Company lists · Data refreshed October 2026
Top 25 Hydrology engineering firms based in the United States
RevenueBase identified 1,723 company matches for hydrology engineering firms associated with the United States as of October 2026 and tracks 171,111 professional contacts across them, including 73,257 with verified work emails. Houston is the largest hub.
This list covers company matches for hydrology engineering firms associated with the 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 October 14, 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.
The 25 largest hydrology engineering firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 65,956 contacts → | ||||
Exact match “AECOM is the global infrastructure leader, committed to delivering a better world.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 2 | 13,725 contacts → | ||||
Exact match “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 3 | 7,832 contacts → | ||||
Exact match “CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 4 | 6,380 contacts → | ||||
Exact match “Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 5 | 4,415 contacts → | ||||
Exact match “Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 6 | 2,521 contacts → | ||||
Exact match “Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 7 | 2,510 contacts → | ||||
Exact match “Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 8 | 2,259 contacts → | ||||
Exact match “ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 9 | 2,251 contacts → | ||||
Exact match “As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 10 | 2,229 contacts → | ||||
Exact match “Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 11 | 1,811 contacts → | ||||
Exact match “For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 12 | 1,639 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 13 | 1,551 contacts → | ||||
Exact match “Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 14 | 1,266 contacts → | ||||
Exact match “Who is Apex?” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 15 | 1,201 contacts → | ||||
Exact match “Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 16 | 1,165 contacts → | ||||
Exact match “Moffatt & Nichol is a leading U.S-based global infrastructure advisor specializing in the planning and design of facilities that shape and serve our coastlines, harbors and…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 17 | 903 contacts → | ||||
Exact match “Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 18 | 899 contacts → | ||||
Exact match “At Parametrix, we help our clients imagine what's possible.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 19 | 807 contacts → | ||||
Exact match “Dudek is an environmental, planning, and engineering consulting firm.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 20 | 785 contacts → | ||||
Exact match “This page is now closed.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 21 | 769 contacts → | ||||
Exact match “Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 22 | 759 contacts → | ||||
Exact match “Schnabel is a trusted partner in building the foundation for project success.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 23 | 756 contacts → | ||||
Exact match “At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 24 | 602 contacts → | ||||
Exact match “Founded in 1968, Raba Kistner Inc.” Recorded in the RevenueBase company graph · Oct 14, 2026 · View company records in RevenueBase | |||||
| 25 | 580 contacts → | ||||
Exact match “For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded in the RevenueBase company graph · Oct 14, 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 “hydrology engineering firms”. 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 1,723 hydrology engineering firms based in the United States
See the full list, filter by size, metro and specialty, and access 73,257 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Hydrology engineering firms based in the United States at a glance
As of Oct 14, 2026Companies by employee count
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 1,723 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 the United States whose business descriptions match “hydrology 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 73,257 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 October 14, 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.
Hydrology engineering firms by metro
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 “hydrology engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many hydrology engineering firms are there based in the United States?
RevenueBase identified 1,723 company matches for hydrology engineering firms associated with the United States as of October 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?
AECOM tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most hydrology engineering firms?
Houston leads with 36 company records, followed by Austin (21) and Seattle (18).
