Field Service Technician III

Field Service Technician III

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.

The Field Service Technician III serves as a senior field technician responsible for advanced assembly, maintenance, testing, diagnostics, and repair of transformers and high voltage apparatus. This role performs hands‑on transformer services with minimal supervision and supports complex projects through technical expertise, troubleshooting, and leadership of junior technicians.

• Model and reinforce safe work practices, PPE requirements, and company safety policies.
• Perform transformer testing and apparatus work as a lead technician on installation, maintenance, and emergency jobs.
• Install, test, and maintain electrical apparatus with strong understanding of transformer components and field practices.
• Troubleshoot and resolve issues identified during diagnostics and testing.
• Interpret and analyze test results accurately, supporting field decisions.
• Develop testing plans and assist with execution of field test procedures.
• Operate oil processing and vacuum rigs, including dry‑outs, circulation, and top‑off procedures.
• Complete documentation, inspections, job briefs, and work order entries.
• Maintain professional communication with supervisors, crew members, and customers.
• Install and assist with commissioning monitoring devices such as Calisto sensors.

Required:

• Five or more years of transformer services, substation apparatus work, or related high voltage field experience
• High school diploma or GED
• Valid driver’s license and insurable record
• Ability to stand, walk, climb, and lift up to 50 lbs.
• Ability to safely work in outdoor, energized, high voltage environments
• Willing and able to travel frequently (:75%), including overnight and occasional international travel
• Willingness to work overtime, nights, weekends, and holidays
• Ability to complete background checks and medical evaluations

Preferred:

• CDL or interest in obtaining one
• NCCCO crane certification
• Strong knowledge of mechanical and electrical maintenance tools
• Familiarity with grounding, LOTO, and arc‑flash boundaries
• Ability to read diagrams, one‑lines, schematics, and metering devices
• Desire to develop additional transformer diagnostics and testing skills

• Outdoor field role with exposure to weather, noise, and energized equipment
• Travel may include extended stays and international trips
• Reasonable accommodations may be provided

• 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)

• 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

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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