Company lists · Data refreshed September 2026
Top 25 Grid reliability consulting firms based in the United States
RevenueBase identified 880 grid reliability consulting firms headquartered in the United States as of September 2026 and tracks 27,940 professional contacts across them, including 12,293 with verified work emails and 10,953 with mobile numbers. Houston is the largest hub.
This list covers grid reliability 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.
The 25 largest grid reliability consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,987 | ||||
“ENTRUST Solutions Group, an ENR Top 100 company, provides comprehensive and dependable engineering, consulting, and automation services to pipeline companies, gas and electric…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 1,840 | ||||
“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, 2026Thanks. The Data Team will review it. | |||||
| 3 | Westwood Professional ServicesIndirect evidence | 1,631 | |||
“At Westwood, our purpose is to create a better world for people through our work.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | WilldanPartial evidence | 838 | |||
“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 619 | ||||
“Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 544 | ||||
“Delta Star is recognized as an industry leader in pursuit of continuously improving the performance, delivery and reliability of power to meet the energy needs of the future._…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 524 | ||||
“RESA Power is your ONE-STOP for all of your power needs.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 499 | ||||
“Qualitrol is a global leader in electrical grid monitoring solutions for businesses that manage, operate, or support the power grid.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | Techserv EngineeringPartial evidence | 445 | |||
“TechServ Consulting and Training, Ltd was established in November 1992.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | Open Systems InternationalIndirect evidence | 444 | |||
Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 372 | ||||
“For decades, E Source has been a trusted partner to utilities navigating an evolving energy landscape.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 301 | ||||
“We provide expert engineering and consulting services that enable a more reliable and resilient power system.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | Quanta Technology, LLCIndirect evidence | 281 | |||
“Quanta Technology is an expertise-based, independent advisory company providing business and technical expertise to the energy and utility industries.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 277 | ||||
“Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 250 | ||||
“Mosaic is a consulting firm that delivers custom solutions across the energy, utility, grid operations, and grid modernization space.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | QUESIndirect evidence | 220 | |||
“QUES provides electric distribution, transmission and substation engineering, utility asset management, electric power project management and other ancillary utility…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 192 | ||||
“Newkirk Electric is a family-owned and operated, Michigan-based company headquartered on the shorelines of West Michigan.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | United Engineers & Constructors An Aecon CompanyPartial evidence | 188 | |||
“United Engineers & Constructors is an industry-leading infrastructure engineering, procurement, construction, and consulting company dedicated to improving lives by delivering the…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 185 | ||||
“Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | UtilicastPartial evidence | 179 | |||
“Utilicast is more than just a consulting company.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 160 | ||||
“Qualus is a leading pure-play power services firm and innovator at the forefront of the energy transition and transformation, with differentiated capabilities across grid…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | VoltyxIndirect evidence | 133 | |||
“Voltyx is an integrated solutions provider focused on guiding our partners through the complex modernization of the electrical infrastructure through vision, strategy, service…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | Mastec Power DeliveryIndirect evidence | 110 | |||
“As one of the nation's leading electric transmission line construction companies, MasTec Power Delivery companies engineer and construct efficient and reliable electrical…” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | Lindsey SystemsIndirect evidence | 60 | |||
“Lindsey Systems is recognized globally as an innovator in the electric power industry.” Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | Tier 1 Utility Design, INCIndirect evidence | 58 | |||
Source: company website · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 880 grid reliability consulting firms based in the United States
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Grid reliability consulting firms based in the United States at a glance
As of Sep 3, 2026Companies by employee count
Verified emails by last verification
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 grid reliability 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 “grid reliability 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 grid reliability 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, 12,293 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.
Grid reliability consulting firms by metro
- Grid reliability consulting firms in Houston29
Frequently asked
How many grid reliability consulting firms are there based in the United States?
RevenueBase identified 880 grid reliability 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?
Entrust Solutions Group, headquartered in Wilmington, tops this list with the largest team on record.
Which city has the most grid reliability consulting firms?
Houston leads with 29 headquartered companies, followed by Atlanta (16) and Austin (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 12,293 verified decision-maker contacts tracked across these 880 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.
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