Company lists · Data refreshed September 2026
Top 25 Electrical testing and diagnostics based in the United States
RevenueBase identified 2,007 company matches for electrical testing and diagnostics associated with the United States as of September 2026 and tracks 14,921 professional contacts across them, including 4,175 with verified work emails. Houston is the largest hub.
This list covers company matches for electrical testing and diagnostics 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 19, 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 electrical testing and diagnostics based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,221 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 · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 653 contacts → | ||||
Exact match “Electric Power Systems is an independent electrical testing & engineering organization.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 619 contacts → | ||||
Exact match “Doble is the world’s most trusted brand in electrical diagnostics.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 4 | 308 contacts → | ||||
Exact match “Residential and Commercial Services Since 1994, the professional electricians at Mr.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 5 | 228 contacts → | ||||
Exact match “In business since 1971, Electrical Reliability Services, Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 196 contacts → | ||||
Exact match “Hilscher-Clarke Electric Company is a full service electrical contractor, with more than 100 years experience in the commercial, industrial, and residential markets.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 195 contacts → | ||||
Exact match “SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 167 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 158 contacts → | ||||
Exact match “Today's electrical infrastructure requires a level of quality control that only the best trained and most knowledgeable electrical contractors can master.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 152 contacts → | ||||
Exact match “KenMor Electric is recognized for its service and craftsmanship.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 138 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 · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 132 contacts → | ||||
Exact match “White Electrical is a full service industrial electrical contractor supplying many different industries including: automotive, food/beverage, power, chemical, pulp/paper…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 13 | 105 contacts → | ||||
Exact match “About Lemberg: Lemberg is a full-service electrical contracting firm for industrial, commercial and residential customers.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 102 contacts → | ||||
Exact match “DIT-MCO International's proven automated product testing solutions for wired assemblies provide reliable service to industrial, commercial, and military customers.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 98 contacts → | ||||
Exact match “Master Electric is a full service electrical contractor servicing the upper mid-west since 1973, providing commercial/industrial, multi-family, communication/data/fire/safety with…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 98 contacts → | ||||
Exact match “Welcome to United Electric Founded in 1976, United Electric has emerged as one of the leading electrical services companies in Sarasota and Manatee counties.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 94 contacts → | ||||
Exact match “With over 85 years of experience in the electrical contracting industry, Allan Briteway Electrical Utility Contractors, Inc.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 18 | 91 contacts → | ||||
Exact match “For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 91 contacts → | ||||
Exact match “Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 87 contacts → | ||||
Exact match “Our licensed electricians are prepared to solve all of your complex electrical issues.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 82 contacts → | ||||
Exact match “Delivering Outstanding products and services for electrical power systems We specialize in performing Arc Flash Analysis of your facility and training your team to deal with this…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 71 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 · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 70 contacts → | ||||
Exact match “Groves Electrical Services is a turnkey industrial and commercial electrical contractor taking projects from conception to completion nationwide.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 66 contacts → | ||||
Exact match “Rowan Electric was founded by brothers Paul and Mark Rowan, who have been proudly serving the greater San Diego area since 1998.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 58 contacts → | ||||
Exact match “Commercial & Industrial Electrical Contractor Capitol Valley Electric, Inc.” Recorded in the RevenueBase company graph · Sep 19, 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 “electrical testing and diagnostics”. 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 2,007 electrical testing and diagnostics based in the United States
See the full list, filter by size, metro and specialty, and access 4,175 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Electrical testing and diagnostics based in the United States at a glance
As of Sep 19, 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 2,007 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 “electrical testing and diagnostics” 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 4,175 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 19, 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 “electrical testing and diagnostics”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many electrical testing and diagnostics are there based in the United States?
RevenueBase identified 2,007 company matches for electrical testing and diagnostics 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?
Shermco Industries tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most electrical testing and diagnostics?
Houston leads with 35 company records, followed by New York (13) and Charlotte (12).
