Company lists · Data refreshed September 2026

Top 25 Environmental consulting agencies based in Denver, United States

Name: Environmental consulting agencies based in Denver, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 58 companies tracked

RevenueBase identified 58 company matches for environmental consulting agencies associated with Denver, United States as of September 2026 and tracks 2,006 professional contacts across them, including 1,011 with verified work emails. Across the United States, Houston is the largest hub for this category (127 companies); Denver has 58.

This list covers company matches for environmental consulting agencies associated with Denver, 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 21, 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 21, 2026 How this list was built

58Companies

2,006Contacts tracked

1,011Verified emails

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The 25 largest environmental consulting agencies based in Denver, United States

Ranked by team size

Top 25 of 58 company matches for environmental consulting agencies based in Denver, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	Knight Piesold	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,231 contacts →
	Exact match “Knight Piésold is an employee-owned, global consulting firm providing specialist services to the mining, power, water resources, and infrastructure industries.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	CTL Thompson	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	201-500	189 contacts →
	Exact match “CTL\|Thompson (CTL\|T) has been providing innovative engineering solutions throughout Colorado since 1971.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	LRE Water A Spheros Environmental Company	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	51-200	94 contacts →
	Exact match “LRE Water is now Spheros Environmental.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Group14 Engineering, PBC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	75 contacts →
	Exact match “Group14 Engineering is a Denver-based consulting firm committed to inspiring better buildings where people thrive.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Spheros Environmental	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	201-500	48 contacts →
	Exact match “Environmental insight for complex real-world decisions Spheros Environmental helps clients make clear, defensible decisions in complex environments.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Ayuda Companies	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	51-200	45 contacts →
	Exact match “Established in 2002, Ayuda has successfully performed $300M+ in government and commercial contracts.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Quandary Consultants	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	51-200	40 contacts →
	Exact match “Quandary Consultants, LLC (QC) is an environmental and regulatory consulting company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Colorado Hazard Control, LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	51-200	25 contacts →
	Exact match “At Colorado Hazard Control, we know that every project is unique.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Urban Solution Group	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	17 contacts →
	Exact match “Urban Solution Group is the turnkey solution for mitigating compliance and nuisance impacts for industrial, urban operations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	AET Environmental	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	17 contacts →
	Exact match “AET Environmental, a Heritage-Crystal Clean Company, is a leading provider of environmental services, hazardous waste handling, compliance, and remediation.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Auxilio Management Services	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	15 contacts →
	Exact match “Auxilio is an Economically Disadvantaged Women-Owned Small Business (EDWOSB).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Quest Environmental	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	15 contacts →
	Exact match “At QUEST Environmental, we're dedicated to ensuring you live and work in the safest, healthiest environments possible.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Solum Consulting Group	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	15 contacts →
	Exact match “The environment and sustainability are key considerations across the mining, energy and resources sectors.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Applegate Group, INC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Environmental Technical Solutions, LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	9 contacts →
	Exact match “ETS provides a dynamic team of experts needed to support a wide range of environmental services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Soli Technical, LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	7 contacts →
	Exact match “Soli brings decades of environmental and engineering experience to solve your problems in a cost effective, practical, and timely manner.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Fielding Hill, LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	7 contacts →
	Exact match “Navigating Energy Regulations with Expertise - At Fielding Hill, we specialize in guiding energy sector clients through the complexities of regulatory, environmental, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Vanoco Consulting	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	7 contacts →
	Exact match “Vanoco has locations in both Denver and Calgary.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Rockwood LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	5 contacts →
	Exact match “Rockwood is a leading provider of environmental solution services specifically catering to the oil and gas industry.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Canopy Edge	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	11-50	4 contacts →
	Exact match “Canopy Edge is a global management consulting firm that provides clients with the strategic advice and tools needed to navigate and excel in the Net Zero corporate sustainability…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Devoe Law, LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “For over 20 years, DeVoe law has focused on regulatory and environmental compliance and litigation, natural resources law, water rights, land use and real estate law, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Slosky & Company	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Bristlecone Ecology	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Swift Operating Partners LLC	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “SWIFT Operating Partners is proud to offer an extensive range of environmental services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Jodi Stemler Consulting	Exact match	Denver, CO, United StatesHQ recorded Sep 21, 2026	1-10	2 contacts →
	Exact match “Jodi Stemler Consulting focuses on the nexus between policy and communications for the natural resource conservation community and outdoor industry.” Recorded in the RevenueBase company graph · Sep 21, 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 “environmental consulting agencies”. 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 58 environmental consulting agencies based in Denver, United States

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Environmental consulting agencies based in Denver, United States at a glance

As of Sep 21, 2026

50.4%Verified-email coverage

34.6Average contacts per company

1-10Median size (employees)

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Denver, so it is reported there. Company counts and contact totals on this page are exact for Denver, over 58 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 Denver, United States whose business descriptions match “environmental consulting agencies” 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 1,011 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 21, 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.

Environmental consulting agencies by metro in the United States

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 “environmental consulting agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many environmental consulting agencies are there based in Denver, United States?

RevenueBase identified 58 company matches for environmental consulting agencies associated with Denver, 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?

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

Which city in the United States has the most environmental consulting agencies?

Houston leads the United States with 127 company records, followed by New York (89) and Seattle (72). Denver has 58.

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 1,011 professional contacts with verified work emails tracked across these 58 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 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 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.