Company lists · Data refreshed September 2026

Top 25 Field analysis and consulting firms based in Houston, United States

RevenueBase identified 109 field analysis and consulting firms headquartered in Houston, United States as of September 2026 and tracks 7,335 professional contacts across them, including 4,153 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers field analysis and consulting firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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 28, 2026 86% judged on-target in blind review
109Companies
7,335Contacts tracked
4,153Verified emails
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The 25 largest field analysis and consulting firms based in Houston, United States

Ranked by team size
Top 25 of 109 field analysis and consulting firms based in Houston, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to field analysis and consulting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 20261,001-5,0001,932 contacts →

Indirect evidence

“Employee-Owned.”

Source: RevenueBase Database · checked Sep 28, 2026
2Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 20261,001-5,0001,595 contacts →

Partial evidence

“alliant is the nation's premier consulting and management engineering firm.”

Source: RevenueBase Database · checked Sep 28, 2026
3Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 20261,001-5,0001,184 contacts →

Indirect evidence

“Consultants.”

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 20261,001-5,0001,112 contacts →

Indirect evidence

“Ranked No.”

Source: RevenueBase Database · checked Sep 28, 2026
5Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 2026201-500259 contacts →

Partial evidence

“GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202651-200116 contacts →

Indirect evidence

“Edge Engineering & Science, LLC (EDGE) is a privately owned professional services firm headquartered in Houston, Texas.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202651-20063 contacts →

Indirect evidence

“As a leader in the environmental compliance services industry, AARC does more than just meeting the needs of clients today.”

Source: RevenueBase Database · checked Sep 28, 2026
8Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 2026201-50063 contacts →

Partial evidence

“Sage ATC Environmental Consulting is now Atlas.”

Source: RevenueBase Database · checked Sep 28, 2026
9Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202651-20047 contacts →

Indirect evidence

“Riner Engineering became part of the UES family of companies in June 2023, combining our local expertise with UES’s nationwide presence and resources.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5036 contacts →

Partial evidence

“Viking Engineering, a 100% employee-owned company, is the specialty engineering and analysis arm of GATE Energy.”

Source: RevenueBase Database · checked Sep 28, 2026
11Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5034 contacts →

Partial evidence

“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: RevenueBase Database · checked Sep 28, 2026
12Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5031 contacts →

Partial evidence

“Environmental Consulting and Engineering InControl Technologies was established in 1997 to provide high-end quality environmental consulting services to owners of commercial and…”

Source: RevenueBase Database · checked Sep 28, 2026
13Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5022 contacts →

Partial evidence

“Acorn International, LLC delivers environmental and social risk management consulting services to international industry and investors.”

Source: RevenueBase Database · checked Sep 28, 2026
14Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5021 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
15Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5019 contacts →

Indirect evidence

“McDowell Owens Engineering, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
16Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5019 contacts →

Indirect evidence

“At EOSolutions, we know you want your operations to stay in compliance.”

Source: RevenueBase Database · checked Sep 28, 2026
17Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5018 contacts →

Partial evidence

“ERC is a Professional Services Firm in Environmental Consulting and Construction.”

Source: RevenueBase Database · checked Sep 28, 2026
18Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5018 contacts →

Partial evidence

“ADI Analytics is a consulting, research, and advisory firm specializing in oil and gas, power, energy, chemicals, industrials, and mining.”

Source: RevenueBase Database · checked Sep 28, 2026
19Indirect evidenceHouston, United StatesHQ checked Sep 28, 202611-5017 contacts →

Indirect evidence

“Accumyn provides independent, objective and insightful expert services to the legal profession, business, governmental entities and individuals.”

Source: RevenueBase Database · checked Sep 28, 2026
20Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5014 contacts →

Partial evidence

“Jones Engineering Solutions is a full service consulting civil engineering firm.”

Source: RevenueBase Database · checked Sep 28, 2026
21Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5014 contacts →

Indirect evidence

“Paradigm Consultants, Inc.”

Source: RevenueBase Database · checked Sep 28, 2026
22Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 20261-1014 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 28, 2026
23Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5013 contacts →

Partial evidence

“SKA Consulting is a professional environmental engineering and consulting firm providing timely, innovative solutions to today’s environmental challenges.”

Source: RevenueBase Database · checked Sep 28, 2026
24Indirect evidenceHouston, TX, United StatesHQ checked Sep 28, 20261-1012 contacts →

Indirect evidence

“For more than 50 years, CDS has helped communities, developers, economic development organizations, public agencies, and real estate professionals make informed decisions through…”

Source: RevenueBase Database · checked Sep 28, 2026
25Partial evidenceHouston, TX, United StatesHQ checked Sep 28, 202611-5012 contacts →

Partial evidence

“PTS Labs is a leading provider of Core Analysis and Geotechnical Services for the Oil and Gas Industry.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 25 of 109 field analysis and consulting firms based in Houston, United States

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Field analysis and consulting firms based in Houston, United States at a glance

As of Sep 28, 2026
56.6%Verified-email coverage
67.3Average contacts per company
1-10Median size (employees)
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
61
11-50
33
51-200
7
201-500
4
1,001-5,000
4

Email recency for this list is measured across the whole United States list rather than for Houston, so it is reported there. Company counts and contact totals on this page are exact for Houston, over 109 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 field analysis and consulting 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 Houston, United States whose own description of what they do matches “field analysis and consulting 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 field analysis and consulting 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 field analysis and consulting firms, 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 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, 4,153 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 28, 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.

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 field analysis and consulting 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 field analysis and consulting firms are there based in Houston, United States?

RevenueBase identified 109 field analysis and consulting firms 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?

LJA, headquartered in Houston, tops this list with the largest team on record.

Which city in the United States has the most field analysis and consulting firms?

Houston leads the United States with 109 headquartered companies, followed by New York (98) and Chicago (52).

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 4,153 verified decision-maker contacts tracked across these 109 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 28, 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.