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.

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
880Companies
27,940Contacts tracked
12,293Verified emails
10,953Mobile numbers
Unlock all 880 companies Free signup · no credit card · 500 free credits

The 25 largest grid reliability consulting firms based in the United States

Ranked by team size
Top 25 of 880 grid reliability 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 grid reliability 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
Entrust Solutions GroupPartial evidence
Lisle, DE, United StatesHQ checked Sep 3, 20261,001-5,0002,987

“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, 2026
2
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
3Plano, 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
4
WilldanPartial evidence
Anaheim, CA, United StatesHQ checked Sep 3, 20261,001-5,000838

“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, 2026
5
Electric Power EngineersStrong evidence
Austin, IL, United StatesHQ checked Sep 3, 2026501-1,000619

“Electric Power Engineers (EPE) is a global advisory and engineering firm advancing grid reliability, resilience, flexibility, and affordability.”

Source: company website · checked Sep 3, 2026
6
Delta Star, INCPartial evidence
Lynchburg, VA, United StatesHQ checked Sep 3, 20261,001-5,000544

“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, 2026
7
Resa PowerIndirect evidence
Houston, NY, United StatesHQ checked Sep 3, 20261,001-5,000524

“RESA Power is your ONE-STOP for all of your power needs.”

Source: company website · checked Sep 3, 2026
8
QualitrolPartial evidence
Fairport, NY, United StatesHQ checked Sep 3, 2026501-1,000499

“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, 2026
9
Techserv EngineeringPartial evidence
Tyler, TX, United StatesHQ checked Sep 3, 2026501-1,000445

“TechServ Consulting and Training, Ltd was established in November 1992.”

Source: company website · checked Sep 3, 2026
10
Open Systems InternationalIndirect evidence
Bedford, MA, United StatesHQ checked Sep 3, 20261,001-5,000444
Source: company website · checked Sep 3, 2026
11
E SourceIndirect evidence
Houston, NY, United StatesHQ checked Sep 3, 2026201-500372

“For decades, E Source has been a trusted partner to utilities navigating an evolving energy landscape.”

Source: company website · checked Sep 3, 2026
12Jackson, GA, United StatesHQ checked Sep 3, 2026201-500301

“We provide expert engineering and consulting services that enable a more reliable and resilient power system.”

Source: company website · checked Sep 3, 2026
13
Quanta Technology, LLCIndirect evidence
Raleigh, NC, United StatesHQ checked Sep 3, 2026201-500281

“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, 2026
14Willow Grove, DE, United StatesHQ checked Sep 3, 20261,001-5,000277

“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, 2026
15
MosaicStrong evidence
Renton, WA, United StatesHQ checked Sep 3, 2026201-500250

“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, 2026
16
QUESIndirect evidence
Kansas City, FL, United StatesHQ checked Sep 3, 2026501-1,000220

“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, 2026
17Muskegon, MI, United StatesHQ checked Sep 3, 2026501-1,000192

“Newkirk Electric is a family-owned and operated, Michigan-based company headquartered on the shorelines of West Michigan.”

Source: company website · checked Sep 3, 2026
18Mount Laurel, NJ, United StatesHQ checked Sep 3, 2026201-500188

“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, 2026
19
Expanse Electrical COIndirect evidence
Houston, TX, United StatesHQ checked Sep 3, 2026501-1,000185

“Expanse Electrical Company is a premier provider of integrated electrical infrastructure, instrumentation and automation system solutions.”

Source: company website · checked Sep 3, 2026
20
UtilicastPartial evidence
Seattle, WA, United StatesHQ checked Sep 3, 2026201-500179

“Utilicast is more than just a consulting company.”

Source: company website · checked Sep 3, 2026
21Lake Mary, FL, United StatesHQ checked Sep 3, 20261,001-5,000160

“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, 2026
22
VoltyxIndirect evidence
Maryland Heights, MO, United StatesHQ checked Sep 3, 2026201-500133

“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, 2026
23
Mastec Power DeliveryIndirect evidence
Coral Gables, FL, United StatesHQ checked Sep 3, 2026201-500110

“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, 2026
24
Lindsey SystemsIndirect evidence
Azusa, CA, United StatesHQ checked Sep 3, 2026201-50060

“Lindsey Systems is recognized globally as an innovator in the electric power industry.”

Source: company website · checked Sep 3, 2026
25
Tier 1 Utility Design, INCIndirect evidence
Reading, PA, United StatesHQ checked Sep 3, 2026201-50058
Source: company website · checked Sep 3, 2026

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, 2026
11-50Median size (employees)
HoustonLargest hub · 29 HQs
10,953Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
437
11-50
281
51-200
105
201-500
23
501-1,000
9
1,001-5,000
21
10001+
2

Verified emails by last verification

0–30
0
31–60
1,112
61–90
6,988
90–180
4,118
180+
75

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.