Senior Field Service Technician EV Charging Tier III

Zero Impact Builders • Fresno, CA

12d • $75,000 - $85,000 • Onsite

About The Position

ChargeTronix is hiring a Senior (Tier III) Field Service Technician to support its modular DC fast chargers in a Southern California-based territory. This is the top technical field position on the service team and serves as the escalation point for difficult faults, new-site commissioning, and root-cause analysis of recurring issues. The technician owns territory uptime, mentors Tier I and Tier II technicians, acts as the primary on-site contact for customers and site hosts, and provides structured failure data to engineering. The role reports to the Field Service Manager and has no direct reports, while serving as a technical lead for technicians in the territory.

The work includes diagnosing and repairing DC fast-charger systems, including component-level repairs; commissioning, testing, and upgrading installations; maintaining territory reliability and spares; training technicians; and ensuring safe electrical work. The technician works independently with little supervision and makes on-site safety and repair decisions. Duties also include timely ticket documentation, proactive communication with the service manager, and maintaining tools, test equipment, vehicle, and PPE.

This is a full-time, exempt position based in Southern California, with 75% or more travel involving multi-day regional vehicle trips and periodic out-of-state air travel. The schedule is generally Monday through Friday, with a paid on-call rotation and occasional weekend or after-hours work for site outages. The technician plans routes and workdays to serve multiple sites efficiently and is generally home most weekends. Compensation is $75,000–$85,000 per year depending on experience, credentials, and platform expertise; travel-day per diem and an on-call differential are paid in addition to base pay.

The position involves frequent outdoor work in varied weather, energized equipment up to 480 VAC and 1,000 VDC, and physical activity including standing, climbing, lifting, and working in confined cabinet spaces. Reasonable accommodations will be made to enable qualified individuals with disabilities to perform the essential functions.

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/communication boards, contactors, and cooling systems, and cable/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.
• A 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 and California Electrician Trainee registration obtained within 90 days of hire.
• Current NFPA 70E qualified-person training, or ability to complete it within 60 days of hire; training is company-provided.
• OSHA 10 certification; OSHA 30 is preferred.
• Current CPR/First Aid certification including low-voltage rescue, or ability to complete it within 60 days of hire; training is company-provided.
• Valid driver’s license with a clean driving record, and 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 with ticketing and CRM tools such as Salesforce, Zendesk, or similar; Microsoft Office or Google Workspace; and writing clear field reports.
• Ability to work independently and make on-site decisions while recognizing when to seek assistance.
• Customer-first communication style and ability to remain calm with site hosts and drivers when stations are down.
• Reliability during heavy travel and ability to plan trips to maximize the number of sites served.

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/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 repair 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 repairs to 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 evidence such as logs, photos, and meter readings for engineering and warranty.
• Provide remote phone and video support to junior technicians working at live sites.
• Commission new installations by verifying incoming 480 V service, grounding and bonding, torque values, firmware, network and backend registration, and payment and authorization.
• Run 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 tests 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 weekly on territory uptime, mean time to repair, and first-time-fix rate.
• Perform scheduled preventive maintenance using the ChargeTronix checklist and recommend checklist changes.
• Identify recurring faults across sites, drive root-cause investigations, and write field service bulletins and work instructions.
• Manage truck stock and territory spares, and tag and return failed parts with complete failure data for RMA and warranty.
• Train and ride along with Tier I/II technicians and sign off their readiness to work independently.
• Write and maintain service-team SOPs, troubleshooting guides, and training materials.
• 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 as an NFPA 70E qualified person.
• Exercise stop-work authority and model safe work for junior technicians and site contractors.
• 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 the same day for 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.
• 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.
• Travel-day per diem.
• Paid on-call differential.
• Opportunity for advancement.
• Competitive salary.

What This Job Offers

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