Company lists · Data refreshed September 2026

Top 25 Hydropower engineering consultancy companies based in the United States

Name: Hydropower engineering consultancy companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 1,421 companies tracked

RevenueBase identified 1,421 hydropower engineering consultancy companies headquartered in the United States as of September 2026 and tracks 57,391 professional contacts across them, including 27,561 with verified work emails and 23,215 with mobile numbers. Houston is the largest hub.

This list covers hydropower engineering consultancy companies 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

1,421Companies

57,391Contacts tracked

27,561Verified emails

23,215Mobile numbers

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The 25 largest hydropower engineering consultancy companies based in the United States

Ranked by team size

Top 25 of 1,421 hydropower engineering consultancy companies 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 engineering consultancy companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Tetra TechPartial evidence	Pasadena, CA, United StatesHQ checked Sep 3, 2026	10001+	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
2	Hazen And SawyerIndirect evidence	New York, NC, United StatesHQ checked Sep 3, 2026	1,001-5,000	2,105
	“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
3	GEI Consultants, INCIndirect evidence	Woburn, MA, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,577
	Source: company website · checked Sep 3, 2026
4	Davey Resource Group, INCIndirect evidence	Kent, OH, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,407
	“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
5	UlteigPartial evidence	Fargo, CO, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,360
	“Ulteig delivers comprehensive design engineering, program management and technical and field services that strengthen infrastructure vital to everyday life.” Source: company website · checked Sep 3, 2026
6	Atwell, LLCPartial evidence	Southfield, MI, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,291
	“Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Source: company website · checked Sep 3, 2026
7	Barr Engineering COPartial evidence	Minneapolis, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,098
	“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Source: company website · checked Sep 3, 2026
8	GAI Consultants, INCStrong evidence	Homestead, MI, United StatesHQ checked Sep 3, 2026	501-1,000	976
	“Transforming ideas into reality® since 1958, GAI Consultants is an engineering, planning, and environmental consulting firm that provides customized solutions and local expertise…” Source: company website · checked Sep 3, 2026
9	DUDEKPartial evidence	Encinitas, CA, United StatesHQ checked Sep 3, 2026	501-1,000	792
	“Dudek is an environmental, planning, and engineering consulting firm.” Source: company website · checked Sep 3, 2026
10	Shimmick CorporationIndirect evidence	Irvine, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	753
	“At Shimmick (NASDAQ: SHIM), we’re shaping the future of sustainable infrastructure through innovative solutions that advance communities and protect our environment.” Source: company website · checked Sep 3, 2026
11	Whitman, Requardt And Associates, LLPPartial evidence	Baltimore, VA, United StatesHQ checked Sep 3, 2026	501-1,000	604
	“Established in 1915, WRA is a nationally-recognized engineering, architectural and environmental planning firm with a reputation for delivering exceptional work on time and within…” Source: company website · checked Sep 3, 2026
12	E2 Consulting Engineers, INCPartial evidence	Emeryville, WV, United StatesHQ checked Sep 3, 2026	501-1,000	523
	“Dedicated to “Excellence in Engineering,” E2 Consulting Engineers, Inc.(E2) is a professional services firm established in 1988 specializing in a full spectrum of engineering…” Source: company website · checked Sep 3, 2026
13	Thomas & HuttonPartial evidence	Savannah, GA, United StatesHQ checked Sep 3, 2026	501-1,000	483
	“Our story began in 1946 with the collaboration of former US Army Corps of Engineers Officers, Hue Thomas and Joe Hutton, in their start-up engineering firm in Savannah, GA.” Source: company website · checked Sep 3, 2026
14	Anvil CorporationPartial evidence	Bellingham, WA, United StatesHQ checked Sep 3, 2026	201-500	465
	“Founded in 1971, Anvil Corporation is a 100% employee-owned engineering firm providing multi-discipline engineering, design, project management, procurement, and construction…” Source: company website · checked Sep 3, 2026
15	Geo-Technology Associates, Inc. GTAIndirect evidence	Abingdon, MD, United StatesHQ checked Sep 3, 2026	501-1,000	457
