Company lists · Data refreshed November 2026
Top 25 Substation testing companies based in the United States
RevenueBase identified 359 company matches for substation testing companies associated with the United States as of November 2026 and tracks 10,730 professional contacts across them, including 4,190 with verified work emails. Houston is the largest hub.
This list covers company matches for substation testing companies 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 November 6, 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 substation testing companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,324 contacts → | ||||
Exact match “Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 678 contacts → | ||||
Exact match “Electric Power Systems is an independent electrical testing & engineering organization.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 662 contacts → | ||||
Exact match “Doble is the world’s most trusted brand in electrical diagnostics.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 650 contacts → | ||||
Exact match “PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 390 contacts → | ||||
Exact match “New River Electrical Corporation (NRE) is one of the nation's leading employee-owned providers of electrical infrastructure construction and maintenance services, helping…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 305 contacts → | ||||
Exact match “Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 299 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 270 contacts → | ||||
Exact match “In business since 1971, Electrical Reliability Services, Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 219 contacts → | ||||
Exact match “SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 205 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 181 contacts → | ||||
Exact match “We are an innovative supplier of infrastructure inspection, engineering, and field repair and reinforcement services for the global electrical utility, renewables, lighting, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 176 contacts → | ||||
Exact match “Rubicon Technical Services (RTS) offers innovative solutions for commissioning, testing, optimizing, operating, and maintaining critical facilities that depend on electrical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 150 contacts → | ||||
Exact match “Hood Patterson & Dewar (HP & D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering: • Electrical and mechanical…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 143 contacts → | ||||
Exact match “Substation Engineering Company (SECo), is a full service engineering and design firm with a dedicated team of experienced personnel providing a full range of cost effective…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 116 contacts → | ||||
Exact match “JINGOLI POWER assists clients with their complex electrical transmission, distribution and substation projects and programs.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 107 contacts → | ||||
Exact match “North American Substation Services is an electrical/electronic manufacturing company based out of 445 Douglas Ave, Altamonte Springs, Florida, United States.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 106 contacts → | ||||
Exact match “For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 95 contacts → | ||||
Exact match “Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 93 contacts → | ||||
Exact match “At Apollo, we help our clients commission mission-critical assets that power tomorrow’s economy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 88 contacts → | ||||
Exact match “Ward Electric Company is a full-service electrical contractor which has been a leading electrical service provider to utilities, industrial, commercial, and residential entities…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 85 contacts → | ||||
Exact match “J.F.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 75 contacts → | ||||
Exact match “Utili-Serve offers services to power companies (both large + small), municipalities and other energy providers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 74 contacts → | ||||
Exact match “Vision: To be the Global Power Protection Expert Mission: Deliver exceptional testing, maintenance, engineering, and commissioning services with uncompromising quality, safety…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 71 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 66 contacts → | ||||
Exact match “Zadok Technologies – Providing Engineering And Field Services To The World Quality Companies provides engineering and field services to the world.” Recorded in the RevenueBase company graph · Nov 6, 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 “substation testing companies”. 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 359 substation testing companies based in the United States
See the full list, filter by size, metro and specialty, and access 4,190 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Substation testing companies based in the United States at a glance
As of Nov 6, 2026Companies by employee count
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 359 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 “substation testing companies” 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 4,190 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 November 6, 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.
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 “substation testing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many substation testing companies are there based in the United States?
RevenueBase identified 359 company matches for substation testing companies associated with the United States as of November 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?
Shermco Industries tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most substation testing companies?
Houston leads with 13 company records, followed by Atlanta (8) and Altamonte Springs (5).
