Senior Field Service Technician – HV Transformers & Substations

NASS; United States; On-site; USD 44,000 - 63,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

401(k) savings plan with company match

Health Savings Account (HSA) and/or FS

Life and AD&D insurance

Short-term and long-term disability

Employee Assistance Program (EAP)

Per diem for travel

Referral bonuses

Tuition reimbursement

Job summary

NASS is seeking a Field Service Technician III to perform advanced transformer services, maintenance, testing, diagnostics, and repair on high‑voltage equipment. This senior role leads junior technicians and supports complex projects on site nationwide.

You will travel frequently (about 75%), work outdoors in energized environments, and follow safety policies while documenting inspections and test results. A strong background in transformer components and field practices is required, with

Qualifications

• Five or more years of transformer services, substation apparatus work, or related high voltage field experience.
• High school diploma or GED required.
• Valid driver’s license and insurable record.

Responsibilities

• 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 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

Skills

Transformers

High voltage equipment

Troubleshooting

Education

High school diploma or GED

Tools

Oil processing equipment

Calisto sensors

Job description

NASS is seeking a Field Service Technician III to perform advanced transformer services, maintenance, testing, diagnostics, and repair on high‑voltage equipment. This senior role leads junior technicians and supports complex projects on site nationwide.

You will travel frequently (about 75%), work outdoors in energized environments, and follow safety policies while documenting inspections and test results. A strong background in transformer components and field practices is required, with