Company lists · Data refreshed October 2026

Top 25 Enterprise IT sustainability services providers based in the United States

Name: Enterprise IT sustainability services providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 19, 2026 2,535 companies tracked

RevenueBase identified 2,535 company matches for enterprise IT sustainability services providers associated with the United States as of October 2026 and tracks 49,388 professional contacts across them, including 20,824 with verified work emails. New York is the largest hub.

This list covers company matches for enterprise IT sustainability services providers 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 October 19, 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 Oct 19, 2026 How this list was built

2,535Companies

49,388Contacts tracked

20,824Verified emails

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The 25 largest enterprise IT sustainability services providers based in the United States

Ranked by team size

Top 25 of 2,535 company matches for enterprise IT sustainability services providers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 19, 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	APTIM	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 19, 2026	1,001-5,000	2,692 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 · Oct 19, 2026 · View company records in RevenueBase
2	Mckinstry	Exact match	Seattle, WA, United StatesHQ recorded Oct 19, 2026	1,001-5,000	2,293 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 · Oct 19, 2026 · View company records in RevenueBase
3	Clearesult	Exact match	Austin, TX, United StatesHQ recorded Oct 19, 2026	1,001-5,000	2,206 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 · Oct 19, 2026 · View company records in RevenueBase
4	Swca Environmental Consultants	Exact match	Phoenix, AZ, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,661 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 · Oct 19, 2026 · View company records in RevenueBase
5	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,513 contacts →
	Exact match “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
6	Adec Innovations	Exact match	Irvine, CA, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,508 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 · Oct 19, 2026 · View company records in RevenueBase
7	Sphera	Exact match	Chicago, IL, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,367 contacts →
	Exact match “Sphera helps companies understand and manage risk across their operations, products and supply chains by bringing safety, sustainability and performance data into one clear…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
8	OLA	Exact match	Austin, TX, United StatesHQ recorded Oct 19, 2026	n/a	1,150 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 · Oct 19, 2026 · View company records in RevenueBase
9	Triumvirate Environmental	Exact match	Somerville, MA, United StatesHQ recorded Oct 19, 2026	1,001-5,000	1,120 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 · Oct 19, 2026 · View company records in RevenueBase
10	Montrose Environmental Group	Exact match	Little Rock, AR, United StatesHQ recorded Oct 19, 2026	1,001-5,000	843 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 · Oct 19, 2026 · View company records in RevenueBase
11	Energy Solutions	Exact match	Oakland, CA, United StatesHQ recorded Oct 19, 2026	201-500	792 contacts →
	Exact match “Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
12	Uniqus Consultech INC	Exact match	San Jose, CA, United StatesHQ recorded Oct 19, 2026	501-1,000	788 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 · Oct 19, 2026 · View company records in RevenueBase
13	Decisionone	Exact match	Havertown, PA, United StatesHQ recorded Oct 19, 2026	501-1,000	686 contacts →
	Exact match “DecisionOne is the largest global independent technology support organization in the TPM and ISO markets.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
14	Antea Group USA	Exact match	St. Paul, MN, United StatesHQ recorded Oct 19, 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 · Oct 19, 2026 · View company records in RevenueBase
15	Watershed	Exact match	San Francisco, CA, United StatesHQ recorded Oct 19, 2026	201-500	564 contacts →
	Exact match “Watershed is the enterprise sustainability platform.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
16	Dupont Water Solutions	Exact match	Wilmington, DE, United StatesHQ recorded Oct 19, 2026	10001+	486 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 · Oct 19, 2026 · View company records in RevenueBase
17	Enhesa	Exact match	Arlington, VA, United StatesHQ recorded Oct 19, 2026	201-500	478 contacts →
	Exact match “At Enhesa we empower the world’s largest businesses to achieve compliance, manage risk, and drive sustainability with clear, actionable insights.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
18	Rubicon	Exact match	Atlanta, United StatesHQ recorded Oct 19, 2026	201-500	411 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 · Oct 19, 2026 · View company records in RevenueBase
19	TRIO	Exact match	Irvine, CA, United StatesHQ recorded Oct 19, 2026	201-500	387 contacts →
	Exact match “We are Trio – global energy and sustainability advisors.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
20	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Oct 19, 2026	201-500	381 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 · Oct 19, 2026 · View company records in RevenueBase
21	Wendel Companies	Exact match	Williamsville, NY, United StatesHQ recorded Oct 19, 2026	201-500	367 contacts →
	Exact match “Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
22	NUS Consulting Group	Exact match	Park Ridge, NJ, United StatesHQ recorded Oct 19, 2026	201-500	360 contacts →
	Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
23	Environmental Consulting & Technology, Inc. ECT	Exact match	Gainesville, FL, United StatesHQ recorded Oct 19, 2026	201-500	330 contacts →
	Exact match “Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
24	3degrees Group, INC	Exact match	San Francisco, CA, United StatesHQ recorded Oct 19, 2026	201-500	309 contacts →
	Exact match “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase
25	Cascade Energy	Exact match	Portland, OR, United StatesHQ recorded Oct 19, 2026	201-500	301 contacts →
	Exact match “At Cascade Energy, we believe in better.” Recorded in the RevenueBase company graph · Oct 19, 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 “enterprise IT sustainability services providers”. 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 2,535 enterprise IT sustainability services providers based in the United States

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Enterprise IT sustainability services providers based in the United States at a glance

As of Oct 19, 2026

42.2%Verified-email coverage

19.5Average contacts per company

1-10Median size (employees)

5.3%Largest-city concentration · New York

Oct 19, 2026Page data refreshed

Companies by employee count

1-10

1,586

11-50

671

51-200

186

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 2,535 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 “enterprise IT sustainability services providers” 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 20,824 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 October 19, 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.

Enterprise IT sustainability services providers 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 “enterprise IT sustainability services providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many enterprise IT sustainability services providers are there based in the United States?

RevenueBase identified 2,535 company matches for enterprise IT sustainability services providers associated with the United States as of October 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?

APTIM tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most enterprise IT sustainability services providers?

New York leads with 135 company records, followed by Houston (88) and Chicago (69).

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 20,824 professional contacts with verified work emails tracked across these 2,535 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 October 19, 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 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.