Company lists · Data refreshed September 2026

Top 25 Hydroelectric power consultants based in the United States

Name: Hydroelectric power consultants based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 150 companies tracked

RevenueBase identified 150 hydroelectric power consultants headquartered in the United States as of September 2026 and tracks 15,057 professional contacts across them, including 6,324 with verified work emails. Denver is the largest hub.

This list covers hydroelectric power consultants 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

150Companies

15,057Contacts tracked

6,324Verified emails

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The 25 largest hydroelectric power consultants based in the United States

Ranked by team size

Top 25 of 150 hydroelectric power consultants based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydroelectric power consultants: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Tetra Tech	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 20, 2026	10001+	12,999 contacts →
	Indirect evidence “Tetra Tech is the leader in water, environment and sustainable infrastructure, providing high-end technical and engineering services for projects worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
2	West Yost	Indirect evidence	Davis, CA, United StatesHQ checked Sep 20, 2026	201-500	279 contacts →
	Indirect evidence “West Yost is a water-focused consulting engineering firm ranked by Fortune Magazine as one of the “Best Small and Medium Workplaces in Consulting and Professional Services” 2023 -…” Source: RevenueBase Database · checked Sep 20, 2026
3	Rizzo International	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 20, 2026	51-200	165 contacts →
	Indirect evidence “RIZZO International, Inc.(RIZZO) is a global engineering and consulting firm headquartered in Pittsburgh, Pennsylvania US.” Source: RevenueBase Database · checked Sep 20, 2026
4	PSE Engineers & Consultants	Indirect evidence	Madison, WI, United StatesHQ checked Sep 20, 2026	51-200	157 contacts →
	Indirect evidence “PSE is an electrical energy expert that provides relationship-driven engineering and consulting services for forward-thinking partners who pursue long-term energy solutions.” Source: RevenueBase Database · checked Sep 20, 2026
5	American Hydro	Indirect evidence	York, PA, United StatesHQ checked Sep 20, 2026	51-200	77 contacts →
	Indirect evidence “Engineering Our focus is to create designs that maximize turbine capacity and efficiency while eliminating cavitation to meet our customers’ needs.” Source: RevenueBase Database · checked Sep 20, 2026
6	Electric Power Systems, INC	Partial evidence	Anchorage, AK, United StatesHQ checked Sep 20, 2026	51-200	63 contacts →
	Partial evidence “Incorporated in 1996, Electric Power Systems, Inc.(EPS) is a unique company offering a wide range of system planning, analysis, design, protection, and controls experience in the…” Source: RevenueBase Database · checked Sep 20, 2026
7	AH Engineering Consultants	Indirect evidence	Newport News, VA, United StatesHQ checked Sep 20, 2026	11-50	55 contacts →
	Indirect evidence “Few companies can offer the vast range of technical expertise in guiding engineering decisions that AH brings to each and every project our clients entrust us with.” Source: RevenueBase Database · checked Sep 20, 2026
8	FA Engineering	Indirect evidence	Pocatello, ID, United StatesHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “FA Engineering provides personalized quality technical solutions.” Source: RevenueBase Database · checked Sep 20, 2026
9	Gomez And Sullivan Engineers, D.P.C	Indirect evidence	Utica, NY, United StatesHQ checked Sep 20, 2026	11-50	50 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
10	IEC Corporation	Indirect evidence	Sacramento, CA, United StatesHQ checked Sep 20, 2026	11-50	46 contacts →
	Indirect evidence “IEC Corporation is a multi-discipline engineering, design, and consulting firm dedicated to Shaping the Future of Energy™.” Source: RevenueBase Database · checked Sep 20, 2026
11	Enernex	Indirect evidence	Knoxville, TN, United StatesHQ checked Sep 20, 2026	11-50	38 contacts →
	Indirect evidence “EnerNex, a CESI company, is an international champion delivering leading-edge engineering and consulting services to shape a better energy future.” Source: RevenueBase Database · checked Sep 20, 2026
12	PLM	Partial evidence	Marlborough, MA, United StatesHQ checked Sep 20, 2026	11-50	38 contacts →
	Partial evidence “PLM is a highly specialized electric power engineering consulting and design firm.” Source: RevenueBase Database · checked Sep 20, 2026
13	Natel Energy	Indirect evidence	Alameda, CA, United StatesHQ checked Sep 20, 2026	11-50	35 contacts →
	Indirect evidence “Natel Energy unlocks stranded hydro resources with patented FishSafe™ turbine designs that fit directly into existing civil works across Francis, Kaplan, and propeller…” Source: RevenueBase Database · checked Sep 20, 2026
14	Gers USA	Indirect evidence	Weston, FL, United StatesHQ checked Sep 20, 2026	51-200	31 contacts →
