Company lists · Data refreshed September 2026

Top 25 Nature-inspired engineering firms based in the United States

Name: Nature-inspired engineering firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,468 companies tracked

RevenueBase identified 1,468 nature-inspired engineering firms headquartered in the United States as of September 2026 and tracks 36,896 professional contacts across them, including 19,431 with verified work emails. New York is the largest hub.

This list covers nature-inspired engineering firms headquartered in the 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 17, 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 17, 2026 86% judged on-target in blind review

1,468Companies

36,896Contacts tracked

19,431Verified emails

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The 25 largest nature-inspired engineering firms based in the United States

Ranked by team size

Top 25 of 1,468 nature-inspired engineering firms based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to nature-inspired engineering 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	DLR Group	Partial evidence	30 Offices, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,992 contacts →
	Partial evidence “DLR Group is an integrated design firm delivering architecture, engineering, interiors, planning, and building optimization for new construction, renovation, and adaptive reuse.” Source: RevenueBase Database · checked Sep 17, 2026
2	IMEG	Partial evidence	Rock Island, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,985 contacts →
	Partial evidence “Leaders in Engineering and Innovation.” Source: RevenueBase Database · checked Sep 17, 2026
3	CRB	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,553 contacts →
	Indirect evidence “CRB designs and builds the facilities that help bring life-enhancing therapies, critical medicines, and essential products to people around the world.” Source: RevenueBase Database · checked Sep 17, 2026
4	Walter P Moore	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,298 contacts →
	Indirect evidence “Welcome to Walter P Moore!” Source: RevenueBase Database · checked Sep 17, 2026
5	Pennoni	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,264 contacts →
	Indirect evidence “Since our founding more than five decades ago, our clients trust Pennoni’s commitment to elevating the impact of projects on our communities.” Source: RevenueBase Database · checked Sep 17, 2026
6	Verdantas	Partial evidence	Tampa, FL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,139 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
7	Braun Intertec Corporation	Strong evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,065 contacts →
	Strong evidence “At Braun Intertec, we work at the intersection of the natural and built environments, combining science, technology, and engineering.” Source: RevenueBase Database · checked Sep 17, 2026
8	Introba	Partial evidence	St Louis, MO, United StatesHQ checked Sep 17, 2026	1,001-5,000	822 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
9	Shimmick Corporation	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 17, 2026	1,001-5,000	760 contacts →
	Indirect evidence “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Source: RevenueBase Database · checked Sep 17, 2026
10	PAE	Partial evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	201-500	744 contacts →
	Partial evidence “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Source: RevenueBase Database · checked Sep 17, 2026
11	Resource Environmental Solutions LLC	Partial evidence	Bellaire, TX, United StatesHQ checked Sep 17, 2026	501-1,000	677 contacts →
	Partial evidence “As the nation’s largest nature-based solutions company, RES (Resource Environmental Solutions) is restoring a resilient earth for a modern world, project by project.” Source: RevenueBase Database · checked Sep 17, 2026
12	DRMP	Partial evidence	Orlando, FL, United StatesHQ checked Sep 17, 2026	501-1,000	567 contacts →
	Partial evidence “Founded in 1977, DRMP is a multi-discipline civil engineering and surveying firm that develops innovative and sustainable design solutions for infrastructure in the public…” Source: RevenueBase Database · checked Sep 17, 2026
13	RTM Engineering Consultants	Partial evidence	Schaumburg, IL, United StatesHQ checked Sep 17, 2026	201-500	516 contacts →
	Partial evidence “We are an engineering firm that goes beyond a typical consulting role.” Source: RevenueBase Database · checked Sep 17, 2026
14	Anchor QEA	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	501-1,000	479 contacts →
	Partial evidence “Headquartered in Seattle, Washington, Anchor QEA is a nationally recognized environmental science and engineering consulting firm specializing in aquatic, shoreline, and water…” Source: RevenueBase Database · checked Sep 17, 2026
15	Fuss & O'neill	Partial evidence	Hartford, CT, United StatesHQ checked Sep 17, 2026	201-500	461 contacts →
	Partial evidence “Fuss & O’Neill is a civil and environmental engineering firm that provides client-specific, forward-thinking, and holistic solutions.” Source: RevenueBase Database · checked Sep 17, 2026