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 4,175 professional contacts with verified work emails tracked across these 2,007 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 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 2,007 electrical testing and diagnostics based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Electrical testing and diagnostics by geography
- Electrical testing and diagnostics based in Australia
- Electrical testing and diagnostics based in Belgium
- Electrical testing and diagnostics based in Brazil
- Electrical testing and diagnostics based in Canada
- Electrical testing and diagnostics based in France
- Electrical testing and diagnostics based in Germany
- Electrical testing and diagnostics based in India
- Electrical testing and diagnostics based in Italy
- Electrical testing and diagnostics based in the Netherlands
- Electrical testing and diagnostics based in New Zealand
- Electrical testing and diagnostics based in Norway
- Electrical testing and diagnostics based in Sweden
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
- Electrical testing and diagnostics based in Australia
- Electrical testing and diagnostics based in Belgium
- Electrical testing and diagnostics based in Brazil
- Electrical testing and diagnostics based in Canada
- Electrical testing and diagnostics based in France
- Electrical testing and diagnostics based in Germany
Company intelligence · public preview
Top 25 electrical testing and diagnostics 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 2,007 matching company records for electrical testing and diagnostics based in the United States, with 14,921 tracked contacts and 4,175 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: September 19, 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 electrical testing and diagnostics 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, TX, United StatesReported employees: 1,001-5,000 | Irving, TX, United States | 1,001-5,000 | Exact match | 1,221 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 · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Electric Power Systemsvoltyx.comHQ: Maryland Heights, MO, United StatesReported employees: 501-1,000 | Maryland Heights, MO, United States | 501-1,000 | Exact match | 653 contacts → |
“Electric Power Systems is an independent electrical testing & engineering organization.” Recorded description excerpt · September 19, 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 | 619 contacts → |
“Doble is the world’s most trusted brand in electrical diagnostics.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Mr. Electricmrelectric.com HQ: Waco, TX, United StatesReported employees: 1,001-5,000 | Waco, TX, United States | 1,001-5,000 | Exact match | 308 contacts → |
“Residential and Commercial Services Since 1994, the professional electricians at Mr.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Electrical Reliability Services, INCers.vertiv.comHQ: Westerville, OH, United StatesReported employees: 201-500 | Westerville, OH, United States | 201-500 | Exact match | 228 contacts → |
“In business since 1971, Electrical Reliability Services, Inc.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Hilscher-Clarke Electric Companyhilscher-clarke.com HQ: Canton, OH, United StatesReported employees: 201-500 | Canton, OH, United States | 201-500 | Exact match | 196 contacts → |
“Hilscher-Clarke Electric Company is a full service electrical contractor, with more than 100 years experience in the commercial, industrial, and residential markets.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Sdmyerssdmyers.comHQ: Tallmadge, OH, United StatesReported employees: 201-500 | Tallmadge, OH, United States | 201-500 | Exact match | 195 contacts → |
“SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Gurtz Electric COgurtzelectric.com HQ: Arlington Heights, IL, United StatesReported employees: 501-1,000 | Arlington Heights, IL, United States | 501-1,000 | Exact match | 167 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 9 |  Varcomac LLCvarcomac.comHQ: Odenton, MD, United StatesReported employees: 501-1,000 | Odenton, MD, United States | 501-1,000 | Exact match | 158 contacts → |
“Today's electrical infrastructure requires a level of quality control that only the best trained and most knowledgeable electrical contractors can master.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Kenmor Electric Companykenmor.comHQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 152 contacts → |
“KenMor Electric is recognized for its service and craftsmanship.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Hood Patterson & Dewarhoodpd.com HQ: Norcross, GA, United StatesReported employees: 51-200 | Norcross, GA, United States | 51-200 | Exact match | 138 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 · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  White Electrical Construction Companywhite-electrical.comHQ: Atlanta, GA, United StatesReported employees: 201-500 | Atlanta, GA, United States | 201-500 | Exact match | 132 contacts → |
