Nov 2024 – Present
Junior Engineer
BART (Bay Area Rapid Transit) · Oakland, CA
- →Built a verified history of train false-occupancy events, cases where the signaling system reports a train on an empty track, by combining equipment logs, work orders, and manager notes, then cross-checking every date, location, and incident detail to resolve duplicates and conflicts. My SQL and Python analysis identified low receiver thresholds (~32.7%) and data-bit mismatch (~30%) as the leading cause groups, with wiring issues (~15%) as another contributing cause.
- →Analyzed passage logs, AI-camera detections, and field observations at three case-study stations to pinpoint where and when fare piggybacking concentrates. Those insights informed fare-gate software changes credited with a 30% decline in observed fare evasion, with improvements still rolling out. Found ADA gates drove ~40% of incidents and built Power BI dashboards to target mitigation pilots.
- →Extending my internship prototype, the fully offline RAG system, into a full Elasticsearch-based platform that ingests work orders and manuals, generates embeddings, and retrieves source-backed historical fixes, so technicians can troubleshoot faster in their day-to-day work. Designed for secure on-premises and hosted deployment.