	“Geo-Technology Associates, Inc.(GTA) proudly celebrates more than 40 years of service, backed by a team of 600+ professionals-including geotechnical engineers, environmental…” Source: company website · checked Sep 3, 2026
16	AmpiricalPartial evidence	Covington, CA, United StatesHQ checked Sep 3, 2026	501-1,000	453
	“With an enduring commitment to Engineering Power-ful Solutions, Ampirical offers services with a focus on outstanding quality, value added engineering and successful project…” Source: company website · checked Sep 3, 2026
17	Lockwood, Andrews & Newnam, Inc. LANPartial evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	201-500	453
	“Lockwood, Andrews & Newnam, Inc.(LAN) is a full-service consulting firm offering planning, engineering and program management services.” Source: company website · checked Sep 3, 2026
18	Strand Associates, INCIndirect evidence	Madison, WI, United StatesHQ checked Sep 3, 2026	501-1,000	443
	Source: company website · checked Sep 3, 2026
19	Recon Management Services, INCPartial evidence	Sulphur, LA, United StatesHQ checked Sep 3, 2026	501-1,000	424
	“ReCon was established in 1995 and has matured as a high quality and competitive engineering consulting firm providing engineering design and project management services to the…” Source: company website · checked Sep 3, 2026
20	Manhard ConsultingPartial evidence	Lincolnshire, TX, United StatesHQ checked Sep 3, 2026	201-500	373
	“Manhard Consulting has joined Atwell, a national consulting, engineering, and construction services firm with 2,100 technical professionals across the country.” Source: company website · checked Sep 3, 2026
21	Herbert, Rowland & Grubic, Inc. - HRGIndirect evidence	Harrisburg, PA, United StatesHQ checked Sep 3, 2026	201-500	372
	“HRG assists with the planning, design, and management of community infrastructure.” Source: company website · checked Sep 3, 2026
22	Metric EngineeringPartial evidence	Miami, FL, United StatesHQ checked Sep 3, 2026	201-500	343
	“Metric Engineering, Inc.” Source: company website · checked Sep 3, 2026
23	NEI Electric Power Engineering, INCPartial evidence	Lakewood, CO, United StatesHQ checked Sep 3, 2026	201-500	322
	“NEI provides professional expertise and design engineering services for all aspects of power systems engineering.” Source: company website · checked Sep 3, 2026
24	Bb&e Consulting Engineers And ProfessionalsPartial evidence	Northville, AL, United StatesHQ checked Sep 3, 2026	201-500	317
	“BB & E, Inc.(BB & E) is an employee-owned firm specializing in civil, energy, and environmental engineering.” Source: company website · checked Sep 3, 2026
25	Commonwealth Associates, INCPartial evidence	Jackson, GA, United StatesHQ checked Sep 3, 2026	201-500	301
	“We provide expert engineering and consulting services that enable a more reliable and resilient power system.” Source: company website · checked Sep 3, 2026

Showing 25 of 1,421 hydropower engineering consultancy companies based in the United States

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Hydropower engineering consultancy companies based in the United States at a glance

As of Sep 3, 2026

11-50Median size (employees)

HoustonLargest hub · 54 HQs

23,215Contacts with mobile numbers

Sep 3, 2026Data refreshed

Companies by employee count

1-10

705

11-50

471

51-200

166

201-500

501-1,000

1,001-5,000

10001+

Verified emails by last verification

0–30

31–60

2,394

61–90

15,830

90–180

9,155

180+

182

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 engineering consultancy companies, 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 engineering consultancy companies”. 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 engineering consultancy companies, 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, 27,561 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 engineering consultancy companies by metro

Hydropower engineering consultancy companies in Houston54

Frequently asked

How many hydropower engineering consultancy companies are there based in the United States?

RevenueBase identified 1,421 hydropower engineering consultancy companies 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?

Tetra Tech, headquartered in Pasadena, tops this list with the largest team on record.

Which city has the most hydropower engineering consultancy companies?

Houston leads with 54 headquartered companies, followed by Austin (22) and Denver (15).

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 27,561 verified decision-maker contacts tracked across these 1,421 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.

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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.