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 4,190 professional contacts with verified work emails tracked across these 359 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 November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 359 substation testing companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Substation testing companies by geography
- Substation testing companies based in Sao Paulo, Brazil
- Substation testing companies based in Australia
- Substation testing companies based in Brazil
- Substation testing companies based in Canada
- Substation testing companies based in Chile
- Substation testing companies based in Colombia
- Substation testing companies based in France
- Substation testing companies based in Germany
- Substation testing companies based in India
- Substation testing companies based in Italy
- Substation testing companies based in Mexico
- Substation testing companies based in the Netherlands
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Substation testing companies based in Sao Paulo, Brazil
- Substation testing companies based in Australia
- Substation testing companies based in Brazil
- Substation testing companies based in Canada
- Substation testing companies based in Chile
- Substation testing companies based in Colombia
Company intelligence · public preview
Top 25 substation testing companies based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 359 matching company records for substation testing companies based in the United States, with 10,730 tracked contacts and 4,190 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 substation testing companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Shermco Industriesshermco.comHQ: Irving, OK, United StatesReported employees: 1,001-5,000 | Irving, OK, United States | 1,001-5,000 | Exact match | 1,324 contacts → |
“Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Electric Power Systemsvoltyx.comHQ: Maryland Heights, MI, United StatesReported employees: 501-1,000 | Maryland Heights, MI, United States | 501-1,000 | Exact match | 678 contacts → |
“Electric Power Systems is an independent electrical testing & engineering organization.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Doble Engineeringdoble.comHQ: Marlborough, MA, United StatesReported employees: 501-1,000 | Marlborough, MA, United States | 501-1,000 | Exact match | 662 contacts → |
“Doble is the world’s most trusted brand in electrical diagnostics.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  PAR Electrical Contractors, LLCparelectric.comHQ: Kansas City, MO, United StatesReported employees: 1,001-5,000 | Kansas City, MO, United States | 1,001-5,000 | Exact match | 650 contacts → |
“PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  NEW River Electrical Corporationnewriverelectrical.comHQ: Roanoke, MD, United StatesReported employees: 1,001-5,000 | Roanoke, MD, United States | 1,001-5,000 | Exact match | 390 contacts → |
“New River Electrical Corporation (NRE) is one of the nation's leading employee-owned providers of electrical infrastructure construction and maintenance services, helping…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Asplundh Engineering Servicesasplundhengineering.comHQ: Willow Grove, MA, United StatesReported employees: 1,001-5,000 | Willow Grove, MA, United States | 1,001-5,000 | Exact match | 305 contacts → |
“Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | HQ: Castle Rock, United StatesReported employees: 1,001-5,000 | Castle Rock, United States | 1,001-5,000 | Exact match | 299 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 |  Electrical Reliability Services, INCers.vertiv.comHQ: Westerville, SC, United StatesReported employees: 201-500 | Westerville, SC, United States | 201-500 | Exact match | 270 contacts → |
“In business since 1971, Electrical Reliability Services, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Sdmyerssdmyers.comHQ: Tallmadge, OH, United StatesReported employees: 201-500 | Tallmadge, OH, United States | 201-500 | Exact match | 219 contacts → |
“SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Aubrey Silvey Enterprises, INCsilvey.comHQ: Carrollton, GA, United StatesReported employees: 201-500 | Carrollton, GA, United States | 201-500 | Exact match | 205 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 |  EXOexoinc.comHQ: Magnolia, TX, United StatesReported employees: 51-200 | Magnolia, TX, United States | 51-200 | Exact match | 181 contacts → |
“We are an innovative supplier of infrastructure inspection, engineering, and field repair and reinforcement services for the global electrical utility, renewables, lighting, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Rubicon Technical Services - RTSrubicontechservices.comHQ: Kennesaw, NJ, United StatesReported employees: 51-200 | Kennesaw, NJ, United States | 51-200 | Exact match | 176 contacts → |
