Guillermo received a Ph. D. in Electrical and Computer Engineering at the University of Waterloo (Ontario, Canada). His research was on Electricity Market in the areas of Congestion Management and Financial Rights, and screening and mitigation of Market Power. Afterwards, he was a Post-doctoral fellow and then a faculty member in the Department of Management Sciences at the University of Waterloo. Guillermo has been working at CAISO since 2007 in the groups of Market Performance and Congestion Revenue Rights. He has worked on the analysis of the various CAISO markets, on development and implementation of the market performance metrics of the new CAISO's markets, and also on the development and implementation of policies for CRRs. Then he worked in the Techynology Division testing the software application of the day-ahead, real-time and CRR markets, and providing market support in the control room. Currently he is the Manager of Market Validation and Quality Analsysis, where he is in charge of the group that validates the correctness of the market outcomes and carry out root-cause analysis. He is a member of the IEEE and of INFORMS. He serves as Editor for IEEE Transactions on Power Systems and also as a reviewer for the journals IEEE Transactions on Power systems, IET Gen and Trans Proceeding, Electric Power Research. He is also a member of the Subcommitte of Economics (PES). Dr. Bautista is the author of numerous papers about electricity markets and has presented his work in different forums throughout the world. He is the author of the book "Competition in Electricity Markets: Modelling and Economics" (2010), and also author of one chaper in the book of Financial Transmission Rights (2013).