Valentina Sierra

Valentina Sierra has extensive experience in fraud prevention and data analysis, currently serving as a Fraud Prevention Supervisor at Mercado Libre since December 2020. Previously, Valentina held various roles in the same department, progressing from Data Analyst to Supervisor. Before joining Mercado Libre, Valentina worked as a Marketing Effectiveness Analyst at Nielsen, where responsibilities included applying statistical tools and econometric modeling for marketing analysis. Valentina also gained experience as a Talent Development Trainee at Tenaris, focusing on data analysis and process automation. Educational qualifications include a degree in Industrial Engineering from the Instituto Tecnológico de Buenos Aires and a certification in Data Science from Digital House, along with international exchange experiences in Spain and Germany.