Mariana Leoncio

Responsible for rolling stock and workshop maintenance engineering for two metro lines, ensuring 99% availability. Delivered delayed CAPEX projects, reaching 95% execution of a BRL 7M budget. Developed the five‑year CAPEX plan based on asset condition and lifecycle analysis. Monitored KPI, MTBF, and MTTR and supported RCA. Managed suppliers, led analysts, supported legal cases, and contributed to safety investigations.

Managed documentation for railway vehicles and maintenance equipment in ProjectWise, handling 500+ documents per phase. Prepared technical specifications, test procedures, and manuals in line with EN, ISO, IEC, and DIN standards. Coordinated procurement for assembly, commissioning, and testing of a 14‑train fleet. Acted as an interface between the engineering team in China and the client in Brazil. Monitored and closed open points for the fleet and maintenance systems

Developed and maintained plans, procedures, and technical specifications in compliance with national and international standards. Analyzed failure modes to improve projects, conducted studies for product and supplier approval, and provided technical support for specifications. Monitored manufacturing processes for trains and spare parts in China and the Czech Republic. Conducted static and dynamic commissioning tests to assist suppliers and ensure equipment reliability under warranty.