Company lists · Data refreshed September 2026

Top 18 Natural resource management consultants based in Houston, United States

Name: Natural resource management consultants based in Houston, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 30 companies tracked

RevenueBase identified 30 natural resource management consultants headquartered in Houston, United States as of September 2026 and tracks 463 professional contacts across them, including 179 with verified work emails. Seattle is the largest hub.

This list covers natural resource management consultants headquartered in Houston, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

30Companies

463Contacts tracked

179Verified emails

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The 18 largest natural resource management consultants based in Houston, United States

Ranked by team size

Top 18 of 30 natural resource management consultants based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names natural resource management consultants: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	GSI Environmental INCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	201-500	259
	“GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Source: company website · checked Sep 5, 2026
2	Phase Engineering, LLCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	34
	“Phase Engineering, LLC, was founded in 1993 and is a leading engineering and environmental consulting firm, serving clients nationwide to deliver trusted environmental solutions.” Source: company website · checked Sep 5, 2026
3	UES Professional Solutions 64, LLCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	31
	“Environmental Consulting and Engineering InControl Technologies was established in 1997 to provide high-end quality environmental consulting services to owners of commercial and…” Source: company website · checked Sep 5, 2026
4	Acorn International, LLCPartial evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	22
	“Acorn International, LLC delivers environmental and social risk management consulting services to international industry and investors.” Source: company website · checked Sep 5, 2026
5	ERC Environmental & Construction ServicesIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	18
	“ERC is a Professional Services Firm in Environmental Consulting and Construction.” Source: company website · checked Sep 5, 2026
6	Mcbride SustainabilityIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	17
	“McBride SustainAbility is the leader consulting company with more than fifteen years of experience in sustainability, social responsibility, public relations as well as internal…” Source: company website · checked Sep 5, 2026
7	Cimbria ConsultingPartial evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	9
	“Cimbria Consulting is a technical, scientific, and management consulting firm offering pragmatic tools to capture economic value for small-to-medium enterprises in agribusiness…” Source: company website · checked Sep 5, 2026
8	Cypress Environmental ConsultingIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	8
	“Cypress Environmental Consulting LLC (CEC) provides a broad range of environmental services including planning, site assessment, and permitting with a focus on regulatory…” Source: company website · checked Sep 5, 2026
9	Corrigan Consulting INCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	11-50	7
	“Since 1986, CCI has been providing specialized services in hazardous waste compliance, permitting, site investigations, and closures; underground storage tank removals and…” Source: company website · checked Sep 5, 2026
10	Skylight Forestry INCPartial evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	4
	“As forest resources become increasingly scarce from the competing demands of agricultural production, conservation, development and climate change, managing them to promote forest…” Source: company website · checked Sep 5, 2026
11	Envirowave Enterprise Solutions LLCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	3
	“We dedicate all of our business and its commitment to sustainable development, to our clients and to making their businesses stronger on all aspects, from strategy and development…” Source: company website · checked Sep 5, 2026
12	Environeer Engineering ConsultingIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	3
	“Environeer is a veteran-owned environmental and geoscientific engineering consulting firm specializing in environmental permitting and compliance programs.” Source: company website · checked Sep 5, 2026
13	National Environmental ServicesIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	3
	“National Environmental Services was established in 1995 and is a full service environmental consulting firm with locations in Houston Texas and Redlands California providing…” Source: company website · checked Sep 5, 2026
14	East & Associates, INCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	3
	“East & Associates is a full-service environmental consulting firm.” Source: company website · checked Sep 5, 2026
15	Inpipe ConsultantsPartial evidence	Houston, United StatesHQ checked Sep 5, 2026	1-10	2
	“InPipe Consultants, LLC is a Limited Liability Company, located in Houston, Texas.” Source: company website · checked Sep 5, 2026
16	Latitudes EnvironmentalIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	2
	“At Latitudes Environmental, we understand that the environmental challenges your organization faces can vary greatly.” Source: company website · checked Sep 5, 2026
17	Herrera INCIndirect evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1-10	2
	Source: company website · checked Sep 5, 2026
18	Sustainable Infrastructure SolutionsPartial evidence	Houston, United StatesHQ checked Sep 5, 2026	1-10	1
	“Sustainable Infrastructure Solutions (SIS) is an integrated water resources planning and consulting firm that transforms ideas into action by providing innovative high-impact…” Source: company website · checked Sep 5, 2026

Showing 18 of 30 natural resource management consultants based in Houston, United States

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Natural resource management consultants based in Houston, United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

SeattleLargest hub · 35 HQs

Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

11-50

201-500

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 30 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 natural resource management consultants, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Houston, United States whose own description of what they do matches “natural resource management consultants”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among natural resource management consultants, and records with no verified work email. Companies headquartered outside Houston 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 an evidence 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, 179 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 5, 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.

Natural resource management consultants by metro in the United States

Natural resource management consultants in Seattle35
Natural resource management consultants in Houston30
Natural resource management consultants in Portland29
Natural resource management consultants in Washington26

Frequently asked

How many natural resource management consultants are there based in Houston, United States?

RevenueBase identified 30 natural resource management consultants headquartered in Houston, 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?

GSI Environmental INC, headquartered in Houston, tops this list with the largest team on record.

Which city has the most natural resource management consultants?

Seattle leads with 35 headquartered companies, followed by Houston (30) and Portland (29).

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 179 verified decision-maker contacts tracked across these 30 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 5, 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.