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 73,257 professional contacts with verified work emails tracked across these 1,723 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 October 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 1,723 hydrology engineering firms based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Hydrology engineering firms by geography
- Hydrology engineering firms based in Belo Horizonte, Brazil
- Hydrology engineering firms based in Ankara, Türkiye
- Hydrology engineering firms based in Houston, United States
- Hydrology engineering firms based in Australia
- Hydrology engineering firms based in Austria
- Hydrology engineering firms based in Brazil
- Hydrology engineering firms based in Canada
- Hydrology engineering firms based in Chile
- Hydrology engineering firms based in Colombia
- Hydrology engineering firms based in France
- Hydrology engineering firms based in Germany
- Hydrology engineering firms based in Greece
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Hydrology engineering firms based in Belo Horizonte, Brazil
- Hydrology engineering firms based in Ankara, Türkiye
- Hydrology engineering firms based in Houston, United States
- Hydrology engineering firms based in Australia
- Hydrology engineering firms based in Austria
- Hydrology engineering firms based in Brazil
Company intelligence · public preview
Top 25 hydrology engineering firms based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 1,723 matching company records for hydrology engineering firms based in the United States, with 171,111 tracked contacts and 73,257 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 14, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 hydrology engineering firms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  AECOMaecom.comHQ: Dallas, TX, United StatesReported employees: 10001+ | Dallas, TX, United States | 10001+ | Exact match | 65,956 contacts → |
“AECOM is the global infrastructure leader, committed to delivering a better world.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Tetra Techtetratech.comHQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 13,725 contacts → |
“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  CDM Smithcdmsmith.comHQ: Boston, MA, United StatesReported employees: 5,001-10,000 | Boston, MA, United States | 5,001-10,000 | Exact match | 7,832 contacts → |
“CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Terraconterracon.comHQ: Olathe, KS, United StatesReported employees: 5,001-10,000 | Olathe, KS, United States | 5,001-10,000 | Exact match | 6,380 contacts → |
“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Michael Baker Internationalmbakerintl.comHQ: Pittsburgh, PA, United StatesReported employees: 5,001-10,000 | Pittsburgh, PA, United States | 5,001-10,000 | Exact match | 4,415 contacts → |
“Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Geosyntec Consultantsgeosyntec.comHQ: Boca Raton, FL, United StatesReported employees: 1,001-5,000 | Boca Raton, FL, United States | 1,001-5,000 | Exact match | 2,521 contacts → |
“Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Brown And Caldwellbrownandcaldwell.comHQ: Walnut Creek, CA, United StatesReported employees: 1,001-5,000 | Walnut Creek, CA, United States | 1,001-5,000 | Exact match | 2,510 contacts → |
“Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  ECS Group Of Companiesecslimited.comHQ: Chantilly, VA, United StatesReported employees: 1,001-5,000 | Chantilly, VA, United States | 1,001-5,000 | Exact match | 2,259 contacts → |
“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Hazen And Sawyerhazenandsawyer.comHQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 2,251 contacts → |
“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Olssonolsson.comHQ: Lincoln, NE, United StatesReported employees: 1,001-5,000 | Lincoln, NE, United States | 1,001-5,000 | Exact match | 2,229 contacts → |
“Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Carollo Engineerscarollo.comHQ: Walnut Creek, CA, United StatesReported employees: 1,001-5,000 | Walnut Creek, CA, United States | 1,001-5,000 | Exact match | 1,811 contacts → |
“For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  GEI Consultants, INCgeiconsultants.comHQ: Woburn, MA, United StatesReported employees: 1,001-5,000 | Woburn, MA, United States | 1,001-5,000 | Exact match | 1,639 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 |  Freese And Nicholsfreese.comHQ: Fort Worth, TX, United StatesReported employees: 1,001-5,000 | Fort Worth, TX, United States | 1,001-5,000 | Exact match | 1,551 contacts → |
“Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Apex Companiesapexcos.comHQ: Rockville, MD, United StatesReported employees: 1,001-5,000 | Rockville, MD, United States | 1,001-5,000 | Exact match | 1,266 contacts → |
