Senior Field Service Technician EV Charging Tier III

Zero Impact Builders • Merced, CA

24d • $75,000 - $85,000 • Onsite

About The Position

ChargeTronix is hiring a Senior (Tier III) Field Service Technician to serve as the top technical field position on its service team. The role is the escalation point for complex DC fast-charger faults, commissions new sites, mentors Tier I and II technicians, and is accountable for uptime across a Southern California-based territory. The technician works independently with little supervision, makes on-site safety and repair decisions, serves as a primary customer contact, and provides structured failure information to engineering. The position reports to the Field Service Manager and has no direct reports, but acts as the technical lead for Tier I and II technicians in the territory.

The technician diagnoses and repairs DC fast chargers, including component-level repair where appropriate; interprets PLC, CAN, and OCPP logs; and provides remote assistance to junior technicians. The role commissions installations, verifies electrical and network readiness, conducts acceptance and vehicle-interoperability tests, and performs field upgrades and retrofit campaigns. It also owns territory reliability measures, conducts preventive maintenance, identifies repeat-fault patterns, manages spares and warranty returns, and produces service bulletins, work instructions, SOPs, and training material.

The role requires safe work on electrical equipment, including job hazard analysis, lockout/tagout, arc-flash assessment, PPE selection, and compliance with applicable electrical codes and manufacturer specifications. The technician completes same-day field reports, communicates risks and service needs proactively, and keeps tools, test equipment, vehicle, and PPE organized and inspection-ready.

This is a full-time, exempt position based in Southern California with travel of 75% or more, including regional vehicle trips and periodic out-of-state air travel. The standard schedule is Monday through Friday, with a paid on-call rotation and occasional weekend or after-hours work when a site is down. Technicians plan their routes and workdays. Compensation is $75,000 to $85,000 per year, depending on experience, credentials, and platform depth; per diem on travel days and an on-call differential are paid in addition to base salary.

Requirements

• At least 5 years of hands-on electrical or electromechanical field-service experience, including at least 3 years on EV charging equipment and at least 2 years on DC fast chargers rated 50 kW or above.
• Demonstrated component-level repair experience on DC fast-charger hardware, including power modules, control or communication boards, contactors, and cooling systems, as well as cable and connector replacement for CCS, NACS, or CHAdeMO.
• Experience with 480 V three-phase systems and high-voltage DC; ability to read one-line diagrams, wiring diagrams, and schematics.
• Track record of training or leading other technicians, or writing procedures used by others.
• One of the following credentials: California General Electrician Certification; a journeyman or master electrician license from another state; EVITP certification; or 5+ years of documented DCFC field service with component-level repair plus California Electrician Trainee registration obtained within 90 days of hire.
• Current NFPA 70E qualified-person training, or completion within 60 days of hire; training is company-provided.
• OSHA 10 certification; OSHA 30 is preferred.
• Current CPR/First Aid, including low-voltage rescue, or completion within 60 days of hire; training is company-provided.
• Valid driver's license with a clean driving record; ability to pass a background check and DOT-style medical clearance for a company vehicle.
• Working knowledge of NEC, particularly Article 625, NFPA 70E, and OSHA 29 CFR 1910 Subpart S.
• Proficiency with multimeters, clamp meters, insulation-resistance testers, and torque tools; ability to use an oscilloscope or data logger when needed.
• Ability to read charger logs and PLC/CAN communication traces and identify where a charging session failed.
• Networking basics for connected chargers, including Ethernet, cellular modems, Wi-Fi, RS-485, and backend connectivity troubleshooting.
• Comfort using ticketing and CRM tools such as Salesforce or Zendesk, Microsoft Office or Google Workspace, and writing clear field reports.
• Ability to work independently and make sound on-site decisions, while knowing when to seek assistance.
• Customer-first communication style and ability to remain calm with site hosts and drivers when stations are down.
• Reliability and ability to plan and perform work under heavy travel requirements.
• Ability to meet the physical demands of the role, including regularly standing, walking, bending, kneeling, stooping, crouching, climbing, and working from ladders or lifts; frequently lifting and moving 50 lb and occasionally more with assistance or equipment.
• Ability to work outdoors in all weather, in heat and cold, in noisy environments, in confined cabinet spaces, and around energized equipment up to 480 VAC and 1,000 VDC with appropriate PPE.
• Ability to drive a company vehicle for extended periods and fly periodically; close and color vision to read displays, wiring, and indicator lights.

