Medium Voltage Field Service Technician – Switchgear / Transformers / Protective Relays / Power Distribution

Liberty Personnel Services, Inc.; Illinois; Hybrid; USD 4,133,000 - 6,199,000; Full time

Job summary

Liberty Personnel Services, Inc. is seeking a Medium Voltage Field Service Technician for field installation, testing, commissioning, maintenance, and troubleshooting of MV electrical distribution equipment across utility, industrial, commercial, and mission-critical facilities.

The role requires 3+ years in MV electrical work, knowledge of switchgear, transformers, protective relays, UPS/ATS, and the ability to travel to customer sites. Strong safety and documentation skills are essential.

Qualifications

• High School Diploma or GED required.
• 3+ years of experience working with medium voltage electrical equipment.
• Experience commissioning, testing, troubleshooting, installing, and maintaining switchgear, transformers, circuit breakers, protective relays, substations, power distribution systems, UPS, ATS, and standby generators.

Responsibilities

• Perform field testing, commissioning, startup, troubleshooting, and maintenance of medium voltage equipment.
• Service and inspect switchgear, transformers, circuit breakers, protective relays, motor control equipment, and power distribution systems.
• Conduct preventative and corrective maintenance activities on electrical infrastructure.
• Perform acceptance testing, relay testing, insulation resistance testing, and power system diagnostics.
• Interpret electrical schematics, single-line diagrams, protection drawings, and equipment documentation.
• Support energization, outage planning, and startup activities.
• Coordinate with customers, project managers, engineers, and subcontractors to ensure project success.
• Prepare service reports, test documentation, and commissioning records.
• Maintain compliance with safety requirements (OSHA, NFPA).

Skills

Field service

MV experience

Electrical testing

Troubleshooting

Reading schematics

NFPA 70E safety

Travel willingness

Customer communication

Education

High School Diploma or GED

Tools

Relay testing equipment

UPS/ATS/Gensets diagnostics

Job description

Medium Voltage Field Service Technician – Switchgear / Transformers / Protective Relays / Power Distribution

Medium Voltage Field Service Technician – Switchgear / Transformers / Protective Relays / Power Distribution

Medium Voltage Field Service Technician – Switchgear / Transformers / Protective Relays / Power Distribution

URGENT NEED!

We are seeking a Medium Voltage Field Service Technician to support the installation, testing, commissioning, maintenance, and troubleshooting of medium voltage electrical distribution equipment. This position plays a key role in ensuring the reliability and performance of critical electrical infrastructure across utility, industrial, commercial, and mission‑critical facilities.

Key Responsibilities

• Perform field testing, commissioning, startup, troubleshooting, and maintenance of medium voltage electrical equipment.
• Service and inspect switchgear, transformers, circuit breakers, protective relays, motor control equipment, and power distribution systems.
• Conduct preventative and corrective maintenance activities on electrical infrastructure.
• Perform acceptance testing, relay testing, insulation resistance testing, and power system diagnostics.
• Interpret electrical schematics, single‑line diagrams, protection and control drawings, and equipment documentation.
• Support equipment energization, outage planning, and startup activities.
• Coordinate with customers, project managers, engineers, and subcontractors to ensure successful project execution.
• Prepare service reports, test documentation, and commissioning records.
• Maintain compliance with all company, client, OSHA, and NFPA safety requirements.

Qualifications

• High School Diploma or GED required.
• 3+ years of experience working with medium voltage electrical equipment.
• Experience commissioning, testing, troubleshooting, installing, and maintaining switchgear, transformers, circuit breakers, protective relays, substations, power distribution systems, UPS (Uninterruptible Power Supply) systems, ATS (Automatic Transfer Switches), and standby generators.
• Ability to read and interpret electrical drawings, schematics, and protection diagrams.
• Understanding of electrical safety practices including LOTO and NFPA 70E.
• Valid driver's licence and willingness to travel to customer sites.
• Ability to pass background and driving record checks.

Preferred Experience

• Medium voltage switchgear (5kV–35kV)
• Power transformers
• Circuit breakers and reclosers
• Electrical acceptance testing
• Relay commissioning and troubleshooting
• UPS (Uninterruptible Power Supply) systems
• Automatic Transfer Switches (ATS)
• Generator installation, commissioning, startup, maintenance, and troubleshooting
• Utility, industrial, renewable energy, data center, healthcare, mission‑critical, or critical infrastructure environments
• Strong troubleshooting and diagnostic capabilities.
• Experience supporting critical power infrastructure including UPS systems, ATS equipment, standby generators, switchgear, transformers, and protective relays.
• Excellent communication and customer service skills.
• Ability to work independently in field environments.
• Strong organizational and documentation skills.
• Commitment to safety, quality, and continuous learning.
• Ability to manage multiple projects and priorities simultaneously.

Patrick DelGaone

Keywords: Medium Voltage, MV Technician, Field Service Technician, Switchgear, Circuit Breakers, Transformers, Protective Relays, SEL Relays, Relay Testing, Commissioning, Electrical Testing, Acceptance Testing, Substations, Power Distribution, Utility Power Systems, Electrical Infrastructure, Industrial Power Systems, Electrical Maintenance, Field Service Engineer, UPS, Uninterruptible Power Supply, ATS, Automatic Transfer Switch, Generator Technician, Generator Commissioning, Generator Maintenance, Critical Power, Mission Critical, Data Centers, NETA, NFPA 70E, High Voltage, Electrical Power Systems, Grid Infrastructure, Renewable Energy, Critical Infrastructure, Power Generation, Transmission & Distribution, Electrical Construction, Energy.