Sentinel Electric, Inc

What Sentinel Electric, Inc does

Sentinel Electric, Inc. is a privately held American field-services company founded in 2001 and headquartered in Palmetto, Georgia (also referenced as Atlanta). The firm provides PRC-005- and NERC-compliant commissioning, acceptance testing, and maintenance services for electrical transmission substations, distribution systems, and generation facilities, with additional work for large industrial and commercial customers in the southeastern United States and on a nationwide basis. The company is currently celebrating its 25-year anniversary and operates with a very small team of roughly 1–10 employees.

Service delivery is built around three integrated offerings: Electrical Substation Testing (acceptance testing and commissioning of protective relays, power circuit breakers, power transformers, current transformers, cables, and station batteries), Power Generator Station Testing (acceptance testing and commissioning of generation electrical equipment including generators, transformers, breakers, batteries and chargers, meters, and control panel wiring), and Project Management (a dedicated Commissioning Engineer model covering design drawing review, test plan development and execution, technical direction, and final in-service checks). Technical execution is anchored in specialized test instrumentation, notably Doble F6150 and Omicron 356 satellite-synchronized end-to-end system testing, plus cross-OEM protective relay expertise across Schweitzer, ABB, RFL, Beckwith, Multilin, GE, Siemens, and Basler platforms. Power line carrier systems (line traps, line tuners, transmitters, receivers) are an additional area of specialization.

Sentinel Electric runs a direct-sales, quote-based professional services model with no disclosed pricing or standardized contract terms. The go-to-market is sales-led, targeting major electric utility providers as the primary vertical and large industrial/commercial facilities as a secondary segment. Customer acquisition is driven primarily through the company's website (Get a Quote / Contact Us forms), direct engagement, and professional networks within the electrical utility sector. The company is privately held, founder/family owned, with no disclosed institutional investors, funding rounds, or M&A activity. Current hiring of electrical engineers, testing technicians, and control board wiremen in Georgia indicates active capacity expansion tied to project demand.

Name

Sentinel Electric, Inc

Legal name

Sentinel Electric, Inc.

Website

https://sentinelelectricinc.com

Company type

Private

Founded year

2001

Operating status

Operating

Headcount range

1–10 employees

Short description

Sentinel Electric, Inc. is a privately held Georgia-based field services firm providing PRC-005- and NERC-compliant commissioning, acceptance testing, and maintenance for electrical substations, power plants, and distribution grids, primarily serving electric utilities and large industrial customers across the southeastern US.

Ownership category

akta.pro rank

Product category

Electrical Testing and Commissioning Services

NAICS

Electric Power Transmission, Control, and Distribution (22112), Power and Communication Line and Related Structures Construction (237130)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Testing, Commissioning, Maintenance & Retrofit/Modernization (Substations/Switchgear) (EUADACAL)

akta.pro secondary industries

Commissioning, testing & energization services (HVT, relay testing, SAT) (EUADAKAE), Substation Systems & Integration (EPC, Engineering, Protection, Commissioning) (IMAGAAAC)

Keywords

• Electrical substation testing
• Power system commissioning
• Protective relay testing
• Transmission and distribution testing
• NERC compliance services

Headquarters

HQ city

Atlanta

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Electrical Testing Services: Professional services revenue from providing acceptance testing and commissioning services for electrical transmission substations, distribution systems, and generation facilities. Services include protective relay testing, power transformer testing, circuit breaker testing, and comprehensive project management for new installations, retrofits, repairs and maintenance.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

Sentinel Electric provides commissioning, acceptance testing, and maintenance services for electrical transmission substations, distribution systems, and generation facilities. Services cover protective relays, power transformers, circuit breakers, station batteries, cables, and control panel wiring, delivered under PRC-005 and NERC compliance requirements, alongside dedicated commissioning engineer project management from design review through final in-service checks.

Product overview

Sentinel Electric Inc. is a power system testing and commissioning services company offering three integrated service lines: Electrical Substation Testing (for transmission and distribution substations), Power Generator Station Testing (for generation facilities), and Project Management. All services operate under PRC-005 and NERC compliance requirements. The company provides end-to-end testing capabilities including protective relay testing, power transformer testing, circuit breaker testing, battery testing, cable testing, ground grid testing, and functional testing, supported by specialized testing equipment from Doble and Omicron.

Differentiator

Problem solved

Functional benefit

Products and services

• Electrical Substation Testing Acceptance testing and commissioning services for electrical substation equipment, including protective relays, power circuit breakers, power transformers, current transformers, cables, and station batteries. Includes project management for new and existing installations. Targeted at electric utility providers and large industrial/commercial facilities.
• Power Generator Station Testing Acceptance testing and commissioning of generation electrical equipment including protective relays, generators, power transformers, power circuit breakers, station batteries and chargers, meters, and control panel wiring. Includes project management for new and existing installations. Targeted at power generation operators and large industrial facilities.
• Project Management Dedicated commissioning engineer services to prepare, oversee, test, and install components and systems for protection and control projects. Includes design drawing review, test plan development and execution, technical direction to personnel, and final in-service checks. Targeted at electric utility and large industrial customers executing substation and generation projects.

Quantifiable outcome

• 25 years of continuous operation as an industry leader

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Scale indicators2 records

Recent moves4 records

Expansion highlights3 records

Broad incumbents

• Quanta Services: Quanta Services is one of the largest U.S. specialty contractors serving the electric power, oil & gas, and renewable industries. While far larger and broader than Sentinel, Quanta competes for many of the same T&D and substation commissioning contracts.
• OMICRON electronics: OMICRON is a global vendor of testing and diagnostics equipment (including the 356 series used by Sentinel) and also offers engineering services for protection system testing. It is comparable both as an equipment supplier to Sentinel and as a competitor in specialized testing services.
• Doble Engineering Company: Doble is a leading provider of diagnostic instruments and testing services for the electric power industry. Sentinel uses Doble F6150 equipment and competes with Doble's services arm in the same NERC compliance testing market.

Direct peers

• Power Systems Testing Co. Power Systems Testing Co. is a niche electrical testing and commissioning services firm serving utilities and industrial customers, with overlapping capabilities in relay testing, substation commissioning, and power apparatus testing directly comparable to Sentinel's offerings.
• M.C. Dean: M.C. Dean is a large electrical and instrumentation specialty contractor offering system integration, testing, and commissioning for utility and mission-critical customers. It is comparable to Sentinel on substation and generation testing scope, though at significantly greater scale.
• Electrical Consultants Inc. (ECI): ECI is one of the largest U.S. providers of electrical power system commissioning, acceptance testing, and protection-and-control services for utilities. It directly competes with Sentinel on substation testing, relay commissioning, and generation facility testing.
• Shermco Industries: Shermco provides electrical testing, commissioning, and maintenance services for utility, industrial, and commercial clients. It competes with Sentinel on substation acceptance testing, relay testing, and power apparatus services.
• BHI Energy: BHI Energy provides specialized workforce solutions and technical services to the power generation, transmission, and distribution sectors, including commissioning and testing support. It is comparable to Sentinel in serving the same utility customer base with similar testing and commissioning capabilities.
• RES (Reliability Engineering Services): RES provides electrical commissioning, acceptance testing, and maintenance services for substations and generation facilities across the U.S., directly competing with Sentinel for the same utility testing and NERC compliance work.
• Electrical Reliability Services (ERS): ERS (a Vertiv company) provides electrical testing, acceptance testing, and maintenance services for data centers, utilities, and industrial facilities. It is comparable to Sentinel as a third-party testing provider for substation and power system equipment.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/sentinel-electric-inc

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sentinel Electric, Inc