“Who is Apex?” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Volkert, INCvolkert.comHQ: Mobile, AL, United StatesReported employees: 1,001-5,000 | Mobile, AL, United States | 1,001-5,000 | Exact match | 1,201 contacts → |
“Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Moffatt & Nicholmoffattnichol.comHQ: Long Beach, CA, United StatesReported employees: 1,001-5,000 | Long Beach, CA, United States | 1,001-5,000 | Exact match | 1,165 contacts → |
“Moffatt & Nichol is a leading U.S-based global infrastructure advisor specializing in the planning and design of facilities that shape and serve our coastlines, harbors and…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  GZA Geoenvironmental, INCgza.comHQ: Norwood, MA, United StatesReported employees: 501-1,000 | Norwood, MA, United States | 501-1,000 | Exact match | 903 contacts → |
“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Parametrixparametrix.comHQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 899 contacts → |
“At Parametrix, we help our clients imagine what's possible.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  DUDEKdudek.comHQ: Encinitas, CA, United StatesReported employees: 501-1,000 | Encinitas, CA, United States | 501-1,000 | Exact match | 807 contacts → |
“Dudek is an environmental, planning, and engineering consulting firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Hatch Mott Macdonaldhatchmott.comHQ: Iselin, NJ, United StatesReported employees: 1,001-5,000 | Iselin, NJ, United States | 1,001-5,000 | Exact match | 785 contacts → |
“This page is now closed.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Psomaspsomas.comHQ: Los Angeles, CA, United StatesReported employees: 501-1,000 | Los Angeles, CA, United States | 501-1,000 | Exact match | 769 contacts → |
“Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Schnabel Engineeringschnabel-eng.comHQ: Glen Allen, VA, United StatesReported employees: 501-1,000 | Glen Allen, VA, United States | 501-1,000 | Exact match | 759 contacts → |
“Schnabel is a trusted partner in building the foundation for project success.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Shimmick Corporationshimmick.comHQ: Irvine, CA, United StatesReported employees: 1,001-5,000 | Irvine, CA, United States | 1,001-5,000 | Exact match | 756 contacts → |
“At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Raba Kistner, INCrkci.comHQ: San Antonio, TX, United StatesReported employees: 501-1,000 | San Antonio, TX, United States | 501-1,000 | Exact match | 602 contacts → |
“Founded in 1968, Raba Kistner Inc.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Kennedy Jenkskennedyjenks.comHQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 580 contacts → |
“For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 1,723 company matches
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Hydrology engineering firms: dataset insights
October 14, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,720 records in the displayed employee bands.
3 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,723 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 14, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Hydrology engineering firms by metro
Questions about this company list
What does Exact match mean for hydrology engineering firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many hydrology engineering firms did RevenueBase find based in the United States?
The saved snapshot records 1,723 matching company records, 171,111 tracked contacts and 73,257 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 14, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Hydrology engineering firms by geography
- Hydrology engineering firms based in Belo Horizonte, Brazil
- Hydrology engineering firms based in Ankara, Türkiye
- Hydrology engineering firms based in Houston, United States
- Hydrology engineering firms based in Australia
- Hydrology engineering firms based in Austria
- Hydrology engineering firms based in Brazil
- Hydrology engineering firms based in Canada
- Hydrology engineering firms based in Chile
- Hydrology engineering firms based in Colombia
- Hydrology engineering firms based in France
- Hydrology engineering firms based in Germany
- Hydrology engineering firms based in Greece
Cite this list
RevenueBase Data Team. Top 25 hydrology engineering firms based in the United States. Snapshot: October 14, 2026. https://revenuebase.ai/companies/hydrology-engineering-firms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Hydrology engineering firms based in Belo Horizonte, Brazil
- Hydrology engineering firms based in Ankara, Türkiye
- Hydrology engineering firms based in Houston, United States
- Hydrology engineering firms based in Australia
- Hydrology engineering firms based in Austria
- Hydrology engineering firms based in Brazil
Company intelligence · public preview
Top 25 hydrology engineering firms based in the United States
