Field Service Supervisor

Field Service SupervisorNorth 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.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.ResponsibilitiesLead 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.QualificationsRequired:High school diploma or equivalent5+ years of experience in transformer services, high voltage testing, substation work, or related technical field operationsDemonstrated ability to lead multi-crew field teams and support complex projectsStrong written and verbal communication skills; ability to coordinate with customers and internal teamsProficiency with MS Office and digital reporting systemsValid driver's license and insurable driving recordAbility to lift/carry up to 50 lbs. and work safely in outdoor, high voltage environmentsWillingness to travel frequently, including overnight staysAbility to work flexible schedules including overtime, weekends, holidays, and nightsSuccessful completion of background checks and post-offer, job-related medical evaluation/drug testing where permittedPreferred: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, CCVTsExperience planning testing scopes, interpreting results, and supporting field engineering decisionsFamiliarity with crane/rigging, oil-processing support, and advanced transformer service proceduresWork Environment & Physical Requirements:Field-based work in outdoor substations and industrial sitesRegular domestic travel with occasional international travelPPE required; reasonable accommodations may be madeEEO StatementNASS, 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.