Eng. Rosales is an accomplished mining engineer with over twenty-five years of professional experience in the mining industry. He has worked for, and with multinational companies and has travelled extensively to different countries, including the US, Canada, Northern Europe and South Africa for both work and academic professional advancement.

He has achieved great success in on-site mine exploration in general, and mine drilling in particular. He has a wealth of knowledge in testing and exploration equipment and processes and has kept up to date with the latest technological advancement in this field, especially from Europe. He is adept in mine planning and establishing activity programs as well organising and leading a professional team to execute the same and achieve stated goals.