RevenueBase records 1,723 matching company records for hydrology engineering firms based in the United States, with 171,111 tracked contacts and 73,257 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 14, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 hydrology engineering firms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | AECOMaecom.com HQ: Dallas, TX, United StatesReported employees: 10001+ | Dallas, TX, United States | 10001+ | Exact match | 65,956 contacts → |
“AECOM is the global infrastructure leader, committed to delivering a better world.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Tetra Techtetratech.com HQ: Pasadena, CA, United StatesReported employees: 10001+ | Pasadena, CA, United States | 10001+ | Exact match | 13,725 contacts → |
“Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | CDM Smithcdmsmith.com HQ: Boston, MA, United StatesReported employees: 5,001-10,000 | Boston, MA, United States | 5,001-10,000 | Exact match | 7,832 contacts → |
“CDM Smith is shaping what’s next, now, with world class solutions in water, environment, transportation and energy to public and private clients worldwide.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Terraconterracon.com HQ: Olathe, KS, United StatesReported employees: 5,001-10,000 | Olathe, KS, United States | 5,001-10,000 | Exact match | 6,380 contacts → |
“Terracon is a 100 percent employee-owned consulting engineering firm providing quality services to clients.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Michael Baker Internationalmbakerintl.com HQ: Pittsburgh, PA, United StatesReported employees: 5,001-10,000 | Pittsburgh, PA, United States | 5,001-10,000 | Exact match | 4,415 contacts → |
“Michael Baker International is a leading provider of engineering, consulting, and technology services spanning four Verticals: Infrastructure, Places and Facilities, Federal and…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Geosyntec Consultantsgeosyntec.com HQ: Boca Raton, FL, United StatesReported employees: 1,001-5,000 | Boca Raton, FL, United States | 1,001-5,000 | Exact match | 2,521 contacts → |
“Geosyntec is a consulting and engineering firm that works with private and public sector clients to address new ventures and complex problems involving our environment, natural…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Brown And Caldwellbrownandcaldwell.com HQ: Walnut Creek, CA, United StatesReported employees: 1,001-5,000 | Walnut Creek, CA, United States | 1,001-5,000 | Exact match | 2,510 contacts → |
“Headquartered in Walnut Creek, Calif, Brown and Caldwell is an employee-owned firm with 2,100+ professionals serving clients locally and globally from 52 locations.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | ECS Group Of Companiesecslimited.com HQ: Chantilly, VA, United StatesReported employees: 1,001-5,000 | Chantilly, VA, United States | 1,001-5,000 | Exact match | 2,259 contacts → |
“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Hazen And Sawyerhazenandsawyer.com HQ: New York, NY, United StatesReported employees: 1,001-5,000 | New York, NY, United States | 1,001-5,000 | Exact match | 2,251 contacts → |
“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Olssonolsson.com HQ: Lincoln, NE, United StatesReported employees: 1,001-5,000 | Lincoln, NE, United States | 1,001-5,000 | Exact match | 2,229 contacts → |
“Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Carollo Engineerscarollo.com HQ: Walnut Creek, CA, United StatesReported employees: 1,001-5,000 | Walnut Creek, CA, United States | 1,001-5,000 | Exact match | 1,811 contacts → |
“For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | GEI Consultants, INCgeiconsultants.com HQ: Woburn, MA, United StatesReported employees: 1,001-5,000 | Woburn, MA, United States | 1,001-5,000 | Exact match | 1,639 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 13 | Freese And Nicholsfreese.com HQ: Fort Worth, TX, United StatesReported employees: 1,001-5,000 | Fort Worth, TX, United States | 1,001-5,000 | Exact match | 1,551 contacts → |
“Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Apex Companiesapexcos.com HQ: Rockville, MD, United StatesReported employees: 1,001-5,000 | Rockville, MD, United States | 1,001-5,000 | Exact match | 1,266 contacts → |
“Who is Apex?” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Volkert, INCvolkert.com HQ: Mobile, AL, United StatesReported employees: 1,001-5,000 | Mobile, AL, United States | 1,001-5,000 | Exact match | 1,201 contacts → |
“Volkert’s history began in 1925 when it was founded in New Orleans as Doullut & Erwin to provide waterfront and heavy construction services, as well as airport design services…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Moffatt & Nicholmoffattnichol.com HQ: Long Beach, CA, United StatesReported employees: 1,001-5,000 | Long Beach, CA, United States | 1,001-5,000 | Exact match | 1,165 contacts → |
