Field Service Supervisor
Voltyx, Des Moines, IA, United States
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
Pay
The hourly rate for this position is between
$40 - $65 per hour . Factors which may affect starting pay within this range may include geography/market, skills, education, experience, and other qualifications of the successful candidate.
Position Overview
The
Field Service Supervisor
provides senior technical leadership for complex transformer and high voltage apparatus projects, overseeing inspection, repair, maintenance, and testing of transmission and distribution substation equipment. The role directs multi-crew field execution, resolves technical issues, and ensures compliance with safety, quality, and operational standards.
Lead and oversee field crews performing advanced installation, inspection, maintenance, testing, and repair of transformers and high voltage substation equipment.
Promote a strong safety culture, adhering to company safety policies, PPE requirements, and conducting regular JBOs.
Plan and coordinate complex field activities, including resource planning, customer communication, and job-site readiness.
Provide expert technical guidance for advanced troubleshooting, diagnostics, and problem solving on transformer and apparatus work.
Perform or oversee all transformer testing required within project scope, ensuring accuracy and proper documentation.
Mentor technicians to strengthen technical capability and field leadership across multi-crew operations.
Maintain accurate records of service activities, equipment repairs, testing results, and customer interactions.
Collaborate with internal teams for equipment needs, materials, logistics, and scheduling future crew assignments.
Communicate scope changes and field deviations to support cost recovery and project documentation.
Qualifications
Required
High school diploma or equivalent
5+ years of experience in transformer services, high voltage testing, substation work, or related technical field operations
Demonstrated ability to lead multi-crew field teams and support complex projects
Strong written and verbal communication skills; ability to coordinate with customers and internal teams
Proficiency with MS Office and digital reporting systems
Valid driver’s license and insurable driving record
Ability to lift/carry up to 50 lbs. and work safely in outdoor, high voltage environments
Willingness to travel frequently, including overnight stays
Ability to work flexible schedules including overtime, weekends, holidays, and nights
Successful completion of background checks and post-offer, job-related medical evaluation/drug testing where permitted
Preferred
Advanced experience with transformer testing and diagnostics (e.g., Doble, DLRO, insulation resistance, winding resistance, CT ratio/saturation, power factor)
Knowledge of substation apparatus including HV/MV circuit breakers, transformers, switchgear, CTs, PTs, CCVTs
Experience planning testing scopes, interpreting results, and supporting field engineering decisions
Familiarity with crane/rigging, oil-processing support, and advanced transformer service procedures
Work Environment & Physical Requirements
Field-based work in outdoor substations and industrial sites
Regular domestic travel with occasional international travel
PPE required; reasonable accommodations may be made
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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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
Pay
The hourly rate for this position is between
$40 - $65 per hour . Factors which may affect starting pay within this range may include geography/market, skills, education, experience, and other qualifications of the successful candidate.
Position Overview
The
Field Service Supervisor
provides senior technical leadership for complex transformer and high voltage apparatus projects, overseeing inspection, repair, maintenance, and testing of transmission and distribution substation equipment. The role directs multi-crew field execution, resolves technical issues, and ensures compliance with safety, quality, and operational standards.
Lead and oversee field crews performing advanced installation, inspection, maintenance, testing, and repair of transformers and high voltage substation equipment.
Promote a strong safety culture, adhering to company safety policies, PPE requirements, and conducting regular JBOs.
Plan and coordinate complex field activities, including resource planning, customer communication, and job-site readiness.
Provide expert technical guidance for advanced troubleshooting, diagnostics, and problem solving on transformer and apparatus work.
Perform or oversee all transformer testing required within project scope, ensuring accuracy and proper documentation.
Mentor technicians to strengthen technical capability and field leadership across multi-crew operations.
Maintain accurate records of service activities, equipment repairs, testing results, and customer interactions.
Collaborate with internal teams for equipment needs, materials, logistics, and scheduling future crew assignments.
Communicate scope changes and field deviations to support cost recovery and project documentation.
Qualifications
Required
High school diploma or equivalent
5+ years of experience in transformer services, high voltage testing, substation work, or related technical field operations
Demonstrated ability to lead multi-crew field teams and support complex projects
Strong written and verbal communication skills; ability to coordinate with customers and internal teams
Proficiency with MS Office and digital reporting systems
Valid driver’s license and insurable driving record
Ability to lift/carry up to 50 lbs. and work safely in outdoor, high voltage environments
Willingness to travel frequently, including overnight stays
Ability to work flexible schedules including overtime, weekends, holidays, and nights
Successful completion of background checks and post-offer, job-related medical evaluation/drug testing where permitted
Preferred
Advanced experience with transformer testing and diagnostics (e.g., Doble, DLRO, insulation resistance, winding resistance, CT ratio/saturation, power factor)
Knowledge of substation apparatus including HV/MV circuit breakers, transformers, switchgear, CTs, PTs, CCVTs
Experience planning testing scopes, interpreting results, and supporting field engineering decisions
Familiarity with crane/rigging, oil-processing support, and advanced transformer service procedures
Work Environment & Physical Requirements
Field-based work in outdoor substations and industrial sites
Regular domestic travel with occasional international travel
PPE required; reasonable accommodations may be made
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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