Company lists · Data refreshed September 2026

Top 25 Sustainable design consultants based in the United States

Name: Sustainable design consultants 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 4,809 companies tracked

RevenueBase identified 4,809 company matches for sustainable design consultants associated with the United States as of September 2026 and tracks 105,173 professional contacts across them, including 52,427 with verified work emails. New York is the largest hub.

This list covers company matches for sustainable design consultants 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

4,809Companies

105,173Contacts tracked

52,427Verified emails

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The 25 largest sustainable design consultants based in the United States

Ranked by team size

Top 25 of 4,809 company matches for sustainable design consultants 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	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
4	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 22, 2026	1,001-5,000	2,177 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5	DLR Group	Exact match	30 Offices, MN, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,992 contacts →
	Exact match “DLR Group is an integrated design firm delivering architecture, engineering, interiors, planning, and building optimization for new construction, renovation, and adaptive reuse.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,985 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7	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
8	CRB	Exact match	Kansas City, MO, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,553 contacts →
	Exact match “CRB designs and builds the facilities that help bring life-enhancing therapies, critical medicines, and essential products to people around the world.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9	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
10	Halcrow	Exact match	Dallas, TX, United StatesHQ recorded Sep 22, 2026	10001+	1,256 contacts →
	Exact match “Halcrow is now Jacobs.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11	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
12	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
13	Apex Companies	Exact match	Rockville, MD, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,137 contacts →
	Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14	Barr Engineering CO	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,088 contacts →
	Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15	Braun Intertec Corporation	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 22, 2026	1,001-5,000	1,065 contacts →
	Exact match “At Braun Intertec, we work at the intersection of the natural and built environments, combining science, technology, and engineering.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16	IEA	Exact match	Brooklyn Park, MN, United StatesHQ recorded Sep 22, 2026	n/a	982 contacts →
	Exact match “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17	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
18	Parametrix	Exact match	Seattle, WA, United StatesHQ recorded Sep 22, 2026	501-1,000	880 contacts →
	Exact match “At Parametrix, we help our clients imagine what's possible.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19	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
20	Introba	Exact match	St. Louis, MO, United StatesHQ recorded Sep 22, 2026	1,001-5,000	822 contacts →
	Exact match “Introba is one of the world’s largest building engineering and consulting firms with more than employees in offices across the United States, Canada, the United Kingdom, Serbia…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Sep 22, 2026	501-1,000	803 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22	DUDEK	Exact match	Encinitas, CA, United StatesHQ recorded Sep 22, 2026	501-1,000	795 contacts →
	Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23	Psomas	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 22, 2026	501-1,000	748 contacts →
	Exact match “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24	PAE	Exact match	Portland, OR, United StatesHQ recorded Sep 22, 2026	201-500	744 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25	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

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 “sustainable design consultants”. 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 4,809 sustainable design consultants based in the United States

See the full list, filter by size, metro and specialty, and access 52,427 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Sustainable design consultants based in the United States at a glance

As of Sep 22, 2026

49.8%Verified-email coverage

21.9Average contacts per company

1-10Median size (employees)

5.7%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

3,209

11-50

1,202

51-200

272

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 4,809 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 “sustainable design consultants” 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 52,427 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.

Sustainable design consultants 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 “sustainable design consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many sustainable design consultants are there based in the United States?

RevenueBase identified 4,809 company matches for sustainable design consultants 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 sustainable design consultants?

New York leads with 275 company records, followed by Chicago (105) and Houston (87).

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 52,427 professional contacts with verified work emails tracked across these 4,809 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.

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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.