“Rubicon Technical Services (RTS) offers innovative solutions for commissioning, testing, optimizing, operating, and maintaining critical facilities that depend on electrical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Hood Patterson & Dewarhoodpd.comHQ: Norcross, GA, United StatesReported employees: 51-200 | Norcross, GA, United States | 51-200 | Exact match | 150 contacts → |
“Hood Patterson & Dewar (HP & D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering: • Electrical and mechanical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Substation Engineering Companysubengco.comHQ: Reading, DE, United StatesReported employees: 51-200 | Reading, DE, United States | 51-200 | Exact match | 143 contacts → |
“Substation Engineering Company (SECo), is a full service engineering and design firm with a dedicated team of experienced personnel providing a full range of cost effective…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Jingoli Power, LLCjingolipower.comHQ: Lawrence, NJ, United StatesReported employees: 51-200 | Lawrence, NJ, United States | 51-200 | Exact match | 116 contacts → |
“JINGOLI POWER assists clients with their complex electrical transmission, distribution and substation projects and programs.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | North American Substation Servicesnorthamericansubstationservices.com HQ: Altamonte Springs, FL, United StatesReported employees: 11-50 | Altamonte Springs, FL, United States | 11-50 | Exact match | 107 contacts → |
“North American Substation Services is an electrical/electronic manufacturing company based out of 445 Douglas Ave, Altamonte Springs, Florida, United States.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Technical Diagnostic Servicestdssolutions.comHQ: Fort Worth, TX, United StatesReported employees: 201-500 | Fort Worth, TX, United States | 201-500 | Exact match | 106 contacts → |
“For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Electrical Engineering & Service Co., INCeescousa.comHQ: Holbrook, MA, United StatesReported employees: Not recorded | Holbrook, MA, United States | Not recorded | Exact match | 95 contacts → |
“Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Apollo Mission Critical Engineeringapollomce.comHQ: Atlanta, GA, United StatesReported employees: 51-200 | Atlanta, GA, United States | 51-200 | Exact match | 93 contacts → |
“At Apollo, we help our clients commission mission-critical assets that power tomorrow’s economy.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Ward Electric Companywardelectriccompany.comHQ: Longmont, IA, United StatesReported employees: 501-1,000 | Longmont, IA, United States | 501-1,000 | Exact match | 88 contacts → |
“Ward Electric Company is a full-service electrical contractor which has been a leading electrical service provider to utilities, industrial, commercial, and residential entities…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  J.F. Electric, Incorporatedjfelectric.comHQ: Edwardsville, IL, United StatesReported employees: 501-1,000 | Edwardsville, IL, United States | 501-1,000 | Exact match | 85 contacts → |
“J.F.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Utili-Serveutili-serve.comHQ: Conover, NC, United StatesReported employees: 201-500 | Conover, NC, United States | 201-500 | Exact match | 75 contacts → |
“Utili-Serve offers services to power companies (both large + small), municipalities and other energy providers.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Praetorian Power Protection LLCpraetorianpower.comHQ: Seattle, OR, United StatesReported employees: 51-200 | Seattle, OR, United States | 51-200 | Exact match | 74 contacts → |
“Vision: To be the Global Power Protection Expert Mission: Deliver exceptional testing, maintenance, engineering, and commissioning services with uncompromising quality, safety…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Thompson Electric, INCthompsonelectric.comHQ: Munroe Falls, OH, United StatesReported employees: 201-500 | Munroe Falls, OH, United States | 201-500 | Exact match | 71 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 |  Zadok Technologies, LLCzadoktechnologies.comHQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 66 contacts → |
“Zadok Technologies – Providing Engineering And Field Services To The World Quality Companies provides engineering and field services to the world.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 359 company matches
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Substation testing companies: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
358 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 359 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for substation testing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many substation testing companies did RevenueBase find based in the United States?
