Company lists · Data refreshed September 2026

Top 25 Energy systems integration firms based in the United States

Name: Energy systems integration firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 4,517 companies tracked

RevenueBase identified 4,517 company matches for energy systems integration firms associated with the United States as of September 2026 and tracks 105,767 professional contacts across them, including 45,321 with verified work emails. Houston is the largest hub.

This list covers company matches for energy systems integration 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 September 28, 2026.

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

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built

4,517Companies

105,767Contacts tracked

45,321Verified emails

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The 25 largest energy systems integration firms based in the United States

Ranked by team size

Top 25 of 4,517 company matches for energy systems integration firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Sargent & Lundy	Exact match	Chicago, WY, United StatesHQ recorded Sep 28, 2026	1,001-5,000	4,156 contacts →
	Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	M.C. Dean, INC	Exact match	Tysons, VA, United StatesHQ recorded Sep 28, 2026	5,001-10,000	2,761 contacts →
	Exact match “M.C.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	FTI	Exact match	Menasha, WI, United StatesHQ recorded Sep 28, 2026	1,001-5,000	2,741 contacts →
	Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Enercon Services, INC	Exact match	Kennesaw, GA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,865 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Fluence	Exact match	Arlington, VA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,863 contacts →
	Exact match “To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Mitsubishi Power Americas	Exact match	Lake Mary, FL, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,859 contacts →
	Exact match “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Ameresco	Exact match	Framingham, MA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,383 contacts →
	Exact match “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Solv Energy	Exact match	San Diego, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,286 contacts →
	Exact match “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Prime Controls	Exact match	Lewisville, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	857 contacts →
	Exact match “Prime Controls was established as a Main Automation Contractor to provide customers a sole source solution for Industrial Automation services and products.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Willdan	Exact match	Anaheim, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	851 contacts →
	Exact match “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	PAE	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	201-500	744 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Powersecure, INC	Exact match	Durham, NC, United StatesHQ recorded Sep 28, 2026	501-1,000	740 contacts →
	Exact match “PowerSecure, a Southern Company subsidiary, is a leading provider of innovative energy solutions to electric utilities and their industrial, institutional, and commercial…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Resource Innovations	Exact match	Half Moon Bay, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	733 contacts →
	Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Baker Electric	Exact match	Escondido, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	680 contacts →
	Exact match “Baker Electric is a full-service electrical contractor and energy infrastructure expert headquartered in Escondido, California.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Electric Power Engineers	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	630 contacts →
	Exact match “Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Cummings Electrical	Exact match	Fort Worth, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	626 contacts →
	Exact match “Cummings Electrical,(Cummings) is one of the largest providers of electrical contracting services in DFW market.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	E Tech Group	Exact match	West Chester, OH, United StatesHQ recorded Sep 28, 2026	501-1,000	610 contacts →
	Exact match “E Tech Group is one of the largest engineering and system integration firms in the United States.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Alterman, INC	Exact match	Live Oak, TX, United StatesHQ recorded Sep 28, 2026	501-1,000	597 contacts →
	Exact match “Since 1923, Alterman has provided electrical construction on many of San Antonio and Austin's most impressive landmarks and contemporary structures.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Vanderweil Engineers	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	201-500	545 contacts →
	Exact match “Vanderweil is a mechanical, electrical, plumbing, fire protection, technology, sustainability, commissioning, and power engineering firm dedicated to providing customized and…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Hunt Electric	Exact match	Eagan, MN, United StatesHQ recorded Sep 28, 2026	1,001-5,000	524 contacts →
	Exact match “Hunt Electric is a national electrical design, build, and maintenance firm based in Eagan, MN.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Saber Power	Exact match	Houston, TX, United StatesHQ recorded Sep 28, 2026	1,001-5,000	521 contacts →
	Exact match “Saber Power Services, a portfolio company of Greenbelt Capital Partners, is a fully integrated electrical power system services firm providing end-to-end solutions across utility…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	EC Electric	Exact match	Portland, OR, United StatesHQ recorded Sep 28, 2026	1,001-5,000	490 contacts →
	Exact match “Our lives function on a power grid.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Noresco	Exact match	Westborough, MA, United StatesHQ recorded Sep 28, 2026	201-500	481 contacts →
	Exact match “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Thermo Systems	Exact match	East Windsor, NJ, United StatesHQ recorded Sep 28, 2026	201-500	455 contacts →
	Exact match “Thermo Systems is a full-service control systems integration partner, providing world-class automation solutions within the Energy, Life Sciences, and Mission Critical markets.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Pe-Services	Exact match	Lebanon, OH, United StatesHQ recorded Sep 28, 2026	n/a	455 contacts →
	Exact match “PE-Services provides engineering for your success.” Recorded in the RevenueBase company graph · Sep 28, 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 “energy systems integration 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 4,517 energy systems integration firms based in the United States

See the full list, filter by size, metro and specialty, and access 45,321 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy systems integration firms based in the United States at a glance

As of Sep 28, 2026

42.8%Verified-email coverage

23.4Average contacts per company

11-50Median size (employees)

2.4%Largest-city concentration · Houston

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,947

11-50

1,730

51-200

583

201-500

149

501-1,000

1,001-5,000

5,001-10,000

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 4,517 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 “energy systems integration 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 45,321 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 28, 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.

Energy systems integration 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 “energy systems integration firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy systems integration firms are there based in the United States?

RevenueBase identified 4,517 company matches for energy systems integration firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Sargent & Lundy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy systems integration firms?

Houston leads with 109 company records, followed by New York (99) and San Diego (63).

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 45,321 professional contacts with verified work emails tracked across these 4,517 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 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.