Currently, Mario Antonio Bertoncini holds the position of Director-Investor Relations of Auren Energia SA and CEO & Investor Relations Officer at CESP - Companhia Energética de São Paulo (a subsidiary of Auren Energia SA) and Chief Financial Officer for Votorantim Metals Canada, Inc.

He previously was Chief Financial Officer & Senior VP-Finance at Nexa Resources SA and Finance Director of Nexa Resources Cajamarquilla SA (a subsidiary of Nexa Resources SA), Regional Director-Corporate Division at Itaú Unibanco SA, Regional Director-Regional Director at Banco Itaú BBA SA and Director-Treasury & Investor Relations at Votorantim SA.

Mr. Bertoncini received an undergraduate degree from Getulio Vargas Foundation and an MBA from The Wharton School of the University of Pennsylvania.