“Moffatt & Nichol is a leading U.S-based global infrastructure advisor specializing in the planning and design of facilities that shape and serve our coastlines, harbors and…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | GZA Geoenvironmental, INCgza.com HQ: Norwood, MA, United StatesReported employees: 501-1,000 | Norwood, MA, United States | 501-1,000 | Exact match | 903 contacts → |
“Founded in 1964 as a soils and foundations specialty consultant, GZA GeoEnvironmental, Inc.(GZA) has grown into a full-service company providing its clients with highly…” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Parametrixparametrix.com HQ: Seattle, WA, United StatesReported employees: 501-1,000 | Seattle, WA, United States | 501-1,000 | Exact match | 899 contacts → |
“At Parametrix, we help our clients imagine what's possible.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | DUDEKdudek.com HQ: Encinitas, CA, United StatesReported employees: 501-1,000 | Encinitas, CA, United States | 501-1,000 | Exact match | 807 contacts → |
“Dudek is an environmental, planning, and engineering consulting firm.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Hatch Mott Macdonaldhatchmott.com HQ: Iselin, NJ, United StatesReported employees: 1,001-5,000 | Iselin, NJ, United States | 1,001-5,000 | Exact match | 785 contacts → |
“This page is now closed.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Psomaspsomas.com HQ: Los Angeles, CA, United StatesReported employees: 501-1,000 | Los Angeles, CA, United States | 501-1,000 | Exact match | 769 contacts → |
“Our award-winning projects are produced through innovation, creativity, and technical expertise.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Schnabel Engineeringschnabel-eng.com HQ: Glen Allen, VA, United StatesReported employees: 501-1,000 | Glen Allen, VA, United States | 501-1,000 | Exact match | 759 contacts → |
“Schnabel is a trusted partner in building the foundation for project success.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Shimmick Corporationshimmick.com HQ: Irvine, CA, United StatesReported employees: 1,001-5,000 | Irvine, CA, United States | 1,001-5,000 | Exact match | 756 contacts → |
“At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Raba Kistner, INCrkci.com HQ: San Antonio, TX, United StatesReported employees: 501-1,000 | San Antonio, TX, United States | 501-1,000 | Exact match | 602 contacts → |
“Founded in 1968, Raba Kistner Inc.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Kennedy Jenkskennedyjenks.com HQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 580 contacts → |
“For over 100 years, Kennedy Jenks has provided engineering and scientific solutions for innovative water and environmental projects.” Recorded description excerpt · October 14, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Hydrology engineering firms: dataset insights
October 14, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
1,720 records in the displayed employee bands.
3 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 1,723 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 14, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Hydrology engineering firms by metro
Questions about this company list
What does Exact match mean for hydrology engineering firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many hydrology engineering firms did RevenueBase find based in the United States?
The saved snapshot records 1,723 matching company records, 171,111 tracked contacts and 73,257 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 14, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Hydrology engineering firms by geography
- Hydrology engineering firms based in Belo Horizonte, Brazil
- Hydrology engineering firms based in Ankara, Türkiye
- Hydrology engineering firms based in Houston, United States
- Hydrology engineering firms based in Australia
- Hydrology engineering firms based in Austria
- Hydrology engineering firms based in Brazil
- Hydrology engineering firms based in Canada
- Hydrology engineering firms based in Chile
- Hydrology engineering firms based in Colombia
- Hydrology engineering firms based in France
- Hydrology engineering firms based in Germany
- Hydrology engineering firms based in Greece
Cite this list
RevenueBase Data Team. Top 25 hydrology engineering firms based in the United States. Snapshot: October 14, 2026. https://revenuebase.ai/companies/hydrology-engineering-firms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Hydrology engineering firms based in Belo Horizonte, Brazil
- Hydrology engineering firms based in Ankara, Türkiye
- Hydrology engineering firms based in Houston, United States
- Hydrology engineering firms based in Australia
- Hydrology engineering firms based in Austria
- Hydrology engineering firms based in Brazil