Nice To Haves

• Hands-on service experience on two or more DCFC platforms, including ABB, Tritium, BTC Power, SK Signet, Kempower, Alpitronic, Autel, ChargePoint, Sinexcel, Tellus, Longhorn, Blink, or Tesla.
• Working knowledge of OCPP 1.6J or 2.0.1, ISO 15118, and DIN 70121, including how failed handshakes appear in logs.
• OEM manufacturer service certifications on any of the listed platforms.
• Experience commissioning solar, battery storage, UPS, or other power-electronics equipment.
• Aerial lift or forklift certification.
• Bilingual English/Spanish.
• OSHA 30 certification.

Responsibilities

• Diagnose and resolve Tier III DC fast-charger faults involving power electronics, control and communication boards, contactors, cooling systems, cable and connector assemblies, and vehicle interoperability.
• Perform component-level repairs when appropriate, including work on power modules, SECC/PD/MCU boards, power supplies, contactors, IGBTs, and sensors.
• Read and interpret PLC, CAN, and OCPP logs to identify root causes, and capture logs, photos, and meter readings for engineering and warranty.
• Provide remote phone and video support to junior technicians working on live sites.
• Commission new installations by verifying 480 V service, grounding and bonding, torque values, firmware, network and OCPP backend registration, and payment and authorization functions.
• Conduct acceptance charge tests across vehicle platforms and connector types, including CCS1, NACS, and CHAdeMO, and sign off that sites are ready for service.
• Maintain and update the test-vehicle fleet and conduct interoperability testing as vehicles and NACS adapters enter the market.
• Execute field upgrade and retrofit campaigns, including NACS cable and adapter retrofits, firmware rollouts, and engineering change orders.
• Own and report territory uptime, mean time to repair, and first-time-fix rate on a weekly basis.
• Perform scheduled preventive maintenance using the ChargeTronix PM checklist and recommend checklist changes.
• Identify repeat-fault patterns across sites, drive issues to root cause, and write field service bulletins and work instructions.
• Manage truck stock and territory spares; tag and return failed parts with complete failure data for RMA and warranty.
• Train and ride along with Tier I and II technicians and sign off their readiness to work independently.
• Write and maintain SOPs, troubleshooting guides, and training materials for the service team.
• Serve as the primary on-site contact for customers, site hosts, electrical contractors, utilities, and inspectors, explaining technical issues to non-technical audiences.
• Perform job hazard analysis, lockout/tagout, arc-flash risk assessment, and PPE selection for energized work; exercise stop-work authority and model safe work practices.
• Perform electrical work in accordance with NEC, including Article 625, local code, and manufacturer specifications.
• Complete an accurate field service report and close the ticket on the same day as every visit.
• Proactively communicate issues, delays, risks, and parts needs to the service manager with a proposed solution.
• Keep tools, test equipment, vehicle, and PPE calibrated, organized, and inspection-ready.
• Plan routes and workdays to maximize the number of sites served per trip.
• Perform other duties as assigned.

Benefits

• Medical, dental, and vision insurance.
• 401(k).
• Paid time off and holidays.
• Company vehicle, phone, laptop, tools, and PPE.
• Paid training and certification, including NFPA 70E, OSHA 30, EVITP, and OEM courses.
• Per diem on travel days.
• Paid on-call differential.
• Opportunity for advancement.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed