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Company lists · Data refreshed September 2026

Top 25 Hydropower consulting firms based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 3,922 companies tracked

RevenueBase identified 3,922 hydropower consulting firms headquartered in the United States as of September 2026 and tracks 336,724 professional contacts across them, including 152,036 with verified work emails and 136,034 with mobile numbers. Houston is the largest hub.

This list covers hydropower consulting firms headquartered in the 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 3, 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 3, 2026 86% judged on-target in blind review
3,922Companies
336,724Contacts tracked
152,036Verified emails
136,034Mobile numbers
Unlock all 3,922 companies Free signup · no credit card · 500 free credits

The 25 largest hydropower consulting firms based in the United States

Ranked by team size
Top 25 of 3,922 hydropower consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names hydropower consulting firms: 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.
#CompanyHeadquartersEmployeesContacts
1
JacobsIndirect evidence
Dallas, TX, United StatesHQ checked Sep 3, 202610001+46,472

“At Jacobs, we're challenging today to reinvent tomorrow – delivering outcomes and solutions for the world's most complex challenges.”

Source: company website · checked Sep 3, 2026
2
Bechtel CorporationIndirect evidence
Reston, VA, United StatesHQ checked Sep 3, 202610001+24,784

“Bechtel is a trusted engineering, construction and project management partner to industry and government.”

Source: company website · checked Sep 3, 2026
3
Tetra TechPartial evidence
Pasadena, CA, United StatesHQ checked Sep 3, 202610001+13,066

“Tetra Tech is the leader in water, environment, and sustainable infrastructure, providing high-end consulting and engineering services for projects worldwide.”

Source: company website · checked Sep 3, 2026
4
WSP In The U.SIndirect evidence
New York, NY, United StatesHQ checked Sep 3, 202610001+9,318

“What if you could shape built and natural environments – and the future of those that use them?”

Source: company website · checked Sep 3, 2026
5
Sargent & LundyIndirect evidence
Chicago, TX, United StatesHQ checked Sep 3, 20261,001-5,0004,145

“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.”

Source: company website · checked Sep 3, 2026
6
Geosyntec ConsultantsPartial evidence
Boca Raton, FL, United StatesHQ checked Sep 3, 20261,001-5,0002,392

“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…”

Source: company website · checked Sep 3, 2026
7
KCIPartial evidence
Sparks, SC, United StatesHQ checked Sep 3, 20261,001-5,0002,228

“KCI is a 100-percent employee-owned engineering, consulting and construction firm serving clients throughout the United States and beyond.”

Source: company website · checked Sep 3, 2026
8
ECS Group Of CompaniesPartial evidence
Chantilly, VA, United StatesHQ checked Sep 3, 20261,001-5,0002,201

“ECS Group of Companies is a Chantilly, VA-based consulting engineering firm.”

Source: company website · checked Sep 3, 2026
9
Civil & Environmental Consultants, INCPartial evidence
Moon Township, WV, United StatesHQ checked Sep 3, 20261,001-5,0002,152

“Civil & Environmental Consultants, Inc.(CEC) provides comprehensive market-oriented consulting services that advance the strategic business objectives of its clients.”

Source: company website · checked Sep 3, 2026
10
Langan Engineering & Environmental ServicesIndirect evidence
Parsippany, CA, United StatesHQ checked Sep 3, 20261,001-5,0002,136

“Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.”

Source: company website · checked Sep 3, 2026
11
OlssonIndirect evidence
Lincoln, AZ, United StatesHQ checked Sep 3, 20261,001-5,0002,130

“Olsson is an engineering firm made up of people who craft expert solutions and designs that improve communities.”

Source: company website · checked Sep 3, 2026
12
Hazen And SawyerIndirect evidence
New York, NC, United StatesHQ checked Sep 3, 20261,001-5,0002,105

“As Hazen marks 75 years, we celebrate a legacy of absolute commitment to our clients while delivering the best technical work available anywhere.”

Source: company website · checked Sep 3, 2026
13
LJAIndirect evidence
Multiple Locations, FL, United StatesHQ checked Sep 3, 20261,001-5,0002,073

“Employee-Owned.”

Source: company website · checked Sep 3, 2026
14
Enercon Services, INCIndirect evidence
Kennesaw, FL, United StatesHQ checked Sep 3, 20261,001-5,0001,840

“ENERCON is a multi-discipline engineering and environmental engineering support services firm focused on delivering safe and efficient solutions for the power, data center and…”

Source: company website · checked Sep 3, 2026
15
Carollo EngineersIndirect evidence
Walnut Creek, OK, United StatesHQ checked Sep 3, 20261,001-5,0001,709

“For more than 90 years, Carollo Engineers has been dedicated exclusively to water and wastewater solutions.”