	Indirect evidence “GERS is a group with more than 44 years of experience specializing in Consulting Services in Electrical Engineering and associated areas.” Source: RevenueBase Database · checked Sep 20, 2026
15	P. Joseph Lehman, Inc., Consulting Engineers	Indirect evidence	Duncansville, PA, United StatesHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “P.” Source: RevenueBase Database · checked Sep 20, 2026
16	Emrgy INC	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	11-50	30 contacts →
	Partial evidence “Emrgy designs and deploys modular, scalable hydroelectric solutions without the need for construction or dams.” Source: RevenueBase Database · checked Sep 20, 2026
17	Krishnan & Associates, INC	Partial evidence	Stamford, CT, United StatesHQ checked Sep 20, 2026	11-50	26 contacts →
	Partial evidence “Krishnan & Associates (K&A) is a full service power and energy industry consulting firm providing specialized marketing, market analytics, mergers & acquisitions and recruitment…” Source: RevenueBase Database · checked Sep 20, 2026
18	Robertson-Bryan, INC	Partial evidence	Rancho Cordova, CA, United StatesHQ checked Sep 20, 2026	11-50	24 contacts →
	Partial evidence “Robertson-Bryan, Inc.(RBI) is a multi-disciplinary consulting firm of scientists and engineers with expertise in water and power resource planning, wastewater regulations and…” Source: RevenueBase Database · checked Sep 20, 2026
19	Current Hydro	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “Current Hydro is a hydropower developer, owner, and operator focused on unlocking clean energy from America’s existing infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
20	K&m Advisors	Indirect evidence	Bethesda, MD, United StatesHQ checked Sep 20, 2026	11-50	19 contacts →
	Indirect evidence “K&M is an international transaction and engineering advisory firm.” Source: RevenueBase Database · checked Sep 20, 2026
21	CLC Engineering, LLC	Indirect evidence	Alexandria, LA, United StatesHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
22	Utility System Efficiencies, INC	Partial evidence	Carmichael, CA, United StatesHQ checked Sep 20, 2026	11-50	17 contacts →
	Partial evidence “Since 1992 Utility System Efficiencies, Inc.(USE) has been serving a variety of power industry clients and enhancing their internal transmission and system analytical capabilities.” Source: RevenueBase Database · checked Sep 20, 2026
23	Watershed Science & Engineering	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “At WSE, our focus is on service.” Source: RevenueBase Database · checked Sep 20, 2026
24	Southeastern Consulting Engineers, INC	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	1-10	15 contacts →
	Indirect evidence “Southeastern offers a complete range of electrical engineering and consulting services to our clients.” Source: RevenueBase Database · checked Sep 20, 2026
25	Mckain Power Systems Consulting, LLC	Partial evidence	Katy, TX, United StatesHQ checked Sep 20, 2026	11-50	15 contacts →
	Partial evidence “At McKain Power Systems, our mission is simple – to be regarded as THE PLACE to go for your Power Systems needs.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: hydroelectric power consultants. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names hydroelectric power consultants.
Partial evidence: Its own public description names part of hydroelectric power consultants, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydroelectric power consultants. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 150 hydroelectric power consultants based in the United States

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Hydroelectric power consultants based in the United States at a glance

As of Sep 20, 2026

42.0%Verified-email coverage

100.4Average contacts per company

1-10Median size (employees)

2.7%Largest-city concentration · Denver

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 150 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among hydroelectric power consultants, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “hydroelectric power consultants”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names hydroelectric power consultants), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among hydroelectric power consultants, 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 its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 6,324 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 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names hydroelectric power consultants, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many hydroelectric power consultants are there based in the United States?

RevenueBase identified 150 hydroelectric power consultants 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 hydroelectric power consultants?

Denver leads with 4 headquartered companies, followed by Houston (4) and Austin (3).

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 6,324 verified decision-maker contacts tracked across these 150 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 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.