Javier Sierra

Evaluate AI model outputs against project guidelines, ensuring accuracy and consistency.
Review and rate responses across multiple task types with detailed feedback, identify recurring error patterns to improve evaluation guidelines, and meet daily quality and productivity targets.
Collaborate with team leads to align criteria and resolve edge cases.

Managed supplier and internal communications, resolving purchase-related inquiries with accurate documentation and timely follow-up. Reduced administrative errors by 15% using improved Excel and Power BI reporting workflows and supported streamlined vendor payment and delivery coordination.

Coordinated internal operations and project timelines as the main point of contact for multi-department stakeholders. Implemented SAP and Power BI, built KPI dashboards for strategic decisions, and improved cross-department information flow.

Supervised customer service operations at People First Stadium during large-scale events with 30,000+ attendees. Achieved 98% compliance with service and safety standards and resolved escalated complaints in real time to protect customer satisfaction.

Delivered high-volume customer service across events and venues, prioritizing satisfaction and operational efficiency. Supported inventory management, KPI tracking, and coordination of operational processes.

Managed portfolios across individual, corporate, and SME clients, delivering tailored financial advice and support across product suites. Increased client base by 40%+ and improved retention by 30%, driving 30%+ growth in secured loan market share.

In-progress accounting studies at the National University of Entre Rios.

Completed an Advanced Diploma in Business Administration and Management through TAFE Queensland from January 2023 to November 2024.