Source: company website · checked Sep 3, 2026
16
Johnson, Mirmiran & ThompsonPartial evidence
Serving Clients Across The Us, DE, United StatesHQ checked Sep 3, 20261,001-5,0001,677

“Johnson, Mirmiran & Thompson is an employee owned, multi-disciplined firm offering a full array of planning, design, and construction phase consulting services for infrastructure…”

Source: company website · checked Sep 3, 2026
17
CHA Consulting, INCPartial evidence
Albany, NY, United StatesHQ checked Sep 3, 20261,001-5,0001,650

“CHA Consulting, Inc.(CHA) is an innovative, full-service engineering, design, consulting, and program/construction management firm providing a wide range of technology-enhanced…”

Source: company website · checked Sep 3, 2026
18
Bowman ConsultingIndirect evidence
Reston, VA, United StatesHQ checked Sep 3, 20261,001-5,0001,645

“Headquartered in Reston, Virginia, Bowman is a national engineering services firm delivering infrastructure solutions to customers who own, develop and maintain the built…”

Source: company website · checked Sep 3, 2026
19
Rk&kIndirect evidence
Baltimore, DE, United StatesHQ checked Sep 3, 20261,001-5,0001,639

“RK & K is a full-service planning, engineering, environmental, and construction management/inspection firm serving a wide range of clients throughout the United States.”

Source: company website · checked Sep 3, 2026
20
Westwood Professional ServicesIndirect evidence
Plano, LA, United StatesHQ checked Sep 3, 20261,001-5,0001,631

“At Westwood, our purpose is to create a better world for people through our work.”

Source: company website · checked Sep 3, 2026
21
Swca Environmental ConsultantsPartial evidence
Phoenix, AZ, United StatesHQ checked Sep 3, 20261,001-5,0001,618

“Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.”

Source: company website · checked Sep 3, 2026
22
GEI Consultants, INCIndirect evidence
Woburn, MA, United StatesHQ checked Sep 3, 20261,001-5,0001,577
Source: company website · checked Sep 3, 2026
23
UESIndirect evidence
Orlando, TX, United StatesHQ checked Sep 3, 20261,001-5,0001,571

“UES provides professional engineering, environmental, testing and inspection services to clients across the United States.”

Source: company website · checked Sep 3, 2026
24
Freese And NicholsPartial evidence
Fort Worth, NC, United StatesHQ checked Sep 3, 20261,001-5,0001,461

“Freese and Nichols is a professional planning, consulting and engineering firm serving clients across the United States.”

Source: company website · checked Sep 3, 2026
25
Davey Resource Group, INCIndirect evidence
Kent, OH, United StatesHQ checked Sep 3, 20261,001-5,0001,407

“We are officially known as Davey Resource Group Inc, but we are more likely to come up in conversation around a successful project we've completed for a client or a capability we…”

Source: company website · checked Sep 3, 2026

Showing 25 of 3,922 hydropower consulting firms based in the United States

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Hydropower consulting firms based in the United States at a glance

As of Sep 3, 2026
11-50Median size (employees)
HoustonLargest hub · 107 HQs
136,034Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
1,586
11-50
1,422
51-200
582
201-500
163
501-1,000
69
1,001-5,000
71
10001+
10

Verified emails by last verification

0–30
0
31–60
13,035
61–90
87,125
90–180
50,319
180+
1,557

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 hydropower consulting firms, 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 the United States whose own description of what they do matches “hydropower consulting firms”. 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 hydropower consulting firms, and records with no verified work email. Companies headquartered outside United States 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, 152,036 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 3, 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.

Hydropower consulting firms by metro

  • Hydropower consulting firms in Houston107
  • Hydropower consulting firms in Austin49
  • Hydropower consulting firms in New York39
  • Hydropower consulting firms in Tampa38
  • Hydropower consulting firms in Portland36
  • Hydropower consulting firms in Denver32
  • Hydropower consulting firms in Dallas32
  • Hydropower consulting firms in San Diego31

Frequently asked

How many hydropower consulting firms are there based in the United States?

RevenueBase identified 3,922 hydropower consulting firms headquartered in the 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?

Jacobs, headquartered in Dallas, tops this list with the largest team on record.

Which city has the most hydropower consulting firms?

Houston leads with 107 headquartered companies, followed by Austin (49) and New York (39).

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 152,036 verified decision-maker contacts tracked across these 3,922 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 3, 2026.

Ready to reach these companies? Verified emails and direct dials for all 3,922 hydropower consulting firms based in the United States. Start with a free account, no credit card.

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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.

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