“White Electrical is a full service industrial electrical contractor supplying many different industries including: automotive, food/beverage, power, chemical, pulp/paper…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Lemberglembergelectric.com HQ: Brookfield, WI, United StatesReported employees: 51-200 | Brookfield, WI, United States | 51-200 | Exact match | 105 contacts → |
“About Lemberg: Lemberg is a full-service electrical contracting firm for industrial, commercial and residential customers.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Dit-Mco Internationalditmco.com HQ: Kansas City, MO, United StatesReported employees: 51-200 | Kansas City, MO, United States | 51-200 | Exact match | 102 contacts → |
“DIT-MCO International's proven automated product testing solutions for wired assemblies provide reliable service to industrial, commercial, and military customers.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Master Electricmasterelectric.com HQ: Savage, MN, United StatesReported employees: 51-200 | Savage, MN, United States | 51-200 | Exact match | 98 contacts → |
“Master Electric is a full service electrical contractor servicing the upper mid-west since 1973, providing commercial/industrial, multi-family, communication/data/fire/safety with…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  United Electricunitedelectric.bizHQ: Bradenton, FL, United StatesReported employees: 11-50 | Bradenton, FL, United States | 11-50 | Exact match | 98 contacts → |
“Welcome to United Electric Founded in 1976, United Electric has emerged as one of the leading electrical services companies in Sarasota and Manatee counties.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Allan Briteway Electrical Utility Contractors, INCallanbritewayutility.comHQ: Florham Park, NJ, United StatesReported employees: 51-200 | Florham Park, NJ, United States | 51-200 | Exact match | 94 contacts → |
“With over 85 years of experience in the electrical contracting industry, Allan Briteway Electrical Utility Contractors, Inc.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Technical Diagnostic Servicestdssolutions.com HQ: Fort Worth, TX, United StatesReported employees: 201-500 | Fort Worth, TX, United States | 201-500 | Exact match | 91 contacts → |
“For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Electrical Engineering & Service Co., INCeescousa.comHQ: Holbrook, MA, United StatesReported employees: Not recorded | Holbrook, MA, United States | Not recorded | Exact match | 91 contacts → |
“Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Hi-Tech Electric Companyhi-techelectric.net HQ: Kalamazoo, MI, United StatesReported employees: 201-500 | Kalamazoo, MI, United States | 201-500 | Exact match | 87 contacts → |
“Our licensed electricians are prepared to solve all of your complex electrical issues.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Medina, MN, United StatesReported employees: 11-50 | Medina, MN, United States | 11-50 | Exact match | 82 contacts → |
“Delivering Outstanding products and services for electrical power systems We specialize in performing Arc Flash Analysis of your facility and training your team to deal with this…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Praetorian Power Protection LLCpraetorianpower.com HQ: Seattle, OR, United StatesReported employees: 51-200 | Seattle, OR, United States | 51-200 | Exact match | 71 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 · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Groves Electrical Serviceswegroves.com HQ: Madisonville, KY, United StatesReported employees: 501-1,000 | Madisonville, KY, United States | 501-1,000 | Exact match | 70 contacts → |
“Groves Electrical Services is a turnkey industrial and commercial electrical contractor taking projects from conception to completion nationwide.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Rowan Electricrowanelectric.comHQ: Carlsbad, CA, United StatesReported employees: 51-200 | Carlsbad, CA, United States | 51-200 | Exact match | 66 contacts → |
“Rowan Electric was founded by brothers Paul and Mark Rowan, who have been proudly serving the greater San Diego area since 1998.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Capitol Valley Electriccapitolvalleyelectric.com HQ: Sacramento, CA, United StatesReported employees: 51-200 | Sacramento, CA, United States | 51-200 | Exact match | 58 contacts → |
“Commercial & Industrial Electrical Contractor Capitol Valley Electric, Inc.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 2,007 company matches
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Electrical testing and diagnostics: dataset insights
September 19, 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
1,977 records in the displayed employee bands.
30 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 2,007 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: September 19, 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 electrical testing and diagnostics?
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 electrical testing and diagnostics did RevenueBase find based in the United States?
