional services to government and industry.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20	Dupont Water Solutions	Exact match	Wilmington, DE, United StatesHQ recorded Sep 22, 2026	10001+	470 contacts →
	Exact match “We’re helping companies in every industry, in every corner of the globe make real progress.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21	Groundwater & Environmental Services, INC	Exact match	Wall Township, NJ, United StatesHQ recorded Sep 22, 2026	201-500	447 contacts →
	Exact match “We are Groundwater & Environmental Services, Inc, better known as GES.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	ROUX	Exact match	Islandia, NY, United StatesHQ recorded Sep 22, 2026	201-500	433 contacts →
	Exact match “Founded 40 years ago, Roux is recognized for being a highly effective, client-focused environmental consulting and management firm.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Sep 22, 2026	201-500	383 contacts →
	Exact match “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	Rubicon	Exact match	Atlanta, GA, United StatesHQ recorded Sep 22, 2026	201-500	377 contacts →
	Exact match “Rubicon is a waste sciences company that helps national organizations, small and mid-sized businesses, and everyday consumers simplify and optimize their environmental operations…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Sep 22, 2026	201-500	375 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “sustainability consulting companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 3,310 sustainability consulting companies based in the United States

See the full list, filter by size, metro and specialty, and access 31,290 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Sustainability consulting companies based in the United States at a glance

As of Sep 22, 2026

44.3%Verified-email coverage

21.3Average contacts per company

1-10Median size (employees)

5.5%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

2,330

11-50

722

51-200

174

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 3,310 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United States whose business descriptions match “sustainability consulting companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 31,290 professional contacts with verified work emails across the full matched dataset. 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 22, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Sustainability consulting companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “sustainability consulting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainability consulting companies are there based in the United States?

RevenueBase identified 3,310 company matches for sustainability consulting companies associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

WSP In The U.S tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most sustainability consulting companies?

New York leads with 181 company records, followed by Houston (84) and Chicago (81).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 31,290 professional contacts with verified work emails tracked across these 3,310 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,310 sustainability consulting companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

Sustainability consulting companies by geography

Browse the directory

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 SmartSearch, 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.