Mark E. Orazem is a Distinguished Professor of Chemical Engineering at the University of Florida, adjunct professor at the Beijing University of Chemical Technology, a Fellow of the Electrochemical Society, past President of the International Society of Electrochemistry, and recipient of the 2012 ECS Linford Award for Outstanding Teaching. He organized the 6th International Symposium on Electrochemical Impedance Spectroscopy and teaches short courses on impedance spectroscopy for industry and for The Electrochemical Society. Bernard Tribollet is Director of Research Emeritus at the Laboratory for Interfaces and Electrochemical Systems (LISE) at the University of Pierre and Marie Curie and adjunct professor at the Beijing University of Chemical Technology. He instructs an annual short course at his university on impedance spectroscopy. He is a Fellow of The Electrochemical Society, Treasurer of the International Society of Electrochemistry, and organized the 2010 Annual Meeting of the International Society of Electrochemistry held in Nice, France.