16	Progressive Companies	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 17, 2026	201-500	460 contacts →
	Indirect evidence “We are designers of a bold new future, creating high-performance structures and pathways that deliver what clients need today and preparing them for what’s to come.” Source: RevenueBase Database · checked Sep 17, 2026
17	Sitelogiq	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	501-1,000	450 contacts →
	Partial evidence “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
18	Collins Engineers, INC	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	432 contacts →
	Indirect evidence “In 1979, Collins Engineers, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
19	DCI Engineers	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	201-500	404 contacts →
	Partial evidence “DCI Engineers has been providing client-focused structural and civil engineering services for over three decades.” Source: RevenueBase Database · checked Sep 17, 2026
20	BRPH	Partial evidence	Melbourne, FL, United StatesHQ checked Sep 17, 2026	201-500	393 contacts →
	Partial evidence “BRPH is a technically focused architecture, engineering and construction firm with six decades of expertise in helping mission-driven clients identify gaps in their program…” Source: RevenueBase Database · checked Sep 17, 2026
21	Newcomb & Boyd, LLP	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 17, 2026	201-500	363 contacts →
	Indirect evidence “We help clients design and operate facilities that remain resilient, reliable, and ready for what's next.” Source: RevenueBase Database · checked Sep 17, 2026
22	Degenkolb Engineers	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 17, 2026	201-500	332 contacts →
	Indirect evidence “Founded in 1940, Degenkolb Engineers’ practice reflects more than eight decades of commitment to expertise, client service, and life-long learning.” Source: RevenueBase Database · checked Sep 17, 2026
23	WET Design	Indirect evidence	Burbank, CA, United StatesHQ checked Sep 17, 2026	201-500	323 contacts →
	Indirect evidence “In an increasingly digital world, we crave more than ever the authenticity of real human connection.” Source: RevenueBase Database · checked Sep 17, 2026
24	Environmental Consulting & Technology, Inc. ECT	Indirect evidence	Gainesville, FL, United StatesHQ checked Sep 17, 2026	201-500	305 contacts →
	Indirect evidence “Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Source: RevenueBase Database · checked Sep 17, 2026
25	VLK	Indirect evidence	Fort Worth, TX, United StatesHQ checked Sep 17, 2026	201-500	297 contacts →
	Indirect evidence “VLK designs exemplary environments, innovative structures, and sustainable communities for tomorrow.” Source: RevenueBase Database · checked Sep 17, 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: nature-inspired engineering 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 nature-inspired engineering firms.
Partial evidence: Its own public description names part of nature-inspired engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nature-inspired engineering 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 1,468 nature-inspired engineering firms based in the United States

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Nature-inspired engineering firms based in the United States at a glance

As of Sep 17, 2026

52.7%Verified-email coverage

25.1Average contacts per company

1-10Median size (employees)

4.3%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

881

11-50

444

51-200

201-500

501-1,000

1,001-5,000

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 1,468 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 nature-inspired engineering 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 the United States whose own description of what they do matches “nature-inspired engineering 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 nature-inspired engineering 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 nature-inspired engineering firms, and records with no verified work email. Companies headquartered outside United States 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, 19,431 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 17, 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.

Nature-inspired engineering firms by metro

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 nature-inspired engineering 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 nature-inspired engineering firms are there based in the United States?

RevenueBase identified 1,468 nature-inspired engineering firms headquartered in the 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?

DLR Group, headquartered in Minneapolis, tops this list with the largest team on record.

Which city has the most nature-inspired engineering firms?

New York leads with 63 headquartered companies, followed by Los Angeles (36) and Seattle (36).

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 19,431 verified decision-maker contacts tracked across these 1,468 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 17, 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.