Transformer Test Technician II

Overview

Overview 

North American Substation Services (NASS) is a national leader in transformer services and high‑voltage substation installation, maintenance, testing, and repair. With more than 20 years of experience, we deliver comprehensive, one‑stop solutions for utilities, industrial operations, and critical infrastructure across the United States. Our teams support the full lifecycle of substation and transformer assets, including installation, maintenance, major repairs, and diagnostic testing. 

Core services include transformer assembly, oil processing, regasket and life‑extension work, substation apparatus testing, and high‑voltage equipment maintenance to ensure safe, reliable system performance. We work on a wide range of substation equipment—power transformers, breakers, switches, arresters, and control cabinets—and perform essential diagnostics such as TTR, winding resistance, insulation resistance, power‑factor testing, and oil analysis through our dedicated in‑house laboratory. With a nationwide fleet of mobile oil‑processing units, we provide rapid on‑site support backed by strong technical expertise, a commitment to safety, and disciplined field execution to keep critical power systems operating reliably and efficiently. 

Benefits 

• Medical, dental, and vision coverage 
• 401(k) savings plan with company match 
• Health Savings Account (HSA) and/or Flexible Spending Account (FSA) 
• Life and AD&D insurance 
• Short-term and long-term disability coverage 
• Employee Assistance Program (EAP) 

Perks 

• Competitive pay 
• Talent development through instructor-led and online learning 
• Career path planning 
• Incentives for professional certifications 
• Per diem for travel 
• Referral bonuses 
• Tuition reimbursement 

Job Purpose:

This position performs routine skilled and technical support work in the inspection, repair and maintenance of transmission and distribution substation electrical equipment.

This position requires working outdoors in all weather conditions. Occasionally work is performed near moving mechanical parts, at heights, hazardous places and is occasionally exposed to wet and/or humid conditions, temperature extremes, fumes, traffic, potential electrical shock hazards, noise pollution, and vibration.

Responsibilities

Perform advanced electrical testing on power transformers, including:

• Doble Testing (Power Factor, Capacitance, Bushing Testing, Single Phase Excitation, TTR, Arrester Watts Loss)
• Transformer Turns Ratio (TTR) Testing
• Winding Resistance Measurement
• Insulation Resistance Testing using a Megger

Conduct functional testing and calibration of transformer gauges and accessories, such as:

• Winding Temperature Gauges
• Oil Temperature Gauges
• Liquid Level Gauges
• Pressure Relief Devices (PRD)
• Cooling Fan Operation
• Rapid Pressure Rise Relay Testing

Support reliability testing and maintenance during scheduled plant outages

Travel to generation plants outage work:

• Peak periods: Spring and Fall
• Off-peak periods: Summer and Winter (alternative assignments available)

• Ensure compliance with industry best practices, safety protocols, and maintain accurate documentation of test results

Qualifications

Required: 

• High School diploma or GED. Supplemental courses in electrical maintenance are highly desired for this position.
• Must possess a current and valid driver’s license, and have a good driving record for this position.
• Must be able to crawl, climb, stand, and lift up to 50 lbs. with or without reasonable accommodations in high voltage substations.
• Must be able to pass a fit for duty exam for this position.
• Must be available for regular overnight domestic travel and occasional international travel related to high voltage substation work.
• Must be willing to work flexible hours, overtime, and occasional weekends, holidays, and nights for this position.
• Able and willing to travel up to 75% as needed for high voltage substation work.

Preferred:

• Commercial Driver's License (CDL)
• NCCO Crane Certification 
• Some knowledge of the fundamentals and principles of electricity preferred.
• Knowledge of the hazards and safety precautions required in working in a power distribution facility preferred.
• Ability to learn to read and interpret electrical diagrams and prints.
• Ability to learn to read and interpret a variety of power generation and distribution metering and recording devices.
• Ability to learn the practices and procedures of the industry.
• Ability to follow oral and written directions.

EEO Statement 

NASS, an Asplundh Power Company, is an Equal Opportunity Employer. All qualified applicants will receive consideration without regard to race, color, religion, sex (including pregnancy, gender identity, and sexual orientation), national origin, age, disability, veteran status, or any other protected characteristic. NASS does not engage with individual recruiters or third party staffing agencies. Unsolicited résumés will not be accepted. 

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