Using novel experimental techniques coupled with mathematical modeling, University of Toronto Professor Vladimiros Papangalakis has made significant contributions to the development of hydrometallurgical processes. He developed the first comprehensive model simulating the autothermal operation of reactors for the pressure oxidation of gold ores and pioneered the development of an on-line sensor for predicting the acid requirements for nickel extraction from nickeliferous laterites. Recognized internationally, this distinguished researcher has made sustained contributions to the engineering profession through his mentoring of young engineers and his leadership within technical societies, including service as President of the Metallurgy and Materials Society of the CIM.