Company lists · Data refreshed September 2026

Top 25 Water resources engineering firms based in Houston, United States

RevenueBase identified 65 company matches for water resources engineering firms associated with Houston, United States as of September 2026 and tracks 5,637 professional contacts across them, including 3,235 with verified work emails. Across the United States, Houston is the largest hub for this category.

This list covers company matches for water resources engineering firms associated with Houston, 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 19, 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 19, 2026 How this list was built
65Companies
5,637Contacts tracked
3,235Verified emails
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The 25 largest water resources engineering firms based in Houston, United States

Ranked by team size
Top 25 of 65 company matches for water resources engineering firms based in Houston, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261,001-5,0001,932 contacts →

Exact match

“Employee-Owned.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261,001-5,0001,112 contacts →

Exact match

“Ranked No.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Sep 19, 2026501-1,000683 contacts →

Exact match

“Quiddity is an award-winning, full-service civil engineering, planning, surveying, and consulting firm providing innovative solutions for public infrastructure and private…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchHouston, TX, United StatesHQ recorded Sep 19, 2026201-500461 contacts →

Exact match

“Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchHouston, TX, United StatesHQ recorded Sep 19, 2026201-500259 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20079 contacts →

Exact match

“Founded in 1984, OMEGA is an engineering and construction management firm specializing in infrastructure, civil engineering, highway engineering, transportation planning, railway…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20079 contacts →

Exact match

“The objective of A&S is to provide municipal engineering services, with focus on water districts, municipalities, and land development.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20065 contacts →

Exact match

“Civitas Engineering Group Inc.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20064 contacts →

Exact match

“Infrastructure Consulting & Engineering, LLC (formerly IDCUS Inc.), is a leading Texas-based professional services, civil engineering, and consulting firm specializing in public…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5059 contacts →

Exact match

“Odyssey Engineering Group is a Houston based civil engineering consulting firm.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20051 contacts →

Exact match

“Since 2008… JDM Group Company has been providing consulting and construction services for both public and private sector clients in a cost effective, timely, and innovative manner.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20047 contacts →

Exact match

“RAVA is a Houston, TX based construction and consulting firm specializing in construction projects including commercial buildings and waterworks facilities.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5046 contacts →

Exact match

“Blackline Engineering, LLC is a Houston based engineering consulting firm that offers innovative design and project management services that are tailored for each client.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5035 contacts →

Exact match

“Vogler & Spencer Engineering provides civil engineering consulting services to public and private clients in the Houston area and surrounding counties.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20031 contacts →

Exact match

“Gunda Corporation (GUNDA) is a Houston-based consulting firm that provides planning, engineering and management services in all aspects of engineering, including traffic &…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5031 contacts →

Exact match

“Aurora Technical Services, LLC is a Houston-based civil engineering consulting firm that provides engineering expertise focused on water and wastewater pipelines.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5021 contacts →

Exact match

“Kenall is a SB and W/M/DBE company committed to providing civil engineering, geotechnical engineering, transportation engineering, water resources planning, environmental…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5021 contacts →

Exact match

“Momentum provides services for a wide variety of public and private clients.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202651-20019 contacts →

Exact match

“SIA Solutions LLC (SIA) has merged with Salas O'Brien and continues to focus on program and project-specific engineering and technical solutions in Environmental Consulting…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5018 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5014 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5014 contacts →

Exact match

“Award winning Zarinkelk Engineering Services, Inc.(ZESI), established in 2001, is a Houston, Texas-based, woman-owned, consulting engineering firm.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5013 contacts →

Exact match

“Cascade Civil Services (Cascade) is a full-service Houston-based civil engineering firm that specializes in providing drainage analysis and design services to our clients.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24Exact matchHouston, TX, United StatesHQ recorded Sep 19, 202611-5013 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25Exact matchHouston, TX, United StatesHQ recorded Sep 19, 20261-1012 contacts →

Exact match

“Founded in 1988, Lentz Engineering, LLC is a civil engineering and consulting firm providing services in Austin, Houston, and the surrounding cities.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 25 of 65 water resources engineering firms based in Houston, United States

See the full list, filter by size, metro and specialty, and access 3,235 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Water resources engineering firms based in Houston, United States at a glance

As of Sep 19, 2026
57.4%Verified-email coverage
86.7Average contacts per company
11-50Median size (employees)
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
21
11-50
26
51-200
13
201-500
2
501-1,000
1
1,001-5,000
2

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 65 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 Houston, United States whose business descriptions match “water resources engineering firms” 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 3,235 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 19, 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.

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 “water resources engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many water resources engineering firms are there based in Houston, United States?

RevenueBase identified 65 company matches for water resources engineering firms associated with Houston, 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?

LJA 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 water resources engineering firms?

Houston leads the United States with 65 company records, followed by Tampa (34) and Austin (32).

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 3,235 professional contacts with verified work emails tracked across these 65 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 19, 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.