The saved snapshot records 359 matching company records, 10,730 tracked contacts and 4,190 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Substation testing companies by geography
- Substation testing companies based in Sao Paulo, Brazil
- Substation testing companies based in Australia
- Substation testing companies based in Brazil
- Substation testing companies based in Canada
- Substation testing companies based in Chile
- Substation testing companies based in Colombia
- Substation testing companies based in France
- Substation testing companies based in Germany
- Substation testing companies based in India
- Substation testing companies based in Italy
- Substation testing companies based in Mexico
- Substation testing companies based in the Netherlands
Cite this list
RevenueBase Data Team. Top 25 substation testing companies based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/substation-testing-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Substation testing companies based in Sao Paulo, Brazil
- Substation testing companies based in Australia
- Substation testing companies based in Brazil
- Substation testing companies based in Canada
- Substation testing companies based in Chile
- Substation testing companies based in Colombia
Company intelligence · public preview
Top 25 substation testing companies based in the United States
RevenueBase records 359 matching company records for substation testing companies based in the United States, with 10,730 tracked contacts and 4,190 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: November 6, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 substation testing companies based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Shermco Industriesshermco.com HQ: Irving, OK, United StatesReported employees: 1,001-5,000 | Irving, OK, United States | 1,001-5,000 | Exact match | 1,324 contacts → |
“Shermco Industries is a provider of safe, reliable testing, repair, professional training, electrical outage planning, maintenance and analysis of rotating apparatus and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Electric Power Systemsvoltyx.com HQ: Maryland Heights, MI, United StatesReported employees: 501-1,000 | Maryland Heights, MI, United States | 501-1,000 | Exact match | 678 contacts → |
“Electric Power Systems is an independent electrical testing & engineering organization.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Doble Engineeringdoble.com HQ: Marlborough, MA, United StatesReported employees: 501-1,000 | Marlborough, MA, United States | 501-1,000 | Exact match | 662 contacts → |
“Doble is the world’s most trusted brand in electrical diagnostics.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | PAR Electrical Contractors, LLCparelectric.com HQ: Kansas City, MO, United StatesReported employees: 1,001-5,000 | Kansas City, MO, United States | 1,001-5,000 | Exact match | 650 contacts → |
“PAR, a Quanta Services company, offers a full range of construction services for substations, overhead and underground distribution and transmission lines, engineering, design…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | NEW River Electrical Corporationnewriverelectrical.com HQ: Roanoke, MD, United StatesReported employees: 1,001-5,000 | Roanoke, MD, United States | 1,001-5,000 | Exact match | 390 contacts → |
“New River Electrical Corporation (NRE) is one of the nation's leading employee-owned providers of electrical infrastructure construction and maintenance services, helping…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Asplundh Engineering Servicesasplundhengineering.com HQ: Willow Grove, MA, United StatesReported employees: 1,001-5,000 | Willow Grove, MA, United States | 1,001-5,000 | Exact match | 305 contacts → |
“Asplundh Engineering Services leverages more than 100 years of experience to provide a superior, single-point solution for engineering, design and testing services to…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | HQ: Castle Rock, United StatesReported employees: 1,001-5,000 | Castle Rock, United States | 1,001-5,000 | Exact match | 299 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 8 | Electrical Reliability Services, INCers.vertiv.com HQ: Westerville, SC, United StatesReported employees: 201-500 | Westerville, SC, United States | 201-500 | Exact match | 270 contacts → |
“In business since 1971, Electrical Reliability Services, Inc.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Sdmyerssdmyers.com HQ: Tallmadge, OH, United StatesReported employees: 201-500 | Tallmadge, OH, United States | 201-500 | Exact match | 219 contacts → |
“SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Aubrey Silvey Enterprises, INCsilvey.com HQ: Carrollton, GA, United StatesReported employees: 201-500 | Carrollton, GA, United States | 201-500 | Exact match | 205 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | EXOexoinc.com HQ: Magnolia, TX, United StatesReported employees: 51-200 | Magnolia, TX, United States | 51-200 | Exact match | 181 contacts → |
“We are an innovative supplier of infrastructure inspection, engineering, and field repair and reinforcement services for the global electrical utility, renewables, lighting, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Rubicon Technical Services - RTSrubicontechservices.com HQ: Kennesaw, NJ, United StatesReported employees: 51-200 | Kennesaw, NJ, United States | 51-200 | Exact match | 176 contacts → |
