Zilong Su
Sr. Aftersales Engineer @ Gotion Inc.
About
My current role as BESS O&M Lead at Calpine involves overseeing maintenance operations for one of the world’s largest standalone BESS facilities. I manage diagnostics, repairs, and compliance across critical systems, collaborating with teams to enhance energy delivery and grid reliability. My focus is on implementing preventive strategies that improve operational efficiency and long-term system sustainability.
United States
San Francisco Bay Area
Higher Education
R (Programming Language), Data Analysis, Data Cleaning, SCADA, Electrical Troubleshooting, Battery Management Systems, Lithium Batteries, Energy Storage, Utility-Scale Energy Storage, Python (Programming Language)
Experience

Sr. Aftersales Engineer
Peoria, IL
ESS Projects: Serve as primary technical point of contact for customers, addressing product performance, system operation, and post-deployment issues Perform fault diagnostics and root-cause analysis across battery systems, implementing corrective actions to restore functionality and minimize downtime Coordinate with cross-functional teams (engineering, quality, production, supply chain) to resolve after-sales issues and improve system reliability Develop and implement a warranty claim tracking system, enhancing organization, visibility, and response time for customer support operations EV Projects: Served as PIC for the Rivian battery remanufacturing project, driving facility improvements to meet Rivian’s safety, technical, and operational standards Identified and closed compliance gaps across safety, process, and quality systems to achieve audit readiness Developed and refined SOPs and quality control procedures for EV battery handling and repair Elevated the service center to a compliant, audit-ready facility capable of supporting Rivian battery diagnostics, repair, and remanufacturing.

Aftersales Engineer
United States
Troubleshot Battery Energy Storage System (BESS) issues across various utility-scale sites. Provided tailored aftersales solutions to clients, enhancing their operational efficiency. Collaborated with cross-functional teams to ensure seamless integration of energy storage systems.

BYD O&M Lead
Menifee, California, United States
Oversee battery maintenance for one of the world’s largest standalone BESS facilities—Calpine’s Nova Power Bank. Responsible for ensuring site energy availability, supporting continuous energy delivery and grid reliability. Manage a team of technicians and direct full maintenance operations across BMS, HVAC, auxiliary systems, and BYD Cube Pro (T28) battery enclosures. Oversee diagnostics, repairs, preventive maintenance, and safety compliance while coordinating with engineering teams, contractors, and vendors. Support commissioning activities and provide up-to-date project schedules, coordinating with EPC and client teams to ensure smooth and efficient commissioning progress. Implement maintenance strategies and reporting systems to enhance efficiency, compliance, and long-term system reliability.

Project Manager
Los Angeles, California, United States
Scaled brand from 3 to 30+ locations, transforming it into a multi-state franchise. Managed 10+ full-cycle store developments: site selection, lease negotiation, budgeting, construction, permitting, and launch. Led cross-functional coordination with contractors, architects, and vendors to deliver projects on time and within budget. Developed SOPs, trained new store teams, and supported franchisees to ensure consistent operations and faster profitability. Delivering regular updates on project status, cost tracking, and potential risks.

Project Manager
Macho Burger - Sawtelle
Los Angeles, California, United States
Managed the successful opening of a new Macho Burger location, overseeing all project phases. Conducted lease negotiations and selected optimal site to maximize customer reach. Developed standard operating procedures and training programs, enhancing operational efficiency. Trained FOH and BOH scews, ensuring a smooth launch and consistent service quality.
Zilong Su's Contact Information
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