Aaron Choi

Aaron Choi serves as a procurement specialist within the Southern California Regional Rail Authority, supporting the agency’s mission to modernize and maintain a safe, reliable commuter rail network. In this capacity, he manages the acquisition lifecycle for critical infrastructure and operational support services, with a primary focus on hazardous waste collection and environmental remediation contracting. His role ensures compliance with state and federal environmental regulations while facilitating the safe handling, transportation, and disposal of regulated materials generated by rail maintenance and track rehabilitation activities. Choi’s acquisitions directly enable the agency’s operational continuity and environmental stewardship goals. While no specific contractor relationships are currently documented in the system, Choi’s procurement patterns indicate consistent engagement with specialized environmental services vendors capable of handling classified hazardous waste streams under DOT and EPA guidelines. He typically works with certified haulers, treatment, storage, and disposal facilities (TSDFs), and firms holding RCRA permits, fostering long-term vendor partnerships grounded in regulatory compliance and operational reliability. Choi’s contracting activity is exclusively non-set-aside, with 100% of procurements awarded through full and open competition. This reflects a strategic preference for technical capability and regulatory certification over socioeconomic set-asides, prioritizing mission-critical performance and environmental safety over socioeconomic classifications. His primary NAICS focus is 562112 (Hazardous Waste Collection), indicating deep specialization in the procurement of waste management services for rail maintenance operations, including contaminated soil, rail ties, ballast debris, and chemical residues from brake and lubricant systems. His expertise lies in evaluating contractor capabilities in spill response, manifest tracking, and compliance with hazardous materials transportation standards, ensuring that environmental risks are mitigated across the agency’s expanding rail network.