Field Service Technician III - BESS

ON.energy is building the power infrastructure that makes the AI era possible. As AI demand surges past what the grid and traditional data centers can support, ON.energy provides a new class of power technology proven at gigawatt scale and trusted by the world’s leading cloud and AI companies. Our systems are already deployed across 2.5 GW of hyper-scale campuses, validated by top U.S. national labs, and certified for grid-safe operation by major utilities. With real products in the field, we’re scaling faster than the grid can, transforming power from a bottleneck into a competitive advantage for the companies building the future. Location: Amarillo, TX Compensation: Salary, annual incentive bonus KEY RESPONSIBILITIES Preventative Maintenance Execute scheduled preventative maintenance (PM) tasks on ON.energy BESS equipment, inverters, and associated electrical infrastructure in accordance with OEM requirements and site-specific maintenance plans. Perform routine inspections, functional testing, and condition monitoring to identify potential issues before they result in equipment failure or unplanned downtime. Maintain accurate PM records and equipment histories within the CMMS, ensuring all work orders are opened, updated, and closed in real time. Adhere to PM scheduling windows and notify the O&M Manager promptly of any deferred work, observed anomalies, or required escalations. Reactive Maintenance & Troubleshooting Respond to equipment alarms, faults, and unplanned failures in a timely manner, performing systematic diagnosis and root cause identification. Execute testing procedures including insulation resistance, continuity, and functional testing to isolate faults and confirm equipment readiness post-repair. Perform component-level repair and replacement on inverters, battery modules, switchgear, and associated balance-of-plant equipment. Document all corrective maintenance activities, findings, and parts used within the CMMS and report outcomes to the O&M Manager. On-Call & After-Hours Response Participate in a rotating on-call schedule, maintaining availability to respond to site alarms and equipment issues outside of standard business hours, including evenings and weekends. Respond to on-call callouts within the required response time and take appropriate action to restore equipment to safe and operational status. Communicate clearly with the O&M Manager during after-hours events, providing timely status updates and escalating where required. CMMS & Data Integrity Create, update, and close work orders within the CMMS for all preventative and corrective maintenance activities in accordance with site data entry standards. Ensure equipment histories, parts consumption, and labor records are accurately captured to support asset lifecycle management and reporting. Follow CMMS workflows and procedures as directed by the O&M Manager; contribute to continuous improvement of maintenance records and documentation quality. Safety & Compliance Adhere to all site safety protocols, OSHA standards, NFPA 70E electrical safety requirements, and ON.energy work instructions at all times. Participate actively in toolbox talks, safety briefings, incident investigations, and corrective action implementation. Maintain personal protective equipment (PPE) and ensure proper lockout/tagout (LOTO) procedures are followed for all maintenance activities. Report all near-misses, incidents, and unsafe conditions to the O&M Manager immediately. Qualifications Required Associate degree, technical diploma, trade certification, or equivalent hands-on experience in Electrical Technology, Electronics, Power Systems, or a related field. 5-7 years of experience maintaining electrical systems, energy storage assets, renewable energy facilities, or critical infrastructure. Ability to read and interpret single-line diagrams, wiring schematics, and technical manuals. Valid driver's license. Ability to obtain and maintain CPR, OSHA 10/30, and NFPA 70E certifications. Availability for rotating on-call, weekend, and holiday coverage. Must reside in or relocate to the Amarillo, TX area. (relocation bonus will be considered) Preferred Experience with battery energy storage systems (BESS), inverters, switchgear, or medium/high-voltage equipment. Experience using CMMS platforms such as IBM Maximo, UpKeep, Fiix, or similar systems. What We Offer Competitive compensation with overtime eligibility Relocation assistance for qualified candidates On-call differential pay Medical, dental, and vision insurance 401(k) retirement plan with company match Opportunity to work on a high-profile data center project utilizing advanced energy storage technology Career growth within a rapidly expanding energy infrastructure company ON.energy is committed to creating an inclusive workplace and welcomes applicants from diverse backgrounds and experiences. For US-based roles - What you’ll get: Competitive salary + annual performance-based bonus eligibility Medical, dental, and vision insurance 401(k) with company match Paid time off and company holidays For Mexico-based roles - What you’ll get: Competitive salary + annual performance bonus eligibility Christmas Bonus (Aguinaldo): 30 days Major medical expenses and life insurance Paid time off and holidays (per local policy) For all roles: Professional development and growth opportunities Opportunity to grow with a mission-driven team shaping the future of clean energy Equal Opportunity: ON.energy is committed to equal employment opportunity and to maintaining a work environment free of harassment, discrimination, or retaliation. Accommodations: If you need an accommodation during the application process, email [email protected] Benefits vary by role and location and are subject to change.