“Rubicon Technical Services (RTS) offers innovative solutions for commissioning, testing, optimizing, operating, and maintaining critical facilities that depend on electrical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Hood Patterson & Dewarhoodpd.com HQ: Norcross, GA, United StatesReported employees: 51-200 | Norcross, GA, United States | 51-200 | Exact match | 150 contacts → |
“Hood Patterson & Dewar (HP & D) is a customer-driven, employee-owned collaborative team of engineers, technicians, and service professionals, offering: • Electrical and mechanical…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Substation Engineering Companysubengco.com HQ: Reading, DE, United StatesReported employees: 51-200 | Reading, DE, United States | 51-200 | Exact match | 143 contacts → |
“Substation Engineering Company (SECo), is a full service engineering and design firm with a dedicated team of experienced personnel providing a full range of cost effective…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Jingoli Power, LLCjingolipower.com HQ: Lawrence, NJ, United StatesReported employees: 51-200 | Lawrence, NJ, United States | 51-200 | Exact match | 116 contacts → |
“JINGOLI POWER assists clients with their complex electrical transmission, distribution and substation projects and programs.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | North American Substation Servicesnorthamericansubstationservices.com HQ: Altamonte Springs, FL, United StatesReported employees: 11-50 | Altamonte Springs, FL, United States | 11-50 | Exact match | 107 contacts → |
“North American Substation Services is an electrical/electronic manufacturing company based out of 445 Douglas Ave, Altamonte Springs, Florida, United States.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Technical Diagnostic Servicestdssolutions.com HQ: Fort Worth, TX, United StatesReported employees: 201-500 | Fort Worth, TX, United States | 201-500 | Exact match | 106 contacts → |
“For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Electrical Engineering & Service Co., INCeescousa.com HQ: Holbrook, MA, United StatesReported employees: Not recorded | Holbrook, MA, United States | Not recorded | Exact match | 95 contacts → |
“Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Apollo Mission Critical Engineeringapollomce.com HQ: Atlanta, GA, United StatesReported employees: 51-200 | Atlanta, GA, United States | 51-200 | Exact match | 93 contacts → |
“At Apollo, we help our clients commission mission-critical assets that power tomorrow’s economy.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Ward Electric Companywardelectriccompany.com HQ: Longmont, IA, United StatesReported employees: 501-1,000 | Longmont, IA, United States | 501-1,000 | Exact match | 88 contacts → |
“Ward Electric Company is a full-service electrical contractor which has been a leading electrical service provider to utilities, industrial, commercial, and residential entities…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | J.F. Electric, Incorporatedjfelectric.com HQ: Edwardsville, IL, United StatesReported employees: 501-1,000 | Edwardsville, IL, United States | 501-1,000 | Exact match | 85 contacts → |
“J.F.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Utili-Serveutili-serve.com HQ: Conover, NC, United StatesReported employees: 201-500 | Conover, NC, United States | 201-500 | Exact match | 75 contacts → |
“Utili-Serve offers services to power companies (both large + small), municipalities and other energy providers.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Praetorian Power Protection LLCpraetorianpower.com HQ: Seattle, OR, United StatesReported employees: 51-200 | Seattle, OR, United States | 51-200 | Exact match | 74 contacts → |
“Vision: To be the Global Power Protection Expert Mission: Deliver exceptional testing, maintenance, engineering, and commissioning services with uncompromising quality, safety…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Thompson Electric, INCthompsonelectric.com HQ: Munroe Falls, OH, United StatesReported employees: 201-500 | Munroe Falls, OH, United States | 201-500 | Exact match | 71 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 25 | Zadok Technologies, LLCzadoktechnologies.com HQ: Houston, TX, United StatesReported employees: 51-200 | Houston, TX, United States | 51-200 | Exact match | 66 contacts → |
“Zadok Technologies – Providing Engineering And Field Services To The World Quality Companies provides engineering and field services to the world.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 359 company matches
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Substation testing companies: dataset insights
November 6, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
358 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 359 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: November 6, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for substation testing companies?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many substation testing companies did RevenueBase find based in the United States?
The saved snapshot records 359 matching company records, 10,730 tracked contacts and 4,190 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: November 6, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Substation testing companies by geography
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Cite this list
RevenueBase Data Team. Top 25 substation testing companies based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/substation-testing-companies/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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