Alberto Berizzi obtained the MSc Degree in Electrical Engineering in 1990, and the PhD Degree in 1994 at the Politecnico di Milano. Assistant Professor at the Politecnico di Milano from 1992 to 1988, since 1998 he has been an Associate Professor of Electric Power Systems and since 2006 he is full professor of Electric Power Systems. Currently, he teaches the courses of “Electric power systems” and of “Power generation and Renewables” for students of the MSc in Electrical Engineering. Moreover, he teaches for the PhD in Electrical Engineering as well. His research is testified by more than 220 papers and publications dealing with power systems. In particular, the security is taken into account during the analysis and control of electric power systems, their optimization, with reference to voltage collapse, reactive power flow control and security of voltage control, also taking into account the Secondary Voltage Control typical of the Italian power system. Moreover, he worked on short-circuit current computations adopting IEC or ANSI Standards and on some mathematical issues linked to the study of large power systems, such as sparsity of matrices. Recently, his activity concentrated on interactions between power system operation and planning and the electricity market operation, in particular for security issues: zonal markets, determination of market zones, computation of Total Transfer Capacity, optimization using innovative – with respect to vertically integrated systems – objective functions, use of probabilistic concepts applied to the determination of TTC and finally to security. After the blackouts that stroke several Countries in 2003, he worked on large power system dynamic perturbations. Recently, his activity was addressed to the modelling, monitoring and control of power system dynamics.