The saved snapshot records 2,007 matching company records, 14,921 tracked contacts and 4,175 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: September 19, 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
Electrical testing and diagnostics by geography
- Electrical testing and diagnostics based in Australia
- Electrical testing and diagnostics based in Belgium
- Electrical testing and diagnostics based in Brazil
- Electrical testing and diagnostics based in Canada
- Electrical testing and diagnostics based in France
- Electrical testing and diagnostics based in Germany
- Electrical testing and diagnostics based in India
- Electrical testing and diagnostics based in Italy
- Electrical testing and diagnostics based in the Netherlands
- Electrical testing and diagnostics based in New Zealand
- Electrical testing and diagnostics based in Norway
- Electrical testing and diagnostics based in Sweden
Cite this list
RevenueBase Data Team. Top 25 electrical testing and diagnostics based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/electrical-testing-and-diagnostics/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
- Electrical testing and diagnostics based in Australia
- Electrical testing and diagnostics based in Belgium
- Electrical testing and diagnostics based in Brazil
- Electrical testing and diagnostics based in Canada
- Electrical testing and diagnostics based in France
- Electrical testing and diagnostics based in Germany
Company intelligence · public preview
Top 25 electrical testing and diagnostics based in the United States
RevenueBase records 2,007 matching company records for electrical testing and diagnostics based in the United States, with 14,921 tracked contacts and 4,175 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: September 19, 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 electrical testing and diagnostics 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, TX, United StatesReported employees: 1,001-5,000 | Irving, TX, United States | 1,001-5,000 | Exact match | 1,221 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 · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Electric Power Systemsvoltyx.com HQ: Maryland Heights, MO, United StatesReported employees: 501-1,000 | Maryland Heights, MO, United States | 501-1,000 | Exact match | 653 contacts → |
“Electric Power Systems is an independent electrical testing & engineering organization.” Recorded description excerpt · September 19, 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 | 619 contacts → |
“Doble is the world’s most trusted brand in electrical diagnostics.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Mr. Electricmrelectric.com HQ: Waco, TX, United StatesReported employees: 1,001-5,000 | Waco, TX, United States | 1,001-5,000 | Exact match | 308 contacts → |
“Residential and Commercial Services Since 1994, the professional electricians at Mr.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Electrical Reliability Services, INCers.vertiv.com HQ: Westerville, OH, United StatesReported employees: 201-500 | Westerville, OH, United States | 201-500 | Exact match | 228 contacts → |
“In business since 1971, Electrical Reliability Services, Inc.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Hilscher-Clarke Electric Companyhilscher-clarke.com HQ: Canton, OH, United StatesReported employees: 201-500 | Canton, OH, United States | 201-500 | Exact match | 196 contacts → |
“Hilscher-Clarke Electric Company is a full service electrical contractor, with more than 100 years experience in the commercial, industrial, and residential markets.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Sdmyerssdmyers.com HQ: Tallmadge, OH, United StatesReported employees: 201-500 | Tallmadge, OH, United States | 201-500 | Exact match | 195 contacts → |
“SDMyers is the industry leader in transformer and substation maintenance and electric power system reliability.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Gurtz Electric COgurtzelectric.com HQ: Arlington Heights, IL, United StatesReported employees: 501-1,000 | Arlington Heights, IL, United States | 501-1,000 | Exact match | 167 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 9 | Varcomac LLCvarcomac.com HQ: Odenton, MD, United StatesReported employees: 501-1,000 | Odenton, MD, United States | 501-1,000 | Exact match | 158 contacts → |
“Today's electrical infrastructure requires a level of quality control that only the best trained and most knowledgeable electrical contractors can master.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Kenmor Electric Companykenmor.com HQ: Houston, TX, United StatesReported employees: 201-500 | Houston, TX, United States | 201-500 | Exact match | 152 contacts → |
“KenMor Electric is recognized for its service and craftsmanship.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Hood Patterson & Dewarhoodpd.com HQ: Norcross, GA, United StatesReported employees: 51-200 | Norcross, GA, United States | 51-200 | Exact match | 138 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 · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | White Electrical Construction Companywhite-electrical.com HQ: Atlanta, GA, United StatesReported employees: 201-500 | Atlanta, GA, United States | 201-500 | Exact match | 132 contacts → |
“White Electrical is a full service industrial electrical contractor supplying many different industries including: automotive, food/beverage, power, chemical, pulp/paper…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Lemberglembergelectric.com HQ: Brookfield, WI, United StatesReported employees: 51-200 | Brookfield, WI, United States | 51-200 | Exact match | 105 contacts → |
“About Lemberg: Lemberg is a full-service electrical contracting firm for industrial, commercial and residential customers.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Dit-Mco Internationalditmco.com HQ: Kansas City, MO, United StatesReported employees: 51-200 | Kansas City, MO, United States | 51-200 | Exact match | 102 contacts → |
“DIT-MCO International's proven automated product testing solutions for wired assemblies provide reliable service to industrial, commercial, and military customers.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Master Electricmasterelectric.com HQ: Savage, MN, United StatesReported employees: 51-200 | Savage, MN, United States | 51-200 | Exact match | 98 contacts → |
“Master Electric is a full service electrical contractor servicing the upper mid-west since 1973, providing commercial/industrial, multi-family, communication/data/fire/safety with…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | United Electricunitedelectric.biz HQ: Bradenton, FL, United StatesReported employees: 11-50 | Bradenton, FL, United States | 11-50 | Exact match | 98 contacts → |
“Welcome to United Electric Founded in 1976, United Electric has emerged as one of the leading electrical services companies in Sarasota and Manatee counties.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Allan Briteway Electrical Utility Contractors, INCallanbritewayutility.com HQ: Florham Park, NJ, United StatesReported employees: 51-200 | Florham Park, NJ, United States | 51-200 | Exact match | 94 contacts → |
“With over 85 years of experience in the electrical contracting industry, Allan Briteway Electrical Utility Contractors, Inc.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Technical Diagnostic Servicestdssolutions.com HQ: Fort Worth, TX, United StatesReported employees: 201-500 | Fort Worth, TX, United States | 201-500 | Exact match | 91 contacts → |
“For over 25 years, Sentinel-TDS, based in Dallas/Ft.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Electrical Engineering & Service Co., INCeescousa.com HQ: Holbrook, MA, United StatesReported employees: Not recorded | Holbrook, MA, United States | Not recorded | Exact match | 91 contacts → |
“Specialists in Electrical Power Systems - Testing, Commissioning, Maintenance.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Hi-Tech Electric Companyhi-techelectric.net HQ: Kalamazoo, MI, United StatesReported employees: 201-500 | Kalamazoo, MI, United States | 201-500 | Exact match | 87 contacts → |
“Our licensed electricians are prepared to solve all of your complex electrical issues.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | HQ: Medina, MN, United StatesReported employees: 11-50 | Medina, MN, United States | 11-50 | Exact match | 82 contacts → |
“Delivering Outstanding products and services for electrical power systems We specialize in performing Arc Flash Analysis of your facility and training your team to deal with this…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Praetorian Power Protection LLCpraetorianpower.com HQ: Seattle, OR, United StatesReported employees: 51-200 | Seattle, OR, United States | 51-200 | Exact match | 71 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 · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Groves Electrical Serviceswegroves.com HQ: Madisonville, KY, United StatesReported employees: 501-1,000 | Madisonville, KY, United States | 501-1,000 | Exact match | 70 contacts → |
“Groves Electrical Services is a turnkey industrial and commercial electrical contractor taking projects from conception to completion nationwide.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Rowan Electricrowanelectric.com HQ: Carlsbad, CA, United StatesReported employees: 51-200 | Carlsbad, CA, United States | 51-200 | Exact match | 66 contacts → |
“Rowan Electric was founded by brothers Paul and Mark Rowan, who have been proudly serving the greater San Diego area since 1998.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Capitol Valley Electriccapitolvalleyelectric.com HQ: Sacramento, CA, United StatesReported employees: 51-200 | Sacramento, CA, United States | 51-200 | Exact match | 58 contacts → |
“Commercial & Industrial Electrical Contractor Capitol Valley Electric, Inc.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 2,007 company matches
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Electrical testing and diagnostics: dataset insights
September 19, 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
1,977 records in the displayed employee bands.
30 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 2,007 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: September 19, 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 electrical testing and diagnostics?
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 electrical testing and diagnostics did RevenueBase find based in the United States?
The saved snapshot records 2,007 matching company records, 14,921 tracked contacts and 4,175 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: September 19, 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.
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Cite this list
RevenueBase Data Team. Top 25 electrical testing and diagnostics based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/electrical-testing-and-diagnostics/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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