Senior Field Service Technician EV Charging Tier III

Zero Impact Builders • Modesto, CA

12d • $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 technician handles escalated DC fast-charger faults, commissions new sites, and turns recurring failures into root causes, field service bulletins, and work instructions. The role owns uptime across a Southern California-based territory, mentors Tier I/II technicians, serves as the primary on-site customer contact, and provides structured failure information to engineering. It requires independent work with little supervision and sound safety and repair judgments on site. The position reports to the Field Service Manager and has no direct reports, but serves as a technical lead for Tier I/II technicians in the territory.

The work includes component-level diagnosis and repair of DC fast chargers; commissioning and acceptance testing; preventive maintenance, upgrades, and retrofits; reliability reporting and territory spares management; technician training; safety compliance; and accurate, timely service documentation. The technician uses charger logs, communication traces, electrical test equipment, and networking tools to diagnose issues and resolve customer-site problems.

This is a full-time, exempt position with a Southern California home base and travel of 75% or more, including multi-day 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 own routes and workdays; they are generally home most weekends. Pay is $75,000–$85,000 per year depending on experience, credentials, and platform depth, with per diem on travel days and an on-call differential paid in addition to base salary.

The role involves outdoor work in varied weather and noisy environments, work in confined charger cabinets and around energized equipment up to 480 VAC and 1,000 VDC with appropriate PPE, frequent lifting and movement of 50 pounds, and periodic heavier lifts with assistance or equipment. It also requires driving a company vehicle for extended periods and periodic air travel. ChargeTronix states that reasonable accommodations will be made to enable qualified individuals with disabilities to perform 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-charging hardware, including power modules, control or communication boards, contactors, and cooling systems, plus 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 that others follow.
• 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 completion within 60 days of hire; the company provides the training.
• OSHA 10 certification; OSHA 30 is preferred.
• Current CPR/First Aid, including low-voltage rescue, or completion within 60 days of hire; the company provides the training.
• 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 decisively on site, while recognizing when to seek assistance.
• Customer-first communication, including remaining calm with site hosts and drivers during outages and clearly explaining issues.
• 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, such as 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.
• Commissioning experience with solar, battery storage, UPS, or other power-electronics equipment.
• Aerial lift or forklift certification.
• Bilingual English/Spanish.

Responsibilities

• Diagnose and resolve Tier III escalations involving DC fast-charger power electronics, control and communication boards, contactors, cooling systems, cable and connector assemblies, and vehicle interoperability.
• Perform component-level repairs where appropriate, including work on power modules, SECC/PD/MCU boards, power supplies, contactors, IGBTs, and sensors.
• Read PLC, CAN, and OCPP logs; isolate root causes; and capture logs, photos, and meter readings for engineering and warranty.
• Provide live remote phone and video troubleshooting support to junior technicians.
• Commission new installations by verifying incoming 480 V service, grounding and bonding, torque values, firmware, network and backend OCPP registration, and payment and authorization functionality.
• Run acceptance charge tests across vehicle platforms and CCS1, NACS, and CHAdeMO connector types, and sign off that sites are ready for service.
• Maintain and update the test-vehicle fleet, including hardware, software, and adapters, 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 PM checklist and recommend checklist updates.
• Identify recurring faults 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 accompany Tier I/II technicians, and sign off their readiness to work independently.
• Write and maintain SOPs, troubleshooting guides, and service-team training materials.
• Serve as the primary on-site contact for customers, site hosts, electrical contractors, utilities, and inspectors; explain technical issues to non-technical audiences.
• Perform job hazard analysis, lockout/tagout, arc-flash risk assessment, and PPE selection on energized jobs as an NFPA 70E qualified person; exercise stop-work authority and model safe 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 each visit.
• Proactively communicate issues, delays, risks, and parts needs to the service manager and propose solutions.
• 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.
• Per diem on travel days and an on-call differential in addition to base pay.
• Opportunity for advancement.

What This Job Offers

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