This 36th Peter A Leermakers Symposium celebrates George A. Petersson, Wesleyan Chemistry Professor and Fisk Professor of Natural Science's 70th birthday and his work on models for the prediction of thermochemistry and kinetics. It will bring together distinguished researchers who have made good use of Prof. Petersson's methods in their work, along with other theorists who work on the same